Super-Tough and Highly-Ductile Poly(l-lactic acid)/Thermoplastic Polyurethane/Epoxide-Containing Ethylene Copolymer Blends Prepared by Reactive Blending

被引：22
|
作者：
Lin, Wangyang [1 ]
He, Yue [1 ]
Qu, Jin-Ping [1 ]
机构：
[1] South China Univ Technol, Guangdong Prov Key Lab Tech & Equipment Macromol, Natl Engn Res Ctr Novel Equipment Polymer Proc,Mi, Key Lab Polymer Proc Engn,Sch Mech & Automot Engn, Guangzhou 510640, Guangdong, Peoples R China
来源：
MACROMOLECULAR MATERIALS AND ENGINEERING | 2019年 / 304卷 / 06期
基金：
中国国家自然科学基金;
关键词：
co-continuous-like structures; poly(l-lactic acid); reactions; thermoplastic polyurethane; toughness; PHASE MORPHOLOGY; POLY(LACTIC ACID); TERNARY BLENDS; POLYLACTIDE; COMPOSITES;
D O I：
10.1002/mame.201900020
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Ethylene-methyl acrylate-glycidyl methacrylate copolymer (E-MA-GMA) is employed to improve the impact toughness of poly(l-lactic acid) (PLLA)/thermoplastic polyurethane (TPU) blends by reactive melt-blending. The reaction and miscibility between the components are confirmed by Fourier transform infrared spectroscopy, dynamic mechanical analysis, and differential scanning calorimetry. A super-tough PLLA/TPU/E-MA-GMA multiphase blend (75/10/15) exhibits a significantly improved impact strength of 77.77 kJ m(-2), which is more than 17 times higher than that of PLLA/TPU (90/10) blend. A co-continuous-like TPU phase structure involving E-MA-GMA phase at the etched cryo-fractured surface and the high-orientated matrix deformation at the impact-fractured surface are observed by scanning electron microscopy. The high-orientated matrix deformation induced by the co-continuous TPU phase structure is responsible for the super toughness of PLLA/TPU/E-MA-GMA blends.
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页数：6
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