Role of PEG Segment in Stereocomplex Crystallization for PLLA/PDLA-b-PEG-b-PDLA Blends

	Role of PEG Segment in Stereocomplex Crystallization for PLLA/PDLA-b-PEG-b-PDLA Blends
	Song, Yan 1,3; Wang, Dujin 1; Jiang, Ni 1; Gan, Zhihua 2
刊名	ACS SUSTAINABLE CHEMISTRY & ENGINEERING
	2015-07-01
卷号	3 期号:7 页码:1492-1500
关键词	Poly(L-lactic acid) PDLA-b-PEG-b-PDLA Blend Stereocomplex crystallization Morphology
英文摘要	The isothermal crystallization behavior and morphology of neat poly(L-lactic acid) (PLLA) and its blends with poly(D-lactic acid) (PDLA) and PDLA-b-poly(ethylene glycol) (PEG)-b-PDLA have been investigated. The glass transition temperature of the PLLA/PDLA blend, and especially the PLLA/PDLA-b-PEG-b-PDLA blend, is much lower than that of neat PLLA, indicating the plasticization effect of both low molecular weight PDLA and flexible PEG block. Both the PLLA/PDLA and PLLA/PDLA-b-PEG-b-PDLA blends can form stereocomplex (SC) crystals. However, the PDLA in the PLLA/PDLA blend postponed the crystallization rate of the blend, whereas the PEG chains in PLLA/PDLA-b-PEG-b-PDLA not only promoted the formation of SC crystals but also facilitated the crystallization of the PLLA matrix. The evolution of the crystal structure and morphologies of PLLA and its blends during the isothermal crystallization process have revealed the significant role of flexible PEG chains in the stereocomplex crystallization.
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/121111/27843]
专题	化学研究所_工程塑料实验室
作者单位	1.Chinese Acad Sci, Inst Chem, Key Lab Engn Plast, Beijing 100190, Peoples R China 2.Beijing Univ Chem Technol, Coll Life Sci & Technol, Beijing Lab Biomed Mat, State Key Lab Organ Inorgan Composites, Beijing 100029, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Song, Yan,Wang, Dujin,Jiang, Ni,et al. Role of PEG Segment in Stereocomplex Crystallization for PLLA/PDLA-b-PEG-b-PDLA Blends[J]. ACS SUSTAINABLE CHEMISTRY & ENGINEERING,2015,3(7):1492-1500.
APA	Song, Yan,Wang, Dujin,Jiang, Ni,&Gan, Zhihua.(2015).Role of PEG Segment in Stereocomplex Crystallization for PLLA/PDLA-b-PEG-b-PDLA Blends.ACS SUSTAINABLE CHEMISTRY & ENGINEERING,3(7),1492-1500.
MLA	Song, Yan,et al."Role of PEG Segment in Stereocomplex Crystallization for PLLA/PDLA-b-PEG-b-PDLA Blends".ACS SUSTAINABLE CHEMISTRY & ENGINEERING 3.7(2015):1492-1500.