Gao Lijun, Chen Xianggen, Liang Xiangjun, Guo Xiuzhi, Huang Xianling, Chen Caifen, Wan Xiaodan, Deng Ruyu, Wu Qifeng, Wang Lingyun, Feng Jiuying
School of Chemistry and Chemical Engineering, Key Laboratory of Clean Energy Materials Chemistry of Guangdong Higher Education Institutes, Resource and Chemical Engineering Technology Research Center of Western Guangdong Province, Lingnan Normal University, Zhanjiang 524048, China.
Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510641, China.
Polymers (Basel). 2019 May 14;11(5):881. doi: 10.3390/polym11050881.
The thermoplastic poly(propylene carbonate) (PPC) containing cross-linked networks was one-pot synthesized by copolymerization of carbon dioxide, propylene oxide (PO), maleic anhydride (MA), and furfuryl glycidyl ether (FGE). The copolymers were characterized by Fourier transform infrared spectroscopy (FT-IR), gel permeation chromatography (GPC), differential scanning calorimetry (DSC), and thermogravimetric analysis (TGA) measurements. The thermal and dimensional stability of the copolymers were improved. When the MA and FGE load increased from 1 mol% to 4 mol% of PO, the copolymers contained the gel contents of 11.0%-26.1% and their yields were about double that of the PPC. The 5% weight-loss degradation temperatures () and the maximum weight-loss degradation temperatures () increased from 149.7-271.3 °C and from 282.6-288.6 °C, respectively, corresponding to 217.1 °C and 239.0 °C of PPC. Additionally, the hot-set elongation tests showed that the copolymers exhibited elasticity and dimensional stability with the minimum permanent deformation of 6.5% which was far less than that of PPC of 157.2%, while the tensile strengths were a little lower than that of PPC because of the following two conflicting factors, cross-links and flexibility of the units formed by the introduced third monomers, MA and FGE. In brief, we provide a novel method of one-pot synthesis of PPC containing cross-linked networks. According to this idea, the properties would be more extensively regulated by changing the cross-linkable monomers.
通过二氧化碳、环氧丙烷（PO）、马来酸酐（MA）和糠基缩水甘油醚（FGE）的共聚反应，一步合成了含交联网络的热塑性聚碳酸亚丙酯（PPC）。通过傅里叶变换红外光谱（FT-IR）、凝胶渗透色谱（GPC）、差示扫描量热法（DSC）和热重分析（TGA）测量对共聚物进行了表征。共聚物的热稳定性和尺寸稳定性得到了提高。当MA和FGE的负载量从PO的1 mol%增加到4 mol%时，共聚物的凝胶含量为11.0%-26.1%，产率约为PPC的两倍。5%失重降解温度（）和最大失重降解温度（）分别从149.7-271.3℃和282.6-288.6℃升高，对应于PPC的217.1℃和239.0℃。此外，热定形伸长试验表明，共聚物表现出弹性和尺寸稳定性，最小永久变形为6.5%，远低于PPC的157.2%，而拉伸强度略低于PPC，这是由于以下两个相互矛盾的因素，即交联以及由引入的第三单体MA和FGE形成的单元的柔韧性。简而言之，我们提供了一种一步合成含交联网络的PPC的新方法。根据这一思路，通过改变可交联单体可以更广泛地调节材料性能。
