Resin composition and molded article containing same

Abstract

The present invention relates to a polyalkylene carbonate / graft copolymer resin composition having improved elongation properties and surface properties, and a molded article containing the same. The resin composition includes a polyalkylene carbonate resin containing end-capping moieties and a graft copolymer, wherein the end-capping moieties are units derived from one or more selected from maleic anhydride, 4-t-octylphenol, 2-naphthol, 4-n-butoxyphenol, 4-phenylphenol, 4-(benzyloxy)phenol, and 4-t-butylphenol, and the molded article containing the same is provided.

Description

[Technical Field]

[0001] This application claims the benefit of priority based on Korean Patent Application No. 10-2023-0008271, filed January 19, 2023, the entire contents of which are incorporated herein by reference.

[0002] The present invention relates to a polyalkylene carbonate / graft copolymer resin composition having improved moldability, elongation properties and surface properties, and to a molded article containing the same. [Background technology]

[0003] Polyalkylene carbonate (PAC) is a resin made using carbon capturing utilization (CCU), a technology that uses carbon dioxide, a major source of greenhouse gases, as a raw material. It is used in a variety of everyday products due to its excellent flexibility, transparency, barrier properties, and clean burning.

[0004] However, polyalkylene carbonate is poor in heat resistance, strength, and moldability, making it difficult to use alone, and is used by blending with other resins such as ABS and then extrusion molding.

[0005] On the other hand, ABS has poor weather resistance due to the double bonds in butadiene, and there is a high risk of yellowing over long-term use, making it difficult to incorporate a high content into a composition.

[0006] Furthermore, polyalkylene carbonate and ABS are not very compatible with each other, which can lead to phase separation and make it difficult to maintain desired levels of physical properties.

[0007] Therefore, it is necessary to develop a resin composition that improves compatibility when blending polyalkylene carbonate and ABS, does not deteriorate the excellent physical properties of ABS, and has improved yellowing properties and surface texture. [Prior art documents] [Patent documents]

[0008] [Patent Document 1] KR10-2013-0000031A (January 2, 2013) Summary of the Invention [Problem to be solved by the invention]

[0009] The present invention has been devised to solve the problems of the prior art, and aims to provide a resin composition that has excellent compatibility, resulting in improved molding processability, does not reduce the excellent physical properties (such as tensile strength) of the graft copolymer, and has improved elongation and surface properties.

[0010] Another object of the present invention is to provide a molded article containing the resin composition, which is produced using the resin composition. [Means for solving the problem]

[0011] In order to solve the above problems, the present invention provides a resin composition and a molded article.

[0012] (1) The present invention provides a resin composition comprising a polyalkylene carbonate resin containing an end-capping moiety and a graft copolymer, wherein the end-capping moiety is a unit derived from one or more selected from maleic anhydride, 4-t-octylphenol, 2-naphthol, 4-n-butoxyphenol, 4-phenylphenol, 4-(benzyloxy)phenol, and 4-t-butylphenol.

[0013] (2) The present invention provides the resin composition according to (1) above, wherein the end-capping moiety is a unit derived from maleic anhydride.

[0014] (3) The present invention provides a resin composition according to (1) or (2) above, wherein the polyalkylene carbonate resin contains 0.5% by weight to 2.0% by weight of a terminal capping moiety.

[0015] (4) The present invention provides a resin composition according to any one of the above (1) to (3), wherein the weight ratio of the polyalkylene carbonate resin to the graft copolymer is 1:0.5-9.

[0016] (5) The present invention provides a resin composition according to any one of (1) to (4) above, wherein the graft copolymer comprises a conjugated diene rubber core and a shell containing units derived from an aromatic vinyl monomer and units derived from a vinyl cyanide monomer.

[0017] (6) The present invention provides a resin composition according to (5), wherein the graft copolymer comprises 30% by weight to 70% by weight of a conjugated diene rubber core and 30% by weight to 70% by weight of a shell containing units derived from an aromatic vinyl monomer and units derived from a vinylcyan monomer, and the shell contains 55% by weight to 85% by weight of units derived from an aromatic vinyl monomer and 15% by weight to 45% by weight of units derived from a vinylcyan monomer.

[0018] (7) The present invention provides a resin composition according to any one of the above (1) to (6), wherein the polyalkylene carbonate resin further contains units derived from an antioxidant.

