Crystallization Behavior of Asymmetric PLLA/PDLA Blends

doi:10.1021/jp111894m

CORC > 化学研究所 > 中国科学院化学研究所

	Crystallization Behavior of Asymmetric PLLA/PDLA Blends
	Sun, Jingru 1; Yu, Haiyang 1; Zhuang, Xiuli 1; Chen, Xuesi 1; Jing, Xiabin 2
刊名	JOURNAL OF PHYSICAL CHEMISTRY B
	2011-03-31
卷号	115 期号:12 页码:2864-2869
ISSN号	1520-6106
DOI	10.1021/jp111894m
英文摘要	The effects of the addition of poly(D-lactide) (PDLA) on the crystallization behavior of poly(L-lactide) (PLLA) were investigated by means of differential scanning calorimetry (DSC) and temperature-dependent X-ray diffraction(XRD). When the blends were cooled from different temperatures (250, 240, and 190 degrees C) at the rate of cooling of 5 degrees C/min, stereocomplex (sc) crystallites could stay at diverse states. Accordingly, the stereocomplexes acted as a nucleation agent exerting distinct effects on PLLA crystallization. The speculated mechanisms of the stereocomplex formation and the effectiveness as a nucleating agent are schematically described. Moreover, temperature-dependent XRD was carried out to further :investigate the melt-crystallization behavior of PLLA/PDLA blends in real time. Temperature-dependent XRD results indicated that even at 240 degrees C the stereocomplex crystallites in all blend samples. existed clearly, which could not be detected by DSC. These XRD results further suggest that the onset T(c) values for the PLLA alpha-form crystals formation were 160, 120, 140, and 160 degrees C, respectively, for neat PLLA, PLLA/PDLA 95/5, 90/10, and 80/20 as well as 70/30 samples.
语种	英语
出版者	AMER CHEMICAL SOC
WOS记录号	WOS:000288644700022
内容类型	期刊论文
源URL	[http://ir.iccas.ac.cn/handle/121111/71411]
专题	中国科学院化学研究所
通讯作者	Chen, Xuesi
作者单位	1.Chinese Acad Sci, Changchun Inst Appl Chem, Key Lab Polymer Ecomat, Changchun 130022, Peoples R China 2.Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Polymer Phys & Chem, Changchun 130022, Peoples R China
推荐引用方式 GB/T 7714	Sun, Jingru,Yu, Haiyang,Zhuang, Xiuli,et al. Crystallization Behavior of Asymmetric PLLA/PDLA Blends[J]. JOURNAL OF PHYSICAL CHEMISTRY B,2011,115(12):2864-2869.
APA	Sun, Jingru,Yu, Haiyang,Zhuang, Xiuli,Chen, Xuesi,&Jing, Xiabin.(2011).Crystallization Behavior of Asymmetric PLLA/PDLA Blends.JOURNAL OF PHYSICAL CHEMISTRY B,115(12),2864-2869.
MLA	Sun, Jingru,et al."Crystallization Behavior of Asymmetric PLLA/PDLA Blends".JOURNAL OF PHYSICAL CHEMISTRY B 115.12(2011):2864-2869.