材料科学与工程学报2017，Vol.35Issue(4)：587-591,569,6.DOI:10.14136/j.cnki.issn 1673-2812.2017.04.014
扩链剂对聚乳酸/改性淀粉共混物性能的影响
Effect of Chain Extender on Properties of Poly(Lactic Acid) /Modified Starch Blends
张臣 1陆冲 1程树军1
作者信息
- 1. 华东理工大学材料科学与工程学院,上海200237
- 折叠
摘要
Abstract
Maleated thermoplastic starch(MTPS) was prepared via melt processing,and the structure of MTPS was characterized.With epoxy chain extender (REC) as a compatibilizer,blends of Poly(lactic acid) (PLA)/MTPS/REC were prepared by melt blending.The effect of the chain extender on the properties of the blends were investigated.The results showed that the epoxy groups in REC could react with the carboxyl groups or hydroxyl groups in PLA and MTPS,and the reaction improved the compatibility of starch phase and PLA phase,promoted the dispersion of starch granules in PLA matrix and decreased the particle size of starch granules to 0.5μm or less.Meanwhile,REC had a chain extension effect on PLA,and the mechanical properties of the blends improved significantly,especially with the elongation at break reaching 280％.In addition,the crystallization ability of PLA decreased and the medium resistance of PLA improved.关键词
聚乳酸/淀粉/环氧扩链剂/相容性/扩链Key words
PLA/starch/epoxy chain extender/compatibility/chain extension分类
化学化工引用本文复制引用
张臣,陆冲,程树军..扩链剂对聚乳酸/改性淀粉共混物性能的影响[J].材料科学与工程学报,2017,35(4):587-591,569,6.
