Automatic analysis method and automatic analysis system for polymer end group

Abstract

The invention relates to an automatic analysis method and an automatic analysis system for a polymer end group. The analysis process after the polymer sample is weighed is automatically carried out, so that an improved analysis working environment can be provided for testers, and a high-reliability analysis result can be obtained.

Description

Technical Field

[0001] The present invention relates to a method and a system for automatically analyzing polymer end groups. By analyzing polymer end groups in an automated manner, the molecular weight and characteristics (physical properties) of polymers can be predicted. Background Art

[0002] Analyzing end groups bound to polymers is one of the methods for predicting the molecular weight of polymers and identifying basic characteristics that affect their physical properties after processing the polymers.

[0003] Methods for analyzing polymer end groups include titrating polymer samples. Specifically, a polymer sample is weighed and then dissolved and cooled, and an indicator and a titrant are added, and the change in color is visually observed to analyze the content of polymer end groups.

[0004] However, since the entire process is manually performed, the method of titrating polymer samples has the limitation of being labor-intensive. There is also a problem that the analysis results are in error due to differences in judgment criteria among testers. In addition, testers are exposed to high temperatures to dissolve the solvents and polymer samples used in each procedure; therefore, the safety of testers during the test may be compromised. In addition, in order to reuse, all test tubes, beakers, and other equipment used in the titration process must be cleaned, which is also very inconvenient.

[0005] Therefore, there is a need to develop an analytical technique for analyzing polymer end groups to improve the working environment of testers and reduce errors in analysis results at the same time.

[0006] [Prior Art Documents]

[0007] [Patent Documents]

[0008] (Patent Document 1) Korean Patent Publication No. 2020-0046622. Summary of the Invention

[0009] Technical Problem

[0010] An object of the present invention is to provide a method and a system for automatically analyzing polymer end groups. By analyzing polymer end groups in an automated manner, errors in analysis results can be minimized, and the working environment of testers can be improved.

[0011] Solution to the Problem

[0012] To achieve the above object, the present invention provides a method for automatically analyzing polymer end groups, which includes: (1) loading a container containing a polymer sample into an auto-sampler; (2) adding a solvent containing an aromatic compound having at least one hydroxyl group to the container containing the polymer sample, and heating to obtain a polymer sample solution; (3) cooling the polymer sample solution; (4) adding an indicator to the cooled polymer sample solution, titrating with a titrant, and observing the change in the colorimetric electrode potential value; and (5) analyzing the change in the potential value through software to calculate the content of the polymer end groups.

[0013] In addition, the present invention provides a polymer end group automatic analysis system, which includes: a sample supply unit including an auto-sampler in which a container containing a polymer sample is installed; a heating unit including a solvent injection tube for injecting a solvent containing an aromatic compound having at least one hydroxyl group into the container containing the polymer sample, a heating rod for heating the polymer sample injected with the solvent, and a cooling solvent injection tube for injecting a cooling solvent to cool the polymer sample solution obtained by heating; a titration unit including an indicator injection tube for injecting an indicator into the polymer sample solution cooled by the cooling solvent, a titrant injection tube for injecting a titrant into the polymer sample solution into which the indicator has been injected, and a colorimetric electrode for displaying the change in the potential value determined by the amount of the injected titrant; a dispensing control unit including a solvent dispenser for dispensing the solvent into the solvent injection tube, an indicator dispenser for dispensing the indicator into the indicator injection tube, and a titrant dispenser for dispensing the titrant into the titrant injection tube; a pump control unit including a solvent supply pump for supplying the solvent to the solvent dispenser and a cooling solvent supply pump for supplying the cooling solvent to the cooling solvent injection tube; and an automatic data processing unit including software for analyzing the change in the potential value and an output device for outputting the analysis result obtained through the software.

