Normal-temperature one-step method PMMA plate polymerization method, PMMA plate and application
Through the one-step PMMA plate polymerization method in the room temperature method, the problems of polymerization rate increase and unevenness during the PMMA polymerization process were solved, and the preparation of PMMA plates with high yield and low molecular weight distribution was achieved, which was suitable for the fields of construction and advertising display.
Patent Information
- Application Number
- CN202411453190.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-17
- Publication Date
- 2024-12-27
AI Technical Summary
During the PMMA polymerization process, the polymerization rate increases when the monomer reaches 20%, resulting in uneven polymerization and local explosive polymerization, low yield and wide molecular weight distribution, and improved polymerization process is needed.
The PMMA plate polymerization method is adopted in a room temperature one-step method, including prepolymerization, casting molding and polymerization curing steps. By stirring and mixing the prepolymer at 25°C to 40°C, selecting the appropriate rotation speed and time, using MA monomer, toluene, BPO, Components such as dodecyl mercaptan and carbohol are controlled to improve yield and uniformity.
The preparation of PMMA sheets with high yields at room temperature is achieved, which reduces energy consumption, improves polymerization uniformity, reduces molecular weight distribution and improves yield.
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Figure BDA0005089727320000051 
Figure BDA0005089727320000061
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of PMMA sheets, and in particular to a one-step PMMA sheet polymerization method at room temperature, a PMMA sheet and applications. Background Art
[0002] PMMA, also known as polymethyl methacrylate, has good mechanical properties and high light transmittance, and is often used in the construction industry and advertising display industry.
[0003] PMMA is obtained by polymerization of MMA. However, during the polymerization process, when the monomer reaches 20%, the polymerization rate increases and the viscosity increases rapidly, resulting in uneven polymerization of various parts and even local explosions. The yield of the prepared PMMA is not high and the molecular weight distribution is wide. Therefore, it is necessary to improve the polymerization process of PMMA. Summary of the invention
[0004] In order to solve at least one of the above technical problems and develop a PMMA plate polymerization method with higher yield and lower molecular weight distribution, the present application provides a room temperature one-step PMMA plate polymerization method, a PMMA plate and its application.
[0005] On the one hand, the present application provides a one-step PMMA plate polymerization method at room temperature, comprising the following steps:
[0006] S1. Pre-polymerization
[0007] Mixing MMA monomer, comonomer, solvent, initiator, chain transfer agent and release agent, stirring and prepolymerizing at 25°C to 40°C to form a prepolymer;
[0008] S2, casting
[0009] The prepolymer prepared in S1 is poured into a mold and cast into a mold;
[0010] S3, polymerization and curing
[0011] The mold is placed at a temperature of 25°C to 40°C and stirred first, and then polymerized and cured to obtain a PMMA plate.
[0012] Optionally, in the prepolymerization in S1, the stirring speed is 100-120 r / min, and the prepolymerization time is 2-3 h.
[0013] Optionally, during the casting step S2, a negative pressure is set inside the mold.
[0014] Optionally, in the S3, polymerization curing, the polymerization time is 8 to 12 hours, the stirring speed is 15 to 30 r / min, and the stirring time is 1 to 2 hours.
[0015] Optionally, the comonomer is MA monomer.
[0016] Optionally, the solvent is toluene, xylene or a combination of both.
[0017] Optionally, the initiator is BPO or DBPO.
[0018] Optionally, the chain transfer agent is dodecyl mercaptan.
[0019] Optionally, the release agent is octadecyl alcohol.
[0020] In a second aspect, the present application provides a PMMA plate prepared by the above-mentioned preparation method.
[0021] In a third aspect, the present application provides the application of the above-mentioned PMMA board in the fields of construction and advertising display.
[0022] In summary, the present application improves the preparation method of PMMA sheets, which can be prepared at room temperature, greatly reducing energy consumption. In addition, polymerization at room temperature can reduce the viscosity of the material during the reaction process, improve polymerization uniformity, reduce molecular weight distribution, and improve yield. DETAILED DESCRIPTION
[0023] The present application is further described in detail below in conjunction with embodiments.
[0024] In the following examples of the present application, the main components involved, unless otherwise specified, were purchased from commercially available products.
[0025] In the following examples of the present application, MA monomer is exemplified as the comonomer; toluene is exemplified as the solvent; BPO is exemplified as the initiator; dodecyl mercaptan is exemplified as the chain transfer agent; and octadecanol is exemplified as the release agent. Specific embodiments
[0027] Example 1
[0028] This embodiment is used to prepare a PMMA plate, and the details are as follows.
