马来酸酐
增容
热塑性塑料
材料科学
傅里叶变换红外光谱
动态力学分析
淀粉
生物降解
乳酸
化学工程
高分子化学
复合材料
聚合物混合物
聚合物
有机化学
共聚物
化学
细菌
工程类
生物
遗传学
作者
Marzieh Akrami,Ismaeil Ghasemi,Hamed Azizi,Mohammad Karrabi,Mohammad Seyedabadi
标识
DOI:10.1016/j.carbpol.2016.02.035
摘要
In this study, a new compatibilizer was synthesized to improve the compatibility of the poly(lactic acid)/thermoplastic starch blends. The compatibilizer was based on maleic anhydride grafted polyethylene glycol grafted starch (mPEG-g-St), and was characterized using Fourier transform infrared spectroscopy (FTIR), dynamic mechanical thermal analysis (DMTA) and back titration techniques. The results indicated successful accomplishment of the designed reactions and formation of a starch cored structure with many connections to m-PEG chains. To assess the performance of synthesized compatibilizer, several PLA/TPS blends were prepared using an internal mixer. Consequently, their morphology, dynamic-mechanical behavior, crystallization and mechanical properties were studied. The compatibilizer enhanced interfacial adhesion, possibly due to interaction between free end carboxylic acid groups of compatibilizer and active groups of TPS and PLA phases. In addition, biodegradability of the samples was evaluated by various methods consisting of weight loss, FTIR-ATR analysis and morphology. The results revealed no considerable effect of compatibilizer on biodegradability of samples.
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