[0014] Advantages of the Invention

[0015] According to the present invention, since the analysis process of the polymer end groups is controlled by software, highly accurate analysis results can be obtained. In addition, since the entire process of analyzing the end groups after weighing the polymer sample is automated, the working environment of the tester (analyst) can be improved (ensuring safety and reducing labor). Description of the Drawings

[0016] Figure 1 Shows a flowchart of a polymer end group automatic analysis program according to an embodiment of the present invention.

[0017] Figure 2 Shows a schematic diagram of a polymer end group automatic analysis system according to an embodiment of the present invention. Detailed Embodiments

[0018] Best Mode for Carrying Out the Invention

[0019] The present invention will be described in detail below. The present invention is not limited to the content disclosed below, and can be modified into various forms as long as the gist of the present invention is not changed.

[0020] In this specification, the term "comprising" is intended to specify particular features, regions, steps, methods, elements, and / or components. Unless otherwise expressly stated, the presence or addition of any other features, regions, steps, methods, elements, and / or components is not excluded.

[0021] Unless otherwise specified, all numbers and expressions related to the amounts of components, reaction conditions, etc. used herein should be understood to be modified by the term "about".

[0022] For convenience of description, the sizes of the various elements in the drawings may be exaggerated and they may be different from the actual sizes.

[0023] Automatic Analysis Method for Polymer End Groups

[0024] The present invention relates to a method for analyzing polymer end groups to predict the molecular weight of polymers and identify the basic characteristics that affect their physical properties after processing the polymers. It is characterized in that the entire procedure after weighing the polymer sample is carried out automatically.

[0025] Specifically, the automatic analysis method for polymer end groups according to the present invention includes: (1) loading a container containing a polymer sample into an autosampler; (2) adding a solvent containing an aromatic compound having at least one hydroxyl group to the container containing the polymer sample and heating to obtain a polymer sample solution; (3) cooling the polymer sample solution; (4) adding an indicator to the cooled polymer sample solution and titrating with a titrant to check the change in the colorimetric electrode potential value; and (5) analyzing the change in the potential value through software to calculate the content of the polymer end groups. Below, reference is made to Figure 1 Describe this.

[0026] Step (1): Loading the container into the autosampler

[0027] According to the present invention, step (1) is to load a container containing a polymer sample into an autosampler. The number of containers installed in the autosampler can be one or more. Specifically, it can be 1 to 25, 2 to 20, or 5 to 15.

[0028] At the same time, a predetermined amount can be weighed in advance before putting the polymer sample into the container.

[0029] Step (2): Obtaining the polymer sample solution

[0030] According to the present invention, in step (2), a solvent containing an aromatic compound having at least one hydroxyl group is added to a container containing a polymer sample, and heated to obtain a polymer sample solution.

[0031] The aromatic compound having at least one hydroxyl group (specifically, having 1 to 4 hydroxyl groups or 1 to 2 hydroxyl groups) contained in the solvent is not particularly limited as long as it does not react with the polymer sample and does not have a carboxyl group. Specifically, the aromatic compound having at least one hydroxyl group may include at least one selected from the group consisting of phenol, o-cresol, m-cresol, p-cresol, o-chlorophenol, m-chlorophenol, p-chlorophenol, 2,6-xylenol, catechol, resorcinol, hydroquinone, pyrogallol, and benzyl alcohol. Since the solvent contains an aromatic compound, the polymer sample can be dissolved at a lower heating temperature, thereby stabilizing the heating procedure (for example, the procedure of heating a mixture of the polymer sample and the solvent with a heating rod). Therefore, automation of the analysis procedure can be achieved.

[0032] The heating of the polymer sample injected with the solvent can be specifically carried out at a temperature of 60°C to 100°C for 400 seconds to 900 seconds. More specifically, the heating can be carried out at 60°C to 90°C, 60°C to 85°C, 63°C to 80°C, 65°C to 75°C, 65°C to 70°C, or 65°C to 68°C for 400 seconds to 800 seconds, 430 seconds to 700 seconds, 450 seconds to 650 seconds, 500 seconds to 650 seconds, 500 seconds to 600 seconds, or 500 seconds to 550 seconds. When the heating temperature and heating time are within the above ranges, the polymer sample can be well dissolved, while the solvent does not boil over, and a polymer sample solution can be effectively obtained.

