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通过聚碳酸亚丙酯(PPC)与聚乙二醇(PEG)的共混,提高PPC的热性能、亲水性和降解性能。通过1HNMR、FT-IR、XRD研究了共混物的相容性,表明聚合物之间没有发生化学反应,两者之间为简单的物理共混,相容性较好。共混物热性能的测试结果表明,共混物的玻璃化转变温度最高为61℃,比PPC提高了39℃,Td50%和最高分解速率时的温度都在242～262℃范围内,高于PPC的Td50%(235℃)和Tmax(238℃);共混物亲水性是PPC的12～33倍,其溶液降解性最多比PPC提高16倍,而生物降解性能至少比PPC提高4～6倍。
Through the blending of polypropylene carbonate (PPC) and polyethylene glycol (PEG), the thermal, hydrophilic and degradative properties of PPC are improved. The compatibility of the blends was studied by 1HNMR, FT-IR and XRD. The results showed that there was no chemical reaction between the two polymers, and the two were simple physical blends with good compatibility. The results of the thermal properties of the blends show that the highest glass transition temperature of the blends is 61 ℃, 39 ℃ higher than that of PPC, and the temperature of Td50% and the highest decomposition rate are in the range of 242 ~ 262 ℃ PTP Td50% (235 ℃) and Tmax (238 ℃). The hydrophilicity of the blends is 12-33 times that of PPC, the degradation of the solution is up to 16 times higher than that of PPC and the biodegradability is at least 4 ~ 6 times.