MICROPHASE SEPARATION AFFECTS ON CRYSTALLIZATION OF POLY(ETHYLENE OXIDE-LACTIDE) DIBLOCK COPOLYMER
Poly(L-Iactic acid) (PLLA) (-CH(CH3)COOn-) is a biodegradable and biocompatible crystalline polymer that can be produced from renewable sources, such as corns.1-4 Its crystallization behavior, crystal structure and crystalline morphology have been extendedly studied, and recently the investigation of its block copolymer has drawn much attention. When one or more block copolymer components can crystallize, a competition between phase separation and crystallization will lead to major changes in microstructure. Depending on segregation strength and the relative location of the order-disorder transition temperature Todt. the glass transition temperature Tg and the crystallization temperature Tc, different morphologies can be generated. Either crystallization can drive structure formation for weekly segregated melt (overwriting any previous micro-domain structure) or crystallization can be confined within the copolymer micro-domain structure for strongly segregated systems or homogenous systems.5-9
Shaoyong Huang Shichun Jiang Lijia An
State Key Laboratory of Polymer Physics and Chemistry,Changchun Institute of Applied Chemistry,Chinese Academy of Sciences,Changchun 130022,P.R.China
国际会议
International Symposium on Polymer Physics(2008年国际高分子物理学术会议PP2008)
厦门
英文
274-275
2008-06-08（万方平台首次上网日期，不代表论文的发表时间）