[0033] At the same time, the solvent containing an aromatic compound having at least one hydroxyl group has a low freezing point; therefore, when the temperature of the analysis environment drops below a certain level, it may solidify and adhere to the container. Therefore, the solvent may further include at least one auxiliary solvent selected from the group consisting of chloroform, dichloromethane, and isopropanol. When the solvent further contains an auxiliary solvent, the freezing point of the solvent can be increased to prevent the solvent from solidifying (prevent the solvent from precipitating). Therefore, automation of the analysis procedure can be well achieved.

[0034] When the solvent includes an aromatic compound (a) having at least one hydroxyl group and a co-solvent (b), their mixing ratio (a:b) is not particularly limited. Specifically, the weight ratio can be 5:1 to 1:5, 4:1 to 1:4, 3:1 to 1:3, or 2:1 to 1:2. When the mixing ratio is within the above range, the solvent does not solidify, and within the heating temperature and heating time range, the polymer sample containing the solvent can be well dissolved, so that a polymer sample solution can be efficiently obtained.

[0035] Step (3): Cooling the polymer sample solution

[0036] According to the present invention, step (3) is to cool the polymer sample solution. The cooling of the polymer sample solution can be carried out naturally or intentionally. Specifically, natural cooling can be carried out by placing the polymer sample solution at room temperature for a period of time. Intentional cooling can be carried out by injecting a cooling solvent into the polymer sample solution.

[0037] The cooling solvent may further include at least one selected from the group consisting of chloroform, dichloromethane, and isopropanol. When the polymer sample solution is cooled by the cooling solvent, the polymer sample solution can be cooled in a short time. In addition, in the procedure of injecting the cooling solvent into the polymer sample solution, the heating rod for heating the mixture of the polymer sample and the solvent can be automatically cleaned. Since there is no need to manage the heating rod as a heat source through a manual cleaning procedure, the present invention can provide an improved working environment for testers.

[0038] Step (4): Titration of the polymer sample solution

[0039] According to the present invention, step (4) is to add an indicator to the cooled polymer sample solution, titrate with a titrant, and check the change in the colorimetric electrode potential value. Conditions such as the addition amount, addition rate, and addition time of the indicator and the titrant to the polymer sample solution can be automatically controlled by the values preset (input) in the software. In addition, the change in the colorimetric electrode potential value can also be checked through the output of the software to collect the results.

[0040] The indicator may specifically include at least one selected from the group consisting of bromophenol blue, phenol red, and methyl red. When the indicator contains the above components, the sensitivity (reactivity) of the colorimetric electrode is improved, so that high-precision analysis results can be obtained.

[0041] The titrant may specifically include at least one selected from the group consisting of sodium hydroxide (NaOH) and potassium hydroxide (KOH). When the titrant contains the above components, the titration efficiency can be improved.

[0042] Step (5): Calculation of the polymer end group content

[0043] According to the present invention, in step (5), the software analyzes the change in the potential value to calculate the content of the polymer end groups. Specifically, the software automatically calculates the content of the polymer end groups by analyzing the inflection points (equivalence point changes) in the data of the collected potential value changes.

[0044] The software can be integrated with the software that controls the conditions for adding the indicator and the titrant in step (4), or it can be a separate software.

[0045] Meanwhile, the automatic analysis method for the polymer end groups of the present invention may further include a step (step (6)) of providing a cleaning solvent to clean the colorimetric electrode in step (4). Specifically, the washing solvent may be selected from at least one of the group consisting of acetone, acetonitrile, isopropanol, and water. When the cleaning solvent contains the above components, it can effectively clean the colorimetric electrode. Since there is no need to manage the colorimetric electrode through a manual cleaning procedure, the present invention can provide an improved working environment for the testers.

[0046] For the polymer (polymer sample) that can be analyzed by the automatic analysis method of the present invention, as long as it is a polymer having a carboxyl group, there is no particular limitation. Specifically, it may be polyethylene terephthalate (PET) or polyethylene terephthalate glycol (PETG).

