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首页> 外文期刊>Journal of Applied Polymer Science >Use of modified poly(epsilon-caprolactone) in the compatibilization of poly(epsilon-caprolactone)/maize starch blends
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Use of modified poly(epsilon-caprolactone) in the compatibilization of poly(epsilon-caprolactone)/maize starch blends

机译：改性聚（ε-己内酯）在聚（ε-己内酯）/玉米淀粉共混物中的用途

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In this work, the compatibilization of a poly(epsilon-caprolactone) with a number-average molecular weight of 120,000 g/mol (PCL120) and maize starch was investigated by the addition of a chemically modified poly(epsilon-caprolactone). Two types of blends were prepared by melt extrusion. In type A blends, low-molecular-weight compatibilizers; were used: (1) a poly(epsilon-caprolactone) with a number-average molecular weight of 10,000 g/mol that was reacted with maleic anhydride to obtain chains terminating in carboxylic groups and (2) low-molecular-weight poly(epsilon-caprolactone)s (number-average molecular weights of 600 and 2000 g/mol) with one pendant carboxylic group within the chains. With these groups of blends, tensile testing and scanning electron microscopy demonstrated that the compatibilizers were generally effective in inducing a better dispersion for a 60/40 poly(epsilon-caprolactone)/maize starch blend with a compatibilizer, improving the mechanical properties in comparison with uncompatibilized blends. The blends with 30% starch were not improved by the addition of compatibilizer, and this may be related to the rheology of the blends during preparation. In type B blends, high-molecular-weight compatibilizers were prepared through the grafting of variable amounts of acrylic acid or maleic anhydride to PCL120 chains. The best compatibilizer action was obtained with 0.7 wt % maleic anhydride grafted to PCL120 because both the dispersion and mechanical properties were further improved in comparison with uncompatibilized blends and type A blends. (c) 2008 Wiley Periodicals, Inc.
机译：在这项工作中，通过添加化学改性的聚ε-己内酯，研究了数均分子量为120,000 g / mol的聚ε-己内酯（PCL120）与玉米淀粉的相容性。通过熔融挤出制备两种类型的共混物。在A型混合物中，低分子量增容剂;使用：（1）数均分子量为10,000 g / mol的聚（ε-己内酯）与马来酸酐反应，得到端基为羧基的链;（2）低分子量聚（ε） -己内酯）（数均分子量为600和2000 g / mol）在链内带有一个侧基羧基。通过这些组共混物，拉伸测试和扫描电子显微镜表明，相容剂通常可有效地诱导具有增容剂的60/40聚（ε-己内酯）/玉米淀粉共混物更好的分散性，与不相容的混合物。添加相容剂并不能改善淀粉含量为30％的混合物，这可能与混合物在制备过程中的流变性有关。在B型共混物中，通过将可变数量的丙烯酸或马来酸酐接枝到PCL120链上来制备高分子量增容剂。用0.7 wt％的马来酸酐接枝到PCL120可获得最佳的增容作用，因为与不相容的共混物和A型共混物相比，分散性和机械性能都得到了改善。 （c）2008 Wiley期刊公司

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