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由二氧化碳和环氧丙烷成功合成了高分子量、规则分子链结构的聚碳酸亚丙酯(PPC)。~(13)NMR谱证明所得PPC共聚物具有交替结构。PPC的降解行为通过土壤埋藏法和溶液沉浸法来研究。结果表明在6个月后土壤埋藏的PPC膜比沉浸在缓冲溶液中的膜质量损失增加得更慢。而在缓冲溶液中沉浸的膜在最初的两个月中质量损失增加的很快,达到4.59％。吸水实验也同样显示在缓冲溶液中的PPC膜比土壤埋藏测试中吸水性更强。PPC膜的降解机理和样品的形态、红外光谱以及~1H NMR谱相一致。扫描电镜形态和质量损失以及吸水测量的结果一致。
Polycarbonate (PPC) with high molecular weight and regular molecular chain structure has been successfully synthesized from carbon dioxide and propylene oxide. ~ (13) NMR spectroscopy proves that the resulting PPC copolymer has an alternating structure. Degradation behavior of PPC was studied by soil burial and solution immersion. The results showed that the soil-buried PPC membrane increased more slowly after 6 months than the membrane mass loss immersed in the buffer solution. The mass loss of immersed membranes in buffer solution increased rapidly in the first two months, reaching 4.59%. Water absorption experiments also show that PPC membranes in buffer solution are more hygroscopic than soil burial tests. The degradation mechanism of PPC membrane is consistent with that of the sample, its IR spectrum and ~ 1H NMR spectrum. Scanning electron microscopy morphological and mass loss and water absorption measurement results.