[0019] (8) The present invention provides a resin composition according to any one of (1) to (7), wherein the polyalkylene carbonate resin has a heat resistance temperature of 230°C to 300°C and a melt viscosity measured at 190°C under a load of 2.16 kg of 1 g / 10 min to 25 g / 10 min.

[0020] (9) The present invention provides a resin composition according to any one of the above (1) to (8), wherein the resin composition further contains a compatibilizer.

[0021] (10) The present invention provides a molded article containing the resin composition according to any one of (1) to (9) above. [Effects of the Invention]

[0022] The resin composition according to the present invention contains a polyalkylene carbonate having a terminal capping portion and a graft copolymer, and therefore has excellent compatibility and improved molding processability, while maintaining the excellent mechanical properties of the graft copolymer, such as the tensile properties, and improving elongation and surface properties.

[0023] Furthermore, the molded article according to the present invention is produced from the resin composition described above, and by containing this, it is possible to achieve excellent mechanical properties, as well as excellent elongation and surface properties. DETAILED DESCRIPTION OF THE INVENTION

[0024] The present invention will now be described in more detail to aid in understanding the present invention.

[0025] The terms and words used in the description of the present invention and the claims should not be interpreted as being limited to their ordinary or dictionary meanings, but should be interpreted as meanings and concepts that are consistent with the technical idea of ​​the present invention, based on the principle that inventors can appropriately define the concepts of terms in order to best describe their inventions.

[0026] (Definition of terms) In the present invention, the term "derived unit" can refer to a component, structure derived from a compound or the compound itself.

[0027] As used herein, the term "composition" includes mixtures of materials comprising the composition as well as reaction products and decomposition products formed from the materials of the composition.

[0028] (Resin composition) The present invention provides a resin composition that is excellent in elongation and surface properties.

[0029] A resin composition according to one embodiment of the present invention includes a polyalkylene carbonate resin having an end-capping moiety and a graft copolymer, wherein the end-capping moiety is a unit derived from one or more selected from maleic anhydride, 4-t-octylphenol, 2-naphthol, 4-n-butoxyphenol, 4-phenylphenol, 4-(benzyloxy)phenol, and 4-t-butylphenol.

[0030] Polyalkylene carbonate (PAC) is a resin made from carbon dioxide, a major greenhouse gas, and is used in a variety of everyday necessities due to its excellent flexibility, transparency, barrier properties, and clean burning. However, its poor heat resistance, strength, and moldability make it difficult to use alone, and it is often blended with other resins, such as ABS, before being extruded. However, ABS has poor weather resistance due to the butadiene double bond, and is prone to yellowing over long-term use, making it difficult to incorporate high amounts into compositions. Furthermore, polyalkylene carbonate and ABS are not very compatible, which can lead to phase separation, making it difficult to maintain desired physical properties.

[0031] However, the resin composition of the present invention contains a polyalkylene carbonate whose ends have been modified with an end-capping agent, and therefore has the effect of providing excellent compatibility with ABS and improving elongation and surface properties.

[0032] Hereinafter, the resin composition of the present invention will be described in more detail, dividing it into each component.

[0033] (Polyalkylene carbonate resin) The polyalkylene carbonate resin according to the present invention has its terminals modified with a terminal capping agent, specifically, it is a resin having a structure in which the terminals of a polyalkylene carbonate are modified with a terminal capping agent and terminal capping moieties, which are units derived from the terminal capping agent, are bonded.

[0034] Generally, polyalkylene carbonates have a problem of low thermal stability due to the presence of carboxyl groups at the terminals of the carbonate groups, which leads to thermal decomposition at relatively low temperatures. However, the polyalkylene carbonate resin according to the present invention is a resin in which the terminals of the polyalkylene carbonate are modified with a terminal capping agent, i.e., the carboxyl groups in the polyalkylene carbonate are esterified with the terminal capping agent to form ester groups at the terminals. As a result, the polyalkylene carbonate resin exhibits a thermal decomposition temperature that is 50°C or more higher, specifically 60°C or more higher, than that of conventional polyalkylene carbonates.

[0035] Here, the end-capping moiety may be a unit derived from one or more selected from maleic anhydride, 4-t-octylphenol, 2-naphthol, 4-n-butoxyphenol, 4-phenylphenol, 4-(benzyloxy)phenol, and 4-t-butylphenol. Specifically, the end-capping moiety may be a unit derived from maleic anhydride.