[0029] 1000g MMA monomer, 10g MA monomer, 300g toluene, 5g BPO, 0.5g dodecyl mercaptan and 0.1g octadecanol were mixed, stirred at 30r / min for 1h at 25°C, and prepolymerized to form a prepolymer; the prepolymer prepared above was poured into a mold and cast; the mold was placed at 25°C and stirred at 30r / min for 1h, and then polymerized and cured for 8h to obtain a PMMA plate.
[0030] Example 2
[0031] This embodiment is used to prepare a PMMA plate, and the details are as follows.
[0032] 1000g MMA monomer, 10g MA monomer, 300g toluene, 5g BPO, 0.5g dodecyl mercaptan and 0.1g octadecanol were mixed, stirred at 20r / min for 1.5h at 25°C, and prepolymerized to form a prepolymer; the prepolymer prepared above was poured into a mold and cast; the mold was placed at 25°C and stirred at 20r / min for 1.5h, and then polymerized and cured for 8h to obtain a PMMA plate.
[0033] Example 3
[0034] This embodiment is used to prepare a PMMA plate, and the details are as follows.
[0035] 1000g MMA monomer, 10g MA monomer, 300g toluene, 5g BPO, 0.5g dodecyl mercaptan and 0.1g octadecanol were mixed, stirred at 15r / min for 2h at 25°C, and prepolymerized to form a prepolymer; the prepolymer prepared above was poured into a mold and cast; the mold was placed at 25°C and stirred at 15r / min for 2h, and then polymerized and cured for 8h to obtain a PMMA plate.
[0036] Example 4
[0037] This embodiment is used to prepare a PMMA plate, and the details are as follows.
[0038] 1000g MMA monomer, 10g MA monomer, 300g toluene, 5g BPO, 0.5g dodecyl mercaptan and 0.1g octadecanol were mixed, stirred at 100r / min for 3h at 25°C, and prepolymerized to form a prepolymer; the prepolymer prepared above was poured into a mold and cast; the mold was placed at 25°C and stirred at 120r / min for 2h, and then polymerized and cured for 8h to obtain a PMMA plate.
[0039] Example 5
[0040] This embodiment is used to prepare a PMMA plate, and the details are as follows.
[0041] 1000g MMA monomer, 10g MA monomer, 300g toluene, 5g BPO, 0.5g dodecyl mercaptan and 0.1g octadecanol were mixed, stirred at 110r / min for 2.5h at 25°C, and prepolymerized to form a prepolymer; the prepolymer prepared above was poured into a mold and cast; the mold was placed at 25°C and stirred at 110r / min for 2.5h, and then polymerized and cured for 8h to obtain a PMMA plate.
[0042] Example 6
[0043] This embodiment is used to prepare a PMMA plate, and the details are as follows.
[0044] 1000g MMA monomer, 10g MA monomer, 300g toluene, 5g BPO, 0.5g dodecyl mercaptan and 0.1g octadecanol were mixed, stirred at 120r / min for 2h at 25°C, and prepolymerized to form a prepolymer; the prepolymer prepared above was poured into a mold and cast; the mold was placed at 25°C and stirred at 100r / min for 3h, and then polymerized and cured for 8h to obtain a PMMA plate.
[0045] Example 7
[0046] This embodiment is used to prepare a PMMA plate, and the details are as follows.
[0047] 1000g MMA monomer, 10g MA monomer, 300g toluene, 5g BPO, 0.5g dodecyl mercaptan and 0.1g octadecanol were mixed, stirred at 100r / min for 3h at 25°C, and prepolymerized to form a prepolymer; the prepolymer prepared above was poured into a mold and cast; the mold was placed at 25°C and stirred at 30r / min for 1h, and then polymerized and cured for 8h to obtain a PMMA plate.
[0048] Example 8
[0049] This embodiment is used to prepare a PMMA plate, and the details are as follows.
[0050] 1000g MMA monomer, 10g MA monomer, 300g toluene, 5g BPO, 0.5g dodecyl mercaptan and 0.1g octadecanol were mixed, stirred at 110r / min for 2.5h at 25°C, and prepolymerized to form a prepolymer; the prepolymer prepared above was poured into a mold and cast; the mold was placed at 25°C and stirred at 20r / min for 1.5h, and then polymerized and cured for 8h to obtain a PMMA plate.
[0051] Example 9
[0052] This embodiment is used to prepare a PMMA plate, and the details are as follows.
