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首页> 外文期刊>Polymer international >Synthesis and characteristics of a novel aliphatic polycarbonate, poly[(propylene oxide)-co-(carbon dioxide)-co-(gamma-butyrolactone)]
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Synthesis and characteristics of a novel aliphatic polycarbonate, poly[(propylene oxide)-co-(carbon dioxide)-co-(gamma-butyrolactone)]

机译：新型脂肪族聚碳酸酯聚[（环氧丙烷）-共-（二氧化碳）-共-（γ-丁内酯）]的合成及特征

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摘要

A novel aliphatic polycarbonate, poly[(propylene oxide)-co-(carbon dioxide)-co-(gamma-butyrolactone)] [P(PO-CO2-GBL)], was synthesized by the copolymerization of carbon dioxide, propylene oxide (PO) and gamma-butyrolactone (GBL). The resulting copolymers were determined by FTIR and NMR spectral analysis with viscosity-average molecular weights (M-v) from 50000 to 120000 g mol(-1). According to elemental analysis, the calculated data of elemental contents in P(PO-CO2-GBL)44 were close to the found data. The result showed that GBL was inserted into the backbone of poly[(propylene oxide)-co-(carbon dioxide)] successfully. GBL offered an ester structural unit that gave the copolymer better degradability. The correlations between reaction conditions and properties were studied. When GBL content increased, the M-v and the glass transition temperature (T-g) of the copolymers improved relative to an identical copolymer without GBL. Prolonging the reaction time of the copolymerization resulted in increases in M-v and T-g. P(PO-CO2-GBL) exhibited a high T-g above 40 degrees C. The rate of backbone degradation increased with increasing GBL content. (c) 2005 Society of Chemical Industry.
机译：通过将二氧化碳与环氧丙烷进行共聚，合成了一种新型的脂肪族聚碳酸酯，聚[（环氧丙烷）-共-（二氧化碳）-共-（γ-丁内酯）] [P（PO-CO2-GBL）] PO）和γ-丁内酯（GBL）。所得共聚物通过FTIR和NMR光谱分析确定，其粘均分子量（M-v）为50000至120000 g mol（-1）。根据元素分析，P（PO-CO2-GBL）44中元素含量的计算数据与找到的数据接近。结果表明GBL成功插入了聚[（环氧丙烷）-co-（二氧化碳）]的骨架中。 GBL提供了一种酯结构单元，使共聚物具有更好的降解性。研究了反应条件与性质之间的相关性。当GBL含量增加时，相对于没有GBL的相同共聚物，共聚物的M-v和玻璃化转变温度（T-g）提高。延长共聚反应时间会导致M-v和T-g的增加。 P（PO-CO2-GBL）在40摄氏度以上显示高T-g。主链降解速率随GBL含量的增加而增加。 （c）2005年化学工业协会。

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