[0036] Furthermore, the polyalkylene carbonate may contain 0.5 wt % to 2.0 wt %, specifically 0.5 wt % to 1.0 wt %, of end-capping moieties. In this case, the end-capping moieties act as an acid catalyst to promote hydrolysis of the resin, preventing deterioration of thermal stability and allowing the above-mentioned thermal stability improvement effect of end-capping to be fully exhibited.

[0037] The polyalkylene carbonate resin can have a heat-resistant temperature of 230°C to 300°C, specifically 250°C to 280°C.

[0038] The polyalkylene carbonate resin may have a melt flow index measured at 190°C under a load of 2.16 kg of 1 g / 10 min to 25 g / 10 min, specifically 1 g / 10 min to 15 g / 10 min, 1 g / 10 min to 10 g / 10 min, or 3 g / 10 min to 8 g / 10 min.

[0039] Furthermore, the polyalkylene carbonate resin according to one embodiment of the present invention may further include units derived from an antioxidant, if necessary. Here, the antioxidant is not particularly limited as long as it is commonly known in the art, and may be, for example, any one or more selected from the group consisting of phenol-based antioxidants, aromatic amine-based antioxidants, phosphorus-based antioxidants, and sulfur-based antioxidants.

[0040] Meanwhile, the polyalkylene carbonate resin having an end-capping moiety according to one embodiment of the present invention can be produced by extruding a polyalkylene carbonate, an end-capping agent, and optionally an antioxidant in the presence of a reaction initiator at a temperature of 170°C to 190°C. The extrusion reaction can be carried out using commonly known compounding equipment such as a twin-screw extruder, a single-screw extruder, a roll mill, a kneader, or a Banbury mixer.

[0041] Here, the polyalkylene carbonate used in the extrusion reaction is -COO-(CH2) n It is a polymer having a -CH2CH2O- (n is an integer of 2 to 12) repeating unit, and may be, for example, one or more selected from the group consisting of polyethylene carbonate, polypropylene carbonate, polypentene carbonate, polyhexene carbonate, polyoctene carbonate, and polycyclohexene carbonate, and specifically may be polyethylene carbonate or polypropylene carbonate.

[0042] The polyalkylene carbonate resin may have a weight average molecular weight of 10,000 g / mol to 1,000,000 g / mol, specifically 50,000 g / mol to 500,000 g / mol, or 100,000 g / mol to 200,000 g / mol.

[0043] The polyalkylene carbonate resin may be a copolymer or terpolymer prepared by copolymerizing an epoxide-based compound and carbon dioxide as monomers in an organic solvent in the presence of an organometallic catalyst. Here, the epoxide-based compound may be, for example, at least one selected from the group consisting of ethylene oxide, propylene oxide, 1-butene oxide, 2-butene oxide, isobutylene oxide, 1-pentene oxide, 2-pentene oxide, 1-hexene oxide, 1-octene oxide, cyclopentene oxide, cyclohexene oxide, styrene oxide, and butadiene monoxide. The carbon dioxide may be adjusted to 5 to 30 atmospheres, and the copolymerization may be performed at 20 to 120°C.

[0044] (graft copolymer) In the present invention, the graft copolymer may be an ABS resin, and specifically, the graft copolymer may include a conjugated diene rubber core and a shell containing units derived from an aromatic vinyl monomer and units derived from a vinylcyan monomer. Specifically, the graft copolymer may include 30% to 70% by weight of the conjugated diene rubber core and 30% to 70% by weight of the shell containing units derived from an aromatic vinyl monomer and units derived from a vinylcyan monomer, and the shell may include 55% to 85% by weight of units derived from an aromatic vinyl monomer and 15% to 45% by weight of units derived from a vinylcyan monomer. In this case, the impact resistance may be improved.

[0045] The graft copolymer may be prepared by graft polymerizing an aromatic vinyl monomer and a vinyl cyan monomer onto a conjugated diene rubber polymer. The conjugated diene rubber polymer may be a homopolymer of a conjugated diene monomer, a copolymer of a conjugated diene monomer and an aromatic vinyl monomer, or a copolymer of a conjugated diene monomer and a vinyl cyan monomer. The conjugated diene rubber polymer may be prepared by emulsion polymerizing monomers in the presence of a polymerization initiator and an emulsifier. The graft polymerization may be prepared by emulsion polymerizing a conjugated diene rubber polymer, an aromatic vinyl monomer, and a vinyl cyan monomer in the presence of a polymerization initiator and an emulsifier.

