Phase morphology, crystallization behavior and mechanical properties of poly(L-lactide) toughened with biodegradable polyurethane: Effect of composition and hard segment ratio

	Phase morphology, crystallization behavior and mechanical properties of poly(L-lactide) toughened with biodegradable polyurethane: Effect of composition and hard segment ratio
	Xing, Qian 1,2; Li, Rong-bo 3; Dong, Xia 2; Zhang, Xiu-qin 2; Zhang, Liao-yun 1; Wang, Du-jin 2
刊名	CHINESE JOURNAL OF POLYMER SCIENCE
	2015-09-01
卷号	33 期号:9 页码:1294-1304
关键词	Poly(L-lactide) Polyurethane Phase morphology Impact modification Hard segment ratio
英文摘要	Polyester-based biodegradable polyurethane (PU) with different hard segment ratios was selected to modify the impact toughness of poly(L-lactide) (PLLA). The influence of blending composition and hard segment ratio of PU on the phase morphology, crystallization behavior and mechanical properties of PLLA/PU blends has been investigated systematically. The results showed that the PU particles were uniformly dispersed in PLLA matrix at a scale from submicrons to several microns. The glass transition temperature of PU within these blends decreased compared to that of neat PU, but rose slightly with its content and hard segment ratio. The presence of PU retarded the crystallization ability of PLLA, whereas enhanced its elongation at break and impact resistance effectively. As the PU content reaches up to 30 wt%, the phenomenon of brittle-ductile transition occurred, resulting in a rougher fracture surface with the formation of fibril-like structure. Moreover, under the same concentrations, the elongation at break and impact strength of PLLA blends decreased slightly with the increase of hard segment ratio of PU.
收录类别	SCI
语种	英语
公开日期	2015-10-27
内容类型	期刊论文
源URL	[http://ir.iccas.ac.cn/handle/121111/27876]
专题	化学研究所_工程塑料实验室
作者单位	1.Univ Chinese Acad & Sci, Sch Chem & Chem Engn, Beijing 100049, Peoples R China 2.Chinese Acad Sci, CAS Key Lab Engn Plast, Inst Chem, Beijing Natl Lab Mol Sci, Beijing 100190, Peoples R China 3.Petrochina Petrochem Res Inst, Beijing 100195, Peoples R China
推荐引用方式 GB/T 7714	Xing, Qian,Li, Rong-bo,Dong, Xia,et al. Phase morphology, crystallization behavior and mechanical properties of poly(L-lactide) toughened with biodegradable polyurethane: Effect of composition and hard segment ratio[J]. CHINESE JOURNAL OF POLYMER SCIENCE,2015,33(9):1294-1304.
APA	Xing, Qian,Li, Rong-bo,Dong, Xia,Zhang, Xiu-qin,Zhang, Liao-yun,&Wang, Du-jin.(2015).Phase morphology, crystallization behavior and mechanical properties of poly(L-lactide) toughened with biodegradable polyurethane: Effect of composition and hard segment ratio.CHINESE JOURNAL OF POLYMER SCIENCE,33(9),1294-1304.
MLA	Xing, Qian,et al."Phase morphology, crystallization behavior and mechanical properties of poly(L-lactide) toughened with biodegradable polyurethane: Effect of composition and hard segment ratio".CHINESE JOURNAL OF POLYMER SCIENCE 33.9(2015):1294-1304.