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学科主题: 高分子化学
题名: 聚苯乙烯-b-聚右旋乳酸二嵌段共聚物的热性能与结晶行为研究
其他题名: THERMAL PROPERTIES AND CRYSTALLIZATION BEHAVIOR OF PS-b-PDLA BLOCK COPOLYMERS
作者: 侯小东 ; 何勇 ; 贾林 ; 朱英丹 ; 盛瑞隆 ; 曹阿民
通讯作者: 曹阿民
刊名: 高分子学报
发表日期: 2010-01-01
期: 6, 页:739-746
收录类别: SCI
部门归属: 中国科学院上海有机化学研究所
英文摘要: A new series of diblock polystyrene-b-poly(D-lactide) (PS-b-PDLA) were successfully synthesized with narrow molecular weight distribution and a PDLA block weight fraction f(w), of 0 similar to 0.61. By means of temperature-modulated differential scanning calorimeter (TMDSC), DSC and polarized optical microscopy, thermal and crystallization kinetics of these diblock copolymers have been studied along with the semi-crystalline PDLA homopolymer. It was found that the increase in rigid amorphous polystyrene block led to remarked confinement effect on melting point, degree of crystallinity and crystallization kinetics for the semi-crystalline PDLA blocks. The cold crystallization temperature and crystal equilibrium melting temperature for the PDLA block chains were revealed to be 14 degrees C and 38 degrees C lower than those of PDLA homopolymers, respectively. It was also noted that the crystallization behavior and apparent crystal growth rate were observed to vary at a temperature near the glass transition temperature of PS block chains. In addition, POM results indicated the diblock PS-b-PDLA organized spherulites, and apparent crystal growth rates not only depended on isothermal crystallization temperature, but the PDLA blocks weight fraction. Taking the effect of crystallization of PDLA blocks into consideration, these evidences may be helpful for controlled fabrication of 3D mesoscopic structures by self-assembling diblock PS-b-PDLA.
语种: 中文
内容类型: 期刊论文
URI标识: http://ir.sioc.ac.cn/handle/331003/22952
Appears in Collections:高分子材料研究室_期刊论文

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Recommended Citation:
侯小东,何勇,贾林,等. 聚苯乙烯-b-聚右旋乳酸二嵌段共聚物的热性能与结晶行为研究[J]. 高分子学报,2010(6):739-746.
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