[0046] The conjugated diene monomer may be, for example, at least one selected from the group consisting of 1,3-butadiene, isoprene, 2,3-dimethyl-1,3-butadiene, and 2-phenyl-1,3-butadiene, and specifically, 1,3-butadiene.

[0047] The aromatic vinyl monomer may be, for example, at least one selected from the group consisting of styrene, α-methylstyrene, p-methylstyrene, o-ethylstyrene, p-ethylstyrene, and vinyltoluene, and specifically, styrene.

[0048] In addition, the vinylcyan-based monomer may be, for example, at least one selected from the group consisting of acrylonitrile, methacrylonitrile, and ethacrylonitrile, and specifically, acrylonitrile.

[0049] The emulsifier added during each emulsion polymerization may be selected from alkali salts of fatty acids, alkali salts of rosin acid, alkali salts of oleic acid, and combinations of two or more thereof. The polymerization initiator may be selected from sodium persulfate, potassium persulfate, cumene hydroperoxide, diisopropylbenzene hydroperoxide, and combinations of two or more thereof.

[0050] Furthermore, during the emulsion polymerization, a molecular weight modifier may be further added, if necessary.

[0051] (Resin composition) In the present invention, the resin composition may contain a polyalkylene carbonate resin and a graft copolymer in a weight ratio of 1:0.5-9, specifically, 1:1-9 or 1:2-5, in which case the elongation and tensile strength can be well balanced.

[0052] In addition, as the ratio of the polyalkylene carbonate resin increases, the elongation characteristics increase, but the tensile strength may deteriorate. The resin composition according to one embodiment of the present invention may include the polyalkylene carbonate resin and the graft copolymer in a ratio adjusted within the above range depending on the intended use.

[0053] Meanwhile, the resin composition according to one embodiment of the present invention may further include a compatibilizer, if necessary. The compatibilizer may be any substance commonly known in the art, and may be, for example, at least one selected from maleic anhydride, hexamethylene diisocyanate, methylene diphenyl diisocyanate, methyl methacrylate, and a styrene copolymer.

[0054] In addition, the resin composition may further include, as necessary, one or more additives selected from an antioxidant, an ultraviolet absorber, a flame retardant, an internal mold release agent, a lubricant, a light stabilizer, a mold release agent, a plasticizer, an antibacterial agent, an organic filler, an inorganic filler, a pigment, and a crosslinking agent.

[0055] (molded product) The present invention provides a molded article containing the resin composition, which is produced using the resin composition.

[0056] A molded article according to one embodiment of the present invention is produced by subjecting the resin composition to processing such as injection molding, and may be, for example, one or more selected from the group consisting of a film, a packaging material, an alignment film, an injection-molded article, a blow-molded article, a laminate, a tape, a nonwoven fabric, and a thread.

[0057] The molded article according to one embodiment of the present invention contains the resin composition, and thus can have excellent impact resistance, elongation, and surface properties.

[0058] While the present invention may be embodied in various different forms, it is to be understood that the invention is not limited to the specific embodiments set forth herein, and that the invention may be embodied in various different forms without departing from the spirit or scope of the present invention. [Example]

[0059] Information on the materials used in the Production Examples, Examples and Comparative Examples is as follows:

[0060] Polyethylene carbonate resin: Weight average molecular weight 146,889 g / mol, QPAC 25 (EMPOWER MATERIALS)

[0061] Graft copolymer: butadiene content 60% by weight, styrene:acrylonitrile 75:25 by weight ratio, HF380 (LG CHEM)

[0062] Manufacturing Example 1 100 parts by weight of polyethylene carbonate resin, 1 part by weight of maleic anhydride, and 0.1 part by weight of dicumyl peroxide were charged into a twin-screw extruder and subjected to an extrusion reaction at an extrusion temperature of 170°C to produce polyethylene carbonate resin containing end-capping moieties.

[0063] Manufacturing Example 2 A polyethylene carbonate resin containing end-capping moieties was produced in the same manner as in Production Example 1, except that 4-t-butylphenol was used instead of maleic anhydride.

[0064] Manufacturing Example 3 A polyethylene carbonate resin containing end-capping moieties was produced in the same manner as in Production Example 1, except that 4-t-butoxyphenol was used instead of maleic anhydride.