[0047] In addition, there is no particular limitation on the polymer end groups that are the analysis objects of the automatic analysis method according to the present invention. It may be a carboxyl group (COOH), and its content can be confirmed relatively accurately by the automatic analysis method.

[0048] As described above, since the automatic analysis method according to the present invention automatically performs procedures such as dissolution, cooling, titration, and washing after weighing the polymer sample, while ensuring the stability of the analysis work of the tester, it can greatly reduce the labor input in the analysis procedures. In addition, since the automatic analysis method according to the present invention controls the analysis procedure of the polymer end groups through software, high-precision analysis results can be obtained.

[0049] Automatic analysis system for polymer end groups

[0050] The present invention provides an automatic analysis system for polymer end groups, which can implement the above automatic analysis method. Specifically, the automatic analysis system for polymer end groups of the present invention includes a sample supply unit; a heating unit; a titration unit; a dispensing control unit; a pump control unit; and an automatic data processing unit. Below, refer to Figure 2 Describe it accordingly.

[0051] Sample supply unit

[0052] According to the present invention, the sample supply unit (10) includes an automatic sampler (11) in which a container (12) containing a polymer sample is installed.

[0053] The automatic sampler (11) sequentially supplies the container (12) containing the polymer sample to the heating unit (20) and the titration unit (30). At least one container (12) can be installed. Specifically, 1 to 25, 2 to 20, or 5 to 15 containers can be installed. In the present invention, since an automatic sampler (11) capable of carrying multiple containers (12) is adopted, and the carried containers (12) can be automatically supplied to the heating unit (20) and the titration unit (30) to perform heating and titration procedures respectively, multiple polymer samples can be analyzed simultaneously to obtain highly accurate analysis results.

[0054] Meanwhile, the container (12) installed in the automatic sampler (11) can be a disposable container or a reusable container. Specifically, it can be a disposable container made of polypropylene (PP). When the container (12) is a disposable container, the conventional operation of cleaning the used container after analysis can be omitted. Here, since the heating in the heating unit (20) is performed at a relatively low temperature (for example, 60°C to 90°C), a disposable container can be used.

[0055] Heating unit

[0056] According to the present invention, the heating unit (20) includes a solvent injection tube (21) for injecting a solvent containing an aromatic compound having at least one hydroxyl group into the container (12) containing the polymer sample; a heating rod (22) for heating the polymer sample into which the solvent has been injected; and a cooling solvent injection tube (23) for injecting a cooling solvent to cool the polymer sample solution obtained by heating.

[0057] The solvent injection tube (21) and the cooling solvent injection tube (23) are not particularly limited as long as they each have a structure that allows the solvent and the cooling solvent to flow smoothly and are made of materials that are tolerant to each solvent. In addition, the heating rod (22) is not particularly limited as long as it can stably dissolve the polymer sample into which the solvent has been injected.

[0058] Here, for the stable operation of the heating rod (22), the solvent injected through the solvent injection tube (21) may further include at least one auxiliary solvent selected from the group consisting of chloroform, dichloromethane, and isopropanol. That is, a mixed solvent of an aromatic compound having at least one hydroxyl group and the auxiliary solvent can be injected into the container (12) through the solvent injection tube (21).

[0059] In addition, the heating rod (22) can be rinsed with the cooling solvent injected through the cooling solvent injection tube (23) as the polymer sample solution cools. In this case, the cleaning procedure of the heating rod (22) using the cooling solvent can be carried out simultaneously with the cooling procedure of the polymer sample solution, or can be carried out before or after the cooling procedure of the polymer sample solution.

[0060] The heating unit (20) may further include a stirrer (not shown) to facilitate the dissolution of the polymer sample, and a discharge device (not shown) to automatically discharge the cooling solvent used in the cleaning procedure of the heating rod (22).

