Toughening Behavior of Poly(L-Lactic Acid)/Poly(D-Lactic Acid) Asymmetric Blends

被引：5
|
作者：
Guo, Yanmei [1 ]
Wang, Liying [1 ]
Cheng, Dehao [1 ]
Shao, Jun [1 ]
Hou, Haoqing [1 ]
机构：
[1] JiangXi Normal Univ, Coll Chem & Chem Engn, 99 Ziyang Rd, Nanchang 330022, Jiangxi, Peoples R China
来源：
POLYMER-PLASTICS TECHNOLOGY AND ENGINEERING | 2018年 / 57卷 / 12期
基金：
中国国家自然科学基金;
关键词：
Crystallinity; mechanical property; poly(D-lactide); poly(L-lactide); poly(lactide) stereocomplex; toughening; DIFFERENT OPTICAL PURITIES; STEREOCOMPLEX FORMATION; CRYSTALLIZATION BEHAVIOR; MECHANICAL-PROPERTIES; POLY(LACTIC ACID); THERMOMECHANICAL PROPERTIES; POLY(D-LACTIC ACID); HOMOGENEOUS NUCLEATION; MOLECULAR-WEIGHTS; PLLA/PDLA BLENDS;
D O I：
10.1080/03602559.2017.1373405
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
The L-configured poly(lactic acid) has exhibited vast appeal in the past decades. However, most previous researches reveal that L-configured poly(lactic acid) exhibits fragile behavior, which limits its applications. Present work clarified that the toughness of poly(lactic acid) depended on the content of crystallites and rigid component incorporated into the specimens. The elongation at break was remarkably high in the L-configured poly(lactic acid)/D-configured poly(lactic acid) with a small amount of D-configured poly(lactic acid) (15%). The stretching led to orientation of crystals and amorphous molecular chains and segments. The crystals did not vary, while the amorphous molecular chains transited to mesophase during stretching, and this mesophase formed homocrystallites during heating. [GRAPHICS] .
引用
收藏
页码：1225 / 1235
页数：11
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