摘要
采用熔融法制备聚乳酸接枝马来酸酐(PLA-g-MAH)用于增容改性聚乳酸/聚对苯二甲酸乙二醇酯-1,4-环己烷二甲醇酯(PLA/PETG)共混物,通过傅里叶转换红外光谱(FT-IR)、扫描电子显微镜(SEM)和力学性能测试,考察了共混物的结构和力学性能。SEM结果显示,加入增容剂PLA-g-MAH后,PLA/PETG共混物两相间的界面明显变得模糊,说明PLA-g-MAH对共混物具有一定的增容作用;增容剂的引入,使共混物的拉伸强度和弯曲模量略有下降,但冲击强度略有提高,断裂伸长率显著提高(PLA的为6.9%,而加入3%增容剂共混物的为21.9%,提高到纯样的3倍左右),表现出良好的性能。
Poly （lactic acid）-graft-maleic anhydride （PLA-g-MAH） prepared by melt the,lding was used of compatiblize poly （ lactic acid）/poly （ ethylene glycol-co-cyclohexane- 1, 4-dimethanol terephathatate） （ Tend. The structure and properties of PLA/PETG blends were investigated by Fourier transform infrare：d spectroscopy （FT-IR）, scanning electron microscope （SEM） and mechanical property testing. SEM resuhs show that the phase interface between PLA and PETG in PLA/PETG blends with compatibilizer PI.A-g-MAH becomtes blurred, indicating the compatibilization effect of PLA-g-MAH for PI.A/PETG blend. The introduction of PLA-g MAH results in slight decrease of tensile strength and flexural modulus, but improvement of impacl slre!ngtb and elongation at break which is 6.9 % for pure PLA, and 21.9 % for.blend with 3 % content of PI.A-g-MAHI.
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
2013年第3期107-110,共4页
Polymer Materials Science & Engineering
基金
国家自然科学基金资助项目(50973074
51073110)