[0061] Titration unit

[0062] The titration unit (30) includes: an indicator injection tube (31) for injecting an indicator into the polymer sample solution cooled by the cooling solvent; a titrant injection tube (32) for injecting a titrant into the polymer sample solution into which the indicator has been injected; and a colorimetric electrode (33) that displays the change in the potential value determined by the amount of the injected titrant.

[0063] There are no particular limitations on the indicator injection tube (31) and the titrant injection tube (32) as long as they each have a structure that allows the smooth flow of the indicator and the titrant and are made of a material that is tolerant to each indicator and titrant.

[0064] In addition, there are no particular limitations on the colorimetric electrode (33) as long as it can clearly display the change in the potential value (color change) according to the amount of the injected titrant. Specifically, the colorimetric electrode (33) can be a photometric sensor electrode (optrode). Since a photometric sensor electrode is adopted, titration analysis can be carried out quickly, simply, and accurately.

[0065] Meanwhile, the titration unit (30) may further include a cleaning solvent injection tube (34) for injecting a cleaning solvent for cleaning the colorimetric electrode (33). There are no particular limitations on the cleaning solvent injection tube (34) as long as it has a structure that allows the smooth flow of the cleaning solvent and is made of a material that is tolerant to the cleaning solvent.

[0066] In addition, the titration unit (30) may further include a stirrer (not shown) to facilitate the titration of the polymer sample solution, and a discharge device (not shown) to automatically discharge the cleaning solvent used in the cleaning procedure of the colorimetric electrode (33).

[0067] Distribution control unit

[0068] According to the present invention, the dispensing control unit (40) includes a solvent dispenser (41) for dispensing a solvent into the solvent injection tube (21); an indicator dispenser (42) for dispensing an indicator into the indicator injection tube (31); and a titrant dispenser (43) for dispensing a titrant into the titrant injection tube (32).

[0069] The solvent dispenser (41), the indicator dispenser (42), and the titrant dispenser (43) may not be particularly limited as long as each has a structure that allows the solvent, indicator, and titrant to flow smoothly and is made of a material that is tolerant of each solvent, indicator, and titrant.

[0070] Since the injection amounts and injection speeds of the solvent, indicator, and titrant are precisely controlled by the dispensing control unit (40), the present invention can perform the analysis procedure efficiently and obtain analysis results with high precision.

[0071] Pump control unit

[0072] According to the present invention, the pump control unit (50) includes a solvent supply pump (51) for supplying a solvent to the solvent dispenser (41); and a cooling solvent supply pump (52) for supplying a cooling solvent to the cooling solvent injection tube (23).

[0073] In addition, the pump control unit (50) may further include a cleaning solvent supply pump (53) for supplying a cleaning solvent to the cleaning solvent injection tube (34).

[0074] The solvent supply pump (51), the cooling solvent supply pump (52), and the cleaning solvent supply pump (53) may be any pumps that can cause the respective solvents to flow, and are not particularly limited.

[0075] Since the pump control unit (50) controls the supply and flow of each solvent, the present invention can automate the analysis process.

[0076] Automatic data processing unit

[0077] According to the present invention, the automatic data processing unit (60) includes software (61) for analyzing the change in potential value, and an output device (62) for outputting the analysis result obtained by the software.

[0078] Specifically, the automatic data processing unit (60) may be a well-known computer. The automatic data processing unit (60) is connected to the sample supply unit (10), the heating unit (20), the titration unit (30), the dispensing control unit (40), and the pump control unit (50) respectively in a wired or wireless manner. Therefore, the operating conditions that must be applied when each unit operates can be set (controlled).

[0079] In the automatic analysis system of the present invention, since the heating unit (20) is separated from the titration unit (30), no heat is applied to the colorimetric electrode (33) during the heating process, thus the durability of the colorimetric electrode (33) will not be reduced due to heat. In addition, the dissolution process, cooling process, and titration process of the polymer sample, as well as the cleaning process of the test equipment used, are all carried out automatically, thereby providing an optimized analysis environment and reliable analysis results for the testers.

