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Thermal, mechanical and rheological properties of polylactide toughened by expoxidized natural rubber

文献类型： 外文期刊

作者： Zhang, Chunmei 1 ; Wang, Weiwei 1 ; Huang, Yun 1 ; Pan, Yonghao 1 ; Jiang, Long 1 ; Dan, Yi 1 ; Luo, Yongyue 2 ; Peng, Zh 1 ;

作者机构： 1.Sichuan Univ, Polymer Res Inst, State Key Lab Polymer Mat Engn China, Chengdu 610065, Sichuan, Peoples R China

2.Chinese Acad Trop Agr Sci, Agr Prod Proc Res Inst, Chinese Agr Minist Key Lab Trop Crop Prod Proc, Zhanjiang 524001, Peoples R China

关键词： Polylactide;Crystallization;Interfacial adhesion;Epoxidized natural rubber;Rheological properties

期刊名称：MATERIALS & DESIGN （ 影响因子：7.991； 五年影响因子：7.097 ）

ISSN： 0261-3069

年卷期： 2013 年 45 卷

页码：

收录情况： SCI

摘要： This paper concerns on the use of epoxidized natural rubber (ENR) as toughening agent for polylactide (PLA). ENR with epoxidation content of 20 mol% (ENR20) and 50 mol% (ENR50) were separately melt blended with PLA using an internal mixer. DSC results suggested that PLA/ENR blends were amorphous after melt blending while they were crystalline and revealed two melting peaks in the thermograms after being annealed at 100 degrees C. Mechanical tests showed that the introduction of ENR reduced the tensile modulus and strength but enhanced the elongation and the impact strength of PLA. The impact strength of the 20 wt% ENR20/PLA and ENR50/PLA blends increased to 6-fold and 3-fold, respectively, compared to that of pure PLA. This enhancement was due to a good interfacial adhesion between ENR and PLA. Both ENR20/PLA and ENR50/PLA blends performed very strong shear thinning behavior, and the complex viscosity, storage and loss modulus of the blends also increased after blending with ENR. (C) 2012 Elsevier Ltd. All rights reserved.

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