CONFINED LAMELLA FORMATION IN CRYSTALLINE-CRYSTALLINE POLY(ETHYLENE OXIDE)-b-POLY(ε-CAPROLACTONE) DIBLOCK COPOLYMERS  

作　　者：Fei-fei Xue Xue-si Chen Li-jia An Sergio S. Funari Shi-chun Jiang 

机构地区：[1]School of Materials Science and Engineering, Tianjin University [2]State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences [3]HASYLAB at DESY

出　　处：《Chinese Journal of Polymer Science》2013年第9期1260-1270,共11页高分子科学（英文版）

基　　金：supported by the National Natural Science Foundation of China (Nos. 20974077, 51173130);Synchrotron experiments at Beam line A2 were supported by HASYLAB project (I-20110306, II20090111)

摘　　要：The real time and in situ investigation of the crystallization process and structure transitions of asymmetric crystalline-crystalline diblock copolymers from the melt was performed with synchrotron simultaneous SAXS/WAXS. The asymmetric poly（ethylene oxide）-b-poly（ε-caprolactone） diblock copolymers were chosen for the present study. It was shown that the short blocks crystallized later than the long blocks and final lamellar structure was formed in all of the asymmetric diblock copolymers. The final lamellar structure was confirmed by AFM observation. The SAXS data were analyzed with different methods for the early stage of the crystallization. The Guinier plots indicated that there were no isolated domains formed before the formation of lamellae in the asymmetric diblock copolymers during the crystallization process. Debye- Bueche plots implied the formation of correlated domains during crystallization.The real time and in situ investigation of the crystallization process and structure transitions of asymmetric crystalline-crystalline diblock copolymers from the melt was performed with synchrotron simultaneous SAXS/WAXS. The asymmetric poly（ethylene oxide）-b-poly（ε-caprolactone） diblock copolymers were chosen for the present study. It was shown that the short blocks crystallized later than the long blocks and final lamellar structure was formed in all of the asymmetric diblock copolymers. The final lamellar structure was confirmed by AFM observation. The SAXS data were analyzed with different methods for the early stage of the crystallization. The Guinier plots indicated that there were no isolated domains formed before the formation of lamellae in the asymmetric diblock copolymers during the crystallization process. Debye- Bueche plots implied the formation of correlated domains during crystallization.

关 键 词：PEO-b-PCL diblock copolymers Synchrotron