[0080] Invention mode

[0081] The present invention will be described in more detail below with reference to the embodiments. However, these embodiments are provided for illustrative purposes only, and the present invention is not limited thereto.

[0082] [Example 1]

[0083] PET semi-finished product fragments were selected as the polymer sample, and the automatic analysis system shown was used to automatically analyze the carboxyl content of the PET end-group bond. Specifically, the PET semi-finished product fragments were placed in a disposable container made of polypropylene and then installed in the automatic sampler. Figure 2

[0084] Then, 60 ml of a mixed solvent of o-cresol and chloroform with a weight ratio of 2:1 was injected into the disposable container and heated at 65 °C for 500 seconds to obtain a PET solution.

[0085] Then, 10 ml of chloroform was injected, the obtained PET solution was cooled, and the heating rod was cleaned.

[0086] Then, the titration conditions were set according to the Mettler Toledo titration procedure, and the cooled PET solution was titrated to calculate the carboxyl content. Here, bromophenol blue was used as the indicator and 0.1N NaOH solution was used as the titrant.

[0087] Subsequently, the carboxyl content analysis procedure was repeated for 4 days to collect analysis data. The results are shown in Table 1 below.

[0088] [Example 2]

[0089] The carboxyl content was automatically analyzed using the same procedure as in Example 1, except that PET BR fragments were used instead of PET semi-finished product fragments as the polymer sample. The results are shown in Table 1 below.

[0090] [Table 1]

[0091]

[0092] ​Referring to Table 1 above, as a result of the automatic analysis of the PET sample, it was confirmed that the content of carboxyl (COOH) was analyzed within the range of the regular management content of carboxyl (COOH). This proves that reliable analysis results can be obtained by analyzing the polymer end group content through the automatic analysis method (system) of the present invention.

[0093] [Example 3]

[0094] The carboxyl content was automatically analyzed according to the same procedure as in Example 1, except that the type of polymer sample was changed. The results are shown in Table 2 below.

[0095] [Table 2]

[0096]

[0097] Referring to Table 2 above, when analyzing the carboxyl (COOH) content of various polymer samples using the automatic analysis method (system) of the present invention, it can be confirmed that within the range where the carboxyl content deviation is not large, the analysis effect is good.

[0098] [Reference Numeral Explanation]

[0099] 10: Sample Supply Unit

[0100] 11: Automatic Sampler 12: Container

[0101] 20: Heating Unit

[0102] 21: Solvent Injection Tube 22: Heating Rod

[0103] 23: Cooling Solvent Injection Tube

[0104] 30: Titration Unit

[0105] 31: Indicator Injection Tube 32: Titrant Injection Tube

[0106] 33: Colorimetric Electrode 34: Cleaning Solvent Injection Tube

[0107] 40: Dispensing Control Unit

[0108] 41: Solvent Dispenser 42: Indicator Dispenser

[0109] 43: Titrant Dispenser

[0110] 50: Pump Control Unit

[0111] 51: Solvent Supply Pump 52: Cooling Solvent Supply Pump

[0112] 53: Cleaning Solvent Supply Pump

[0113] 60: Automatic Data Processing Unit

[0114] 61: Software 62: Output device.

Claims

1. An automatic analysis method for polymer end groups, which comprises: (1) Loading a container containing a polymer sample into an automatic sampler; (2) Adding a solvent containing an aromatic compound having at least one hydroxyl group to the container containing the polymer sample, and heating to obtain a polymer sample solution; (3) Cooling the polymer sample solution; (4) Adding an indicator to the cooled polymer sample solution, titrating with a titrant, and checking the change in the colorimetric electrode potential value; and (5) Analyzing the change in the potential value by software to calculate the content of the polymer end groups.

2. The automatic analysis method for polymer end groups according to claim 1, wherein the aromatic compound in step (2) comprises at least one selected from the group consisting of phenol, o-cresol, m-cresol, p-cresol, o-chlorophenol, m-chlorophenol, p-chlorophenol, 2,6-xylenol, catechol, resorcinol, hydroquinone, pyrogallol, and benzyl alcohol.

