Crystallization Behavior of Asymmetric PLLA/PDLA Blends | |
Sun, Jingru1; Yu, Haiyang1; Zhuang, Xiuli1; Chen, Xuesi1; Jing, Xiabin2 | |
刊名 | JOURNAL OF PHYSICAL CHEMISTRY B
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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. |
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