Modification of polylactide upon physical properties by solution-cast blends from polylactide and polylactide-grafted dextran
Modification of polylactide upon physical properties by solution-cast blends from polylactide and polylactide-grafted dextran
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DOI：
10.1016/s0032-3861(03)00308-2
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发表时间：
2003-06
期刊：
影响因子：
4.6
通讯作者：
T. Ouchi;Tomohiro Kontani;Y. Ohya
中科院分区：
文献类型：
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作者：
T. Ouchi;Tomohiro Kontani;Y. Ohya
采用三甲基硅保护法合成了不同长度和数目的聚乳酸接枝多糖。通过热分析和动态力学分析研究了接枝共聚物制备的流延膜的性能。接枝共聚物膜表现出较低的玻璃化转变温度（Tg），熔融温度，和结晶度，和较高的粘度性能相比，PLA膜。此外，接枝共聚物作为增塑剂的有用性进行了研究与1：4共混膜制备的接枝共聚物和PLA。共混物膜显示出较低的Tg和结晶度，和较高的粘度性能相比，PLA膜。
Polylactide (PLA)-grafted polysaccharides with various lengths and numbers of graft chains were synthesized using a trimethylsilyl protection method. The properties of the cast films prepared from graft-copolymers were investigated through thermal and dynamic mechanical analyses. The graft-copolymer films exhibited a lower glass transition temperature (Tg), melting temperature, and crystallinity, and higher viscosity properties compared to PLA films. Moreover, the usefulness of graft-copolymer as a plasticizer was investigated with 1:4 blend films prepared from the graft-copolymers and PLA. The blend films showed lower Tgand crystallinity, and higher viscosity properties compared to PLA films.