3. The automatic analysis method for polymer end groups according to claim 1, wherein the solvent in step (2) further comprises at least one auxiliary solvent selected from the group consisting of chloroform, dichloromethane, and isopropanol.

4. The automatic analysis method for polymer end groups according to claim 3, wherein the mixing ratio of the aromatic compound to the auxiliary solvent is 5:1 to 1:

5.

5. The automatic analysis method for polymer end groups according to claim 1, wherein the heating in step (2) is carried out at a temperature of 60°C to 100°C for 400 seconds to 900 seconds.

6. The automatic analysis method for polymer end groups according to claim 1, wherein the cooling in step (3) is carried out by injecting at least one cooling solvent selected from the group consisting of chloroform, dichloromethane, and isopropanol into the polymer sample solution.

7. The automatic analysis method for polymer end groups according to claim 6, wherein the heating rod for heating the polymer sample into which the solvent is injected is cleaned with the cooling solvent in step (3).

8. The automatic analysis method for polymer end groups according to claim 1, wherein the indicator in step (4) further comprises at least one selected from the group consisting of bromophenol blue, phenol red, and methyl red.

9. The automatic analysis method for polymer end groups according to claim 1, wherein the titrant in step (4) further comprises at least one selected from the group consisting of sodium hydroxide (NaOH) and potassium hydroxide (KOH).

10. The automatic analysis method for polymer end groups according to claim 1 further comprises step (6), which cleans the colorimetric electrode in step (4) by providing a cleaning solvent.

11. The automatic analysis method for polymer end groups according to claim 10, wherein the cleaning solvent comprises at least one selected from the group consisting of acetone, acetonitrile, isopropanol, and water.

12. The automatic analysis method for polymer end groups according to claim 1, wherein the polymer is a polymer containing a carboxyl group.

13. The automatic analysis method for polymer end groups according to claim 1, wherein the end group is a carboxyl group (COOH).

14. An automatic analysis system for polymer end groups, which comprises: A sample supply unit, which includes an automatic sampler, in which a container containing a polymer sample is installed; A heating unit, which includes a solvent injection tube for injecting a solvent containing an aromatic compound having at least one hydroxyl group into the container containing the polymer sample, a heating rod for heating the polymer sample injected with the solvent, and a cooling solvent injection tube for injecting a cooling solvent to cool the polymer sample solution obtained by heating; A titration unit, which includes an indicator injection tube for injecting an indicator into the polymer sample solution cooled by the cooling solvent, a titrant injection tube for injecting a titrant into the polymer sample solution into which the indicator has been injected, and a colorimetric electrode, which displays a change in the potential value determined by the amount of the injected titrant; A dispensing control unit, which includes a solvent dispenser for dispensing a solvent into the solvent injection tube, an indicator dispenser for dispensing an indicator into the indicator injection tube, and a titrant dispenser for dispensing a titrant into the titrant injection tube; A pump control unit, which includes a solvent supply pump for supplying a solvent to the solvent dispenser, and a cooling solvent supply pump for supplying a cooling solvent to the cooling solvent injection tube; and An automatic data processing unit, which includes software for analyzing the change in the potential value, and an output device for outputting the analysis result obtained by the software.

15. The automatic analysis system for polymer end groups according to claim 14, wherein the container containing the polymer sample is a disposable container.

16. The automatic analysis system for polymer end groups according to claim 14, wherein the solvent further includes at least one auxiliary solvent selected from the group consisting of chloroform, dichloromethane, and isopropanol.

17. The automatic analysis system for polymer end groups according to claim 14, wherein the colorimetric electrode is a photometric sensor electrode (optrode).

18. The automatic analysis system for polymer end groups according to claim 14, wherein the titration unit further includes a cleaning solvent injection tube for injecting a cleaning solvent to clean the colorimetric electrode; and The pump control unit further includes a cleaning solvent supply pump, which supplies the cleaning solvent to the cleaning solvent injection tube.

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