Super-Tough Polylactide with Low Molecular Weight Poly(ε-caprolactone) by In Situ Reactive Compatibilization

被引：0
|
作者：
Luo T. [1 ,2 ]
Gu L. [2 ]
Su S. [1 ]
Yu H. [2 ]
机构：
[1] College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha
[2] Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo
来源：
Gaofenzi Cailiao Kexue Yu Gongcheng/Polymeric Materials Science and Engineering | 2018年 / 34卷 / 03期
关键词：
4; 4'-diphenylmethane diisocyanate; Poly(ε-caprolactone); Polylactide; Toughening;
D O I：
10.16865/j.cnki.1000-7555.2018.03.021
中图分类号：
学科分类号：
摘要：
Low molecular weight poly(ε-caprolactone) diols (PCL-OH500) was used to toughen polylactide (PLA) with 4, 4'-diphenylmethanediisocyanate (MDI) by reactive blend. In the PLA/PCL-OH500/MDI blend, polyurethane derived from reaction of PCL-OH500 and MDI was dispersed phase and PLA was continuous phase, which was observed in the SEM images. DSC and TGA were employed to study the thermal properties of the blend. The thermal stability of the blend is slightly reduced compared to pure PLA. The resulting PLA/PCL-OH500/MDI(80/20/0.5) blend shows super toughness, and the elongation at break is improved by 10 times to 48.51%, compared to 5.33% of pure PLA, while the corresponding yielding strength and elastic modulus display slightly decrease. The toughening mechanism of PLA/PCL-OH500/MDI blend is plastic deformation of the matrix caused by cavitation, arising from dispersed phase particles debonding from the matrix. © 2018, Editorial Board of Polymer Materials Science & Engineering. All right reserved.
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页码：122 / 126
页数：4
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