[0053] 1000g MMA monomer, 10g MA monomer, 300g toluene, 5g BPO, 0.5g dodecyl mercaptan and 0.1g octadecanol were mixed, stirred at 120r / min for 2h at 25°C, and prepolymerized to form a prepolymer; the prepolymer prepared above was poured into a mold and cast; the mold was placed at 25°C and stirred at 15r / min for 2h, and then polymerized and cured for 8h to obtain a PMMA plate.
[0054] The properties of the PMMA plates prepared in the above Examples 1 to 9 are shown in Table 1.
[0055] Table 1
[0056]
[0057]
[0058] It can be seen from the above Examples 1 to 9 and Table 1 that the technical solution of the present application can achieve a yield of more than 95% and a molecular weight distribution within a relatively low range at room temperature and when the total polymerization time is controlled within 13 hours.
[0059] Example 10
[0060] This embodiment is used to prepare a PMMA plate, and the details are as follows.
[0061] 1000g MMA monomer, 10g MA monomer, 300g toluene, 5g BPO, 0.5g dodecyl mercaptan and 0.1g octadecanol were mixed, stirred at 30r / min for 1h at 25°C, and prepolymerized to form a prepolymer; the prepolymer prepared above was poured into a mold and cast; the mold was placed at 25°C and stirred at 30r / min for 1h, and then polymerized and cured for 9h to obtain a PMMA plate.
[0062] Embodiment 11
[0063] This embodiment is used to prepare a PMMA plate, and the details are as follows.
[0064] 1000g MMA monomer, 10g MA monomer, 300g toluene, 5g BPO, 0.5g dodecyl mercaptan and 0.1g octadecanol were mixed, stirred at 20r / min for 1.5h at 25°C, and prepolymerized to form a prepolymer; the prepolymer prepared above was poured into a mold and cast; the mold was placed at 25°C and stirred at 20r / min for 1.5h, and then polymerized and cured for 9h to obtain a PMMA plate.
[0065] Example 12
[0066] This embodiment is used to prepare a PMMA plate, and the details are as follows.
[0067] 1000g MMA monomer, 10g MA monomer, 300g toluene, 5g BPO, 0.5g dodecyl mercaptan and 0.1g octadecanol were mixed, stirred at 15r / min for 2h at 25°C, and prepolymerized to form a prepolymer; the prepolymer prepared above was poured into a mold and cast; the mold was placed at 25°C and stirred at 15r / min for 2h, and then polymerized and cured for 9h to obtain a PMMA plate.
[0068] Embodiment 13
[0069] This embodiment is used to prepare a PMMA plate, and the details are as follows.
[0070] 1000g MMA monomer, 10g MA monomer, 300g toluene, 5g BPO, 0.5g dodecyl mercaptan and 0.1g octadecanol were mixed, stirred at 100r / min for 3h at 25°C, and prepolymerized to form a prepolymer; the prepolymer prepared above was poured into a mold and cast; the mold was placed at 25°C and stirred at 120r / min for 2h, and then polymerized and cured for 9h to obtain a PMMA plate.
[0071] Embodiment 14
[0072] This embodiment is used to prepare a PMMA plate, and the details are as follows.
[0073] 1000g MMA monomer, 10g MA monomer, 300g toluene, 5g BPO, 0.5g dodecyl mercaptan and 0.1g octadecanol were mixed, stirred at 110r / min for 2.5h at 25°C, and prepolymerized to form a prepolymer; the prepolymer prepared above was poured into a mold and cast; the mold was placed at 25°C and stirred at 110r / min for 2.5h, and then polymerized and cured for 9h to obtain a PMMA plate.
[0074] Embodiment 15
[0075] This embodiment is used to prepare a PMMA plate, and the details are as follows.
[0076] 1000g MMA monomer, 10g MA monomer, 300g toluene, 5g BPO, 0.5g dodecyl mercaptan and 0.1g octadecanol were mixed, stirred at 120r / min for 2h at 25°C, and prepolymerized to form a prepolymer; the prepolymer prepared above was poured into a mold and cast; the mold was placed at 25°C and stirred at 100r / min for 3h, and then polymerized and cured for 9h to obtain a PMMA plate.
[0077] Example 16
[0078] This embodiment is used to prepare a PMMA plate, and the details are as follows.
[0079] 1000g MMA monomer, 10g MA monomer, 300g toluene, 5g BPO, 0.5g dodecyl mercaptan and 0.1g octadecanol were mixed, stirred at 100r / min for 3h at 25°C, and prepolymerized to form a prepolymer; the prepolymer prepared above was poured into a mold and cast; the mold was placed at 25°C and stirred at 30r / min for 1h, and then polymerized and cured for 9h to obtain a PMMA plate.
[0080] Embodiment 17
[0081] This embodiment is used to prepare a PMMA plate, and the details are as follows.
[0082] 1000g MMA monomer, 10g MA monomer, 300g toluene, 5g BPO, 0.5g dodecyl mercaptan and 0.1g octadecanol were mixed, stirred at 110r / min for 2.5h at 25°C, and prepolymerized to form a prepolymer; the prepolymer prepared above was poured into a mold and cast; the mold was placed at 25°C and stirred at 20r / min for 1.5h, and then polymerized and cured for 9h to obtain a PMMA plate.
[0083] Embodiment 18
[0084] This embodiment is used to prepare a PMMA plate, and the details are as follows.
[0085] 1000g MMA monomer, 10g MA monomer, 300g toluene, 5g BPO, 0.5g dodecyl mercaptan and 0.1g octadecanol were mixed, stirred at 120r / min for 2h at 25°C, and prepolymerized to form a prepolymer; the prepolymer prepared above was poured into a mold and cast; the mold was placed at 25°C and stirred at 15r / min for 2h, and then polymerized and cured for 9h to obtain a PMMA plate.
[0086] The properties of the PMMA plates prepared in the above Examples 10 to 18 are shown in Table 2.
[0087] Table 2
[0088] PMMA Sheet Yield / % Molecular weight distribution Example 10 97.6 1.93 Embodiment 11 96.7 1.65 Example 12 96.4 1.8 Embodiment 13 98.2 2.61 Embodiment 14 98.5 2.48 Embodiment 15 97.9 2.37 Example 16 98.9 1.87 Embodiment 17 99.3 1.64 Embodiment 18 99.1 1.83
[0089] It can be seen from Examples 10 to 18 and Table 2 that after the polymerization curing time is extended from 8 h to 9 h in the technical solution of the present application, the yield is further improved, but the molecular weight distribution also becomes higher.
[0090] By comparing Examples 10 to 12 with Examples 1 to 3, it can be found that when the rotation speed is 15 to 30 r / min and the stirring time is 1 to 2 h in the prepolymerization; when the polymerization curing is performed at a stirring speed of 15 to 30 r / min and a stirring time of 1 to 2 h, the yield is lower than that of other embodiments, but the molecular weight distribution is relatively low, and after extending the polymerization curing time from 8 h to 9 h, the yield is further improved, but the molecular weight distribution does not change much.
[0091] Therefore, in the technical solution of the present application, when the rotation speed is 15 to 30 r / min and the stirring time is 1 to 2 h during prepolymerization; and during polymerization and curing, the polymerization stirring speed is 15 to 30 r / min and the stirring time is 1 to 2 h, it is necessary to further extend the polymerization and curing time to obtain a higher yield while keeping the molecular weight distribution within a lower range.
[0092] By comparing Examples 13 to 15 with Examples 4 to 6, it can be found that when the speed is 100 to 120 r / min and the time is 2 to 3 h in the prepolymerization; when the speed of the polymerization is 100 to 120 r / min and the time is 2 to 3 h in the polymerization curing, after the polymerization curing time is extended from 8 h to 9 h, the yield is significantly improved, but the molecular weight distribution is also significantly improved. In practical applications, whether to extend the polymerization curing time can be selected according to the actual needs of customers as well as cost and time control.
[0093] By comparing Examples 16 to 18 with Examples 7 to 9, it can be found that when the speed is 100 to 120 r / min and the time is 2 to 3 h in the prepolymerization; during the polymerization and curing, the speed of the polymerization stirring is 15 to 30 r / min and the stirring time is 1 to 2 h, the yield is higher than that of other embodiments, and the molecular weight distribution is relatively low. After the polymerization and curing time is extended from 8 h to 9 h, the yield increase is small, but the molecular weight distribution does not change much; therefore, the polymerization and curing time can be set to 8 h to reduce the time cost; but when a product with a higher yield is required, the polymerization and curing time can be extended to obtain a higher yield, and the molecular weight distribution is still low.
[0094] Embodiment 19
[0095] This embodiment is used to prepare a PMMA plate, and the details are as follows.
[0096] 1000g MMA monomer, 10g MA monomer, 300g toluene, 5g BPO, 0.5g dodecyl mercaptan and 0.1g octadecanol were mixed, stirred at 30r / min for 1h at 25°C, and prepolymerized to form a prepolymer; the prepolymer prepared above was poured into a mold and cast; the mold was placed at 25°C and stirred at 30r / min for 1h, and then polymerized and cured for 10h to obtain a PMMA plate.
[0097] Embodiment 20
[0098] This embodiment is used to prepare a PMMA plate, and the details are as follows.
[0099] 1000g MMA monomer, 10g MA monomer, 300g toluene, 5g BPO, 0.5g dodecyl mercaptan and 0.1g octadecanol were mixed, stirred at 20r / min for 1.5h at 25°C, and prepolymerized to form a prepolymer; the prepolymer prepared above was poured into a mold and cast; the mold was placed at 25°C and stirred at 20r / min for 1.5h, and then polymerized and cured for 10h to obtain a PMMA plate.
[0100] Embodiment 21
[0101] This embodiment is used to prepare a PMMA plate, and the details are as follows.
[0102] 1000g MMA monomer, 10g MA monomer, 300g toluene, 5g BPO, 0.5g dodecyl mercaptan and 0.1g octadecanol were mixed, stirred at 15r / min for 2h at 25°C, and prepolymerized to form a prepolymer; the prepolymer prepared above was poured into a mold and cast; the mold was placed at 25°C and stirred at 15r / min for 2h, and then polymerized and cured for 10h to obtain a PMMA plate.
[0103] Embodiment 22
[0104] This embodiment is used to prepare a PMMA plate, and the details are as follows.
[0105] 1000g MMA monomer, 10g MA monomer, 300g toluene, 5g BPO, 0.5g dodecyl mercaptan and 0.1g octadecanol were mixed, stirred at 100r / min for 3h at 25°C, and prepolymerized to form a prepolymer; the prepolymer prepared above was poured into a mold and cast; the mold was placed at 25°C and stirred at 120r / min for 2h, and then polymerized and cured for 10h to obtain a PMMA plate.
[0106] Embodiment 23
[0107] This embodiment is used to prepare a PMMA plate, and the details are as follows.
[0108] 1000g MMA monomer, 10g MA monomer, 300g toluene, 5g BPO, 0.5g dodecyl mercaptan and 0.1g octadecanol were mixed, stirred at 110r / min for 2.5h at 25°C, and prepolymerized to form a prepolymer; the prepolymer prepared above was poured into a mold and cast; the mold was placed at 25°C and stirred at 110r / min for 2.5h, and then polymerized and cured for 10h to obtain a PMMA plate.
[0109] Embodiment 24
[0110] This embodiment is used to prepare a PMMA plate, and the details are as follows.
[0111] 1000g MMA monomer, 10g MA monomer, 300g toluene, 5g BPO, 0.5g dodecyl mercaptan and 0.1g octadecanol were mixed, stirred at 120r / min for 2h at 25°C, and prepolymerized to form a prepolymer; the prepolymer prepared above was poured into a mold and cast; the mold was placed at 25°C and stirred at 100r / min for 3h, and then polymerized and cured for 10h to obtain a PMMA plate.
[0112] Embodiment 25
[0113] This embodiment is used to prepare a PMMA plate, and the details are as follows.
[0114] 1000g MMA monomer, 10g MA monomer, 300g toluene, 5g BPO, 0.5g dodecyl mercaptan and 0.1g octadecanol were mixed, stirred at 100r / min for 3h at 25°C, and prepolymerized to form a prepolymer; the prepolymer prepared above was poured into a mold and cast; the mold was placed at 25°C and stirred at 30r / min for 1h, and then polymerized and cured for 10h to obtain a PMMA plate.
[0115] Embodiment 26
[0116] This embodiment is used to prepare a PMMA plate, and the details are as follows.
[0117] 1000g MMA monomer, 10g MA monomer, 300g toluene, 5g BPO, 0.5g dodecyl mercaptan and 0.1g octadecanol were mixed, stirred at 110r / min for 2.5h at 25°C, and prepolymerized to form a prepolymer; the prepolymer prepared above was poured into a mold and cast; the mold was placed at 25°C and stirred at 20r / min for 1.5h, and then polymerized and cured for 10h to obtain a PMMA plate.
[0118] Embodiment 27
[0119] This embodiment is used to prepare a PMMA plate, and the details are as follows.
[0120] 1000g MMA monomer, 10g MA monomer, 300g toluene, 5g BPO, 0.5g dodecyl mercaptan and 0.1g octadecanol were mixed, stirred at 120r / min for 2h at 25°C, and prepolymerized to form a prepolymer; the prepolymer prepared above was poured into a mold and cast; the mold was placed at 25°C and stirred at 15r / min for 2h, and then polymerized and cured for 10h to obtain a PMMA plate.
[0121] The properties of the PMMA plates prepared in Examples 19 to 27 are shown in Table 3.
[0122] Table 3
[0123] PMMA Sheet Yield / % Molecular weight distribution Embodiment 19 98.1 1.95 Embodiment 20 97.3 1.67 Embodiment 21 97.1 1.83 Embodiment 22 98.5 2.77 Embodiment 23 99.1 2.63 Embodiment 24 98.3 2.51 Embodiment 25 99.0 1.88 Embodiment 26 99.5 1.65 Embodiment 27 99.3 1.85
[0124] By comparing Examples 19 to 21 with Examples 10 to 12, it can be found that when the rotation speed is 15 to 30 r / min and the stirring time is 1 to 2 h in the prepolymerization; when the polymerization curing is performed at a stirring speed of 15 to 30 r / min and a stirring time of 1 to 2 h, the yield is lower than that of other embodiments, but the molecular weight distribution is relatively low, and after extending the polymerization curing time from 9 h to 10 h, the yield is further improved, but the molecular weight distribution does not change much.
[0125] Therefore, in the technical solution of the present application, when the rotation speed is 15 to 30 r / min and the stirring time is 1 to 2 h during prepolymerization; and during polymerization and curing, the polymerization stirring speed is 15 to 30 r / min and the stirring time is 1 to 2 h, it is necessary to further extend the polymerization and curing time to obtain a higher yield while keeping the molecular weight distribution within a lower range.
[0126] By comparing Examples 22 to 24 with Examples 13 to 15, it can be found that when the rotation speed is 100 to 120 r / min and the time is 2 to 3 h in the prepolymerization; when the polymerization curing time is 100 to 120 r / min and the time is 2 to 3 h, after the polymerization curing time is extended from 9 h to 10 h, the yield is significantly improved, but the molecular weight distribution is also significantly improved. In practical applications, whether to extend the polymerization curing time can be selected according to the actual needs of customers as well as cost and time control.
[0127] By comparing Examples 25 to 27 with Examples 16 to 18, it can be found that when the rotation speed is 100 to 120 r / min and the time is 2 to 3 h in the prepolymerization; during the polymerization and curing, the stirring speed is 15 to 30 r / min and the stirring time is 1 to 2 h, the yield is higher than that of other embodiments and the molecular weight distribution is relatively low. After extending the polymerization and curing time from 9 h to 10 h, the yield increase is small, but the molecular weight distribution does not change much.
[0128] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.
Claims
1. A one-step PMMA plate polymerization method at room temperature, characterized in that: The following steps are involved: S1. Pre-polymerization Mixing MMA monomer, comonomer, solvent, initiator, chain transfer agent and release agent, stirring and prepolymerizing at 25°C to 40°C to form a prepolymer; S2, casting The prepolymer prepared in S1 is poured into a mold and cast into a mold; S3, polymerization and curing The mold is placed at a temperature of 25°C to 40°C and stirred first, and then polymerized and cured to obtain a PMMA plate.
2. The one-step PMMA plate polymerization method at room temperature according to claim 1, characterized in that: In the above S1, prepolymerization, the stirring speed is 100-120 r / min, and the prepolymerization time is 2-3 h.
3. The room temperature one-step PMMA plate polymerization method according to claim 1, characterized in that: In the above-mentioned S3, polymerization curing, the polymerization time is 8 to 12 hours, the stirring speed is 15 to 30 r / min, and the stirring time is 1 to 2 hours.
4. The one-step PMMA plate polymerization method at room temperature according to claim 1, characterized in that: The comonomer is MA monomer.
5. The one-step PMMA plate polymerization method at room temperature according to claim 1, characterized in that: The solvent is toluene, xylene or a combination of the two.
6. The one-step PMMA plate polymerization method at room temperature according to claim 1, characterized in that: The initiator is BPO or DBPO.
7. The one-step PMMA plate polymerization method at room temperature according to claim 1, characterized in that: The chain transfer agent is dodecyl mercaptan.
8. The one-step PMMA plate polymerization method at room temperature according to claim 1, characterized in that: The release agent is octadecyl alcohol.
9. A PMMA plate, characterized in that: The product is prepared by the preparation method described in claim 1.
10. Use of the PMMA board according to claim 9 in the fields of construction and advertising display.