[0065] Example 1 The polyethylene carbonate resin having end-capping moieties prepared in Preparation Example 1 was mixed with the graft copolymer in a weight ratio of 1:4 to prepare a resin composition.

[0066] The resin composition was extruded at 200° C. using an extruder to obtain a pellet-shaped molded product.

[0067] Example 2 A resin composition and a molded article were produced in the same manner as in Example 1, except that the polyethylene carbonate resin containing end-capping moieties and the graft copolymer were mixed in a weight ratio of 1:1.5.

[0068] Example 3 A resin composition and a molded article were produced in the same manner as in Example 1, except that the polyethylene carbonate resin containing end-capping moieties and the graft copolymer were mixed in a weight ratio of 1:0.67.

[0069] Example 4 A resin composition and a molded article were produced in the same manner as in Example 1, except that the polyethylene carbonate resin containing the end-capping moieties produced in Production Example 2 was used.

[0070] Example 5 A resin composition and a molded article were produced in the same manner as in Example 1, except that the polyethylene carbonate resin containing the end-capping moieties produced in Production Example 3 was used.

[0071] Comparative Example 1 The graft copolymer was extruded at 200°C using an extruder to obtain a pellet-shaped molded product.

[0072] Comparative Example 2 A resin composition and a molded article were produced in the same manner as in Example 1, except that polyethylene carbonate (QPAC 25, EMPOWER MATERIALS) was used instead of the polyethylene carbonate resin containing end-capping moieties produced in Production Example 1.

[0073] Experimental Example 1 To confirm whether the modified polyethylene carbonates containing end-capping moieties prepared in Preparation Examples 1 to 3 were modified, the thermal decomposition temperature and melt index were compared with those of the polyalkylene carbonate used as the raw material (Preparation Example). The results are shown in Table 1 below.

[0074] (1) Thermal decomposition temperature (Td, °C) The thermal decomposition temperature was measured using a thermogravimetric analyzer (TGA, Thermogravimetric Analyzer with Large Furnace (LF), Mettler Toledo) at a temperature increase of 10°C / min from 30°C to 400°C, at which the weight loss rate was 1.0%.

[0075] (2) Melt index (MFI, g / 10 min) Using a fluidity tester, the sample was preheated for 6 minutes at a temperature of 190°C under a load of 2.16 kg, and then the measurement was carried out.

[0076] [Table 1]

[0077] From Table 1, it can be seen that Preparation Examples 1 to 3 have higher thermal decomposition temperatures and melt indices than the polyethylene carbonate resin of Comparative Preparation Example, and therefore it can be confirmed that the polyethylene carbonate resins of Preparation Examples 1 to 3 containing end-capping moieties have modified ends.

[0078] Experimental Example 2 The melt index of the resin compositions produced in the examples and comparative examples, and the tensile strength, elongation and whiteness of the test pieces obtained from the resin compositions were measured, and the results are shown in Tables 2 and 3 below.

[0079] (1) Melt index Each resin composition was preheated for 6 minutes using a flowability tester under conditions of a temperature of 200°C and a load of 5 kg, and then the measurement was carried out.

[0080] On the other hand, in the case of Comparative Example 1, the melt index of the graft copolymer was measured.

[0081] (2) Tensile strength (MPa) and elongation (%) According to ASTM D412, each molded product was cut into three dumbbell-shaped test pieces, and the tensile strength was measured at a speed of 50 mm / min using a UTM (Universal Testing Machine, manufactured by Instron). Each measurement was carried out three times, and the average value was obtained.

[0082] According to ASTM D638, each molded article was cut into three dumbbell-shaped test pieces, and the elongation at the time when each test piece was broken was measured under the same conditions as in the tensile strength measurement. Each measurement was carried out three times, and the average value was obtained as the result.

[0083] (3) Whiteness Each molded product was heated to 170°C to form a thin film (30 μm thick), and test specimens measuring 100 mm x 100 mm (width x length) were prepared. The whiteness index of each test specimen was measured using an UltraScan PRO model in accordance with CIE STM 1979.

[0084] [Mathematical formula 1] Whiteness (WI)=Ya(x-xn)-b(y-yn)

[0085] In Equation 1, Y is the luminance factor, x and y are the chromaticity coordinates of the object to be measured, xn and yn are the chromaticity coordinates of a perfect reflector (reflectance=100%), a=800, b=1700.

[0086] On the other hand, a completely white object has a WI of 100, but if treated with a fluorescent whitening agent, the WI can increase to 150. The higher the whiteness value of an object, the higher the whiteness it has.

[0087] [Table 2]

[0088] In Table 2, the elongation and whiteness of Examples 1 to 5 were obtained by the above-mentioned methods and then indexed (percentage) based on the result of Comparative Example 1.

[0089] [Table 3]

[0090] In Table 3, the tensile strength and whiteness of Examples 1 to 5 were obtained by the above-mentioned methods, and then indexed (percentage) based on the result of Comparative Example 2.

[0091] From Table 2 above, it was confirmed that the resin compositions of Examples 1 to 5 had an MFI of 3.0 to 9.6, which was more than twice as high as that of Comparative Example 1, and that the elongation and whiteness were greatly improved.

[0092] Furthermore, from Table 3 above, it was confirmed that the resin compositions of Examples 1 to 5 had an MFI that was more than twice as high as that of Comparative Example 2, had the same level of whiteness, and had a significant improvement in tensile strength.

[0093] Here, Comparative Example 1 is a graft copolymer and a molded article obtained therefrom, and Comparative Example 2 is the same resin composition as in Example 1 except that it contains polyethylene carbonate without end-capping moieties and a molded article obtained therefrom.

[0094] On the other hand, polyalkylene carbonate (PAC) has excellent flexibility and transparency, but poor heat resistance, strength, and moldability, making it difficult to use alone. Therefore, it is generally blended with other resins, such as graft copolymers (ABS), and then extruded. However, graft copolymers (ABS) have a high risk of yellowing, making it difficult to incorporate them at high concentrations into compositions. Furthermore, polyalkylene carbonate and graft copolymers (ABS) are not very compatible, making it difficult to achieve the desired level of physical properties. These problems can be seen in Comparative Example 1, which exhibits poor MFI, elongation, and whiteness, and Comparative Example 2, which exhibits poor MFI and whiteness.

[0095] However, as can be seen from Tables 2 and 3, the resin compositions of Examples 1 to 5 according to one embodiment of the present invention exhibited significantly improved MFI and also generally excellent properties in terms of tensile strength, elongation, and whiteness. The above results indicate that the resin composition according to the present invention, which contains a polyalkylene carbonate whose ends have been modified with an end-capping agent, has excellent compatibility with the graft copolymer (ABS), and is effective in providing excellent moldability, elongation, and surface properties.

Claims

1. a polyalkylene carbonate resin including an end-capping moiety; a graft copolymer, The end-capping moiety is a unit derived from any one or more selected from maleic anhydride, 4-t-octylphenol, 2-naphthol, 4-n-butoxyphenol, 4-phenylphenol, 4-(benzyloxy)phenol, and 4-t-butylphenol.

2. The resin composition of claim 1 , wherein the end-capping moieties are units derived from maleic anhydride.

3. The resin composition according to claim 1, wherein the polyalkylene carbonate resin contains 0.5% to 2.0% by weight of an end-capping moiety.

4. The resin composition according to claim 1, wherein the polyalkylene carbonate resin and the graft copolymer have a weight ratio of 1:0.5 to 1:

9.

5. 2. The resin composition according to claim 1, wherein the graft copolymer comprises a conjugated diene rubber core and a shell containing units derived from an aromatic vinyl monomer and units derived from a vinyl cyanide monomer.

6. The graft copolymer comprises 30% by weight to 70% by weight of a conjugated diene rubber core; and 30% to 70% by weight of a shell containing units derived from an aromatic vinyl monomer and units derived from a vinyl cyanide monomer, The resin composition according to claim 5, wherein the shell contains 55% by weight to 85% by weight of units derived from an aromatic vinyl monomer and 15% by weight to 45% by weight of units derived from a vinyl cyanide monomer.

7. The resin composition according to claim 1 , wherein the polyalkylene carbonate resin further contains units derived from an antioxidant.

8. The polyalkylene carbonate resin has a heat resistance temperature of 230 ° C to 300 ° C and a melt viscosity measured at 190 ° C under a load of 2.16 kg of 1 g / 10 min to 25 g / 10 min. The resin composition according to claim 1.

9. The resin composition according to claim 1 , further comprising a compatibilizer.

10. A molded article comprising the resin composition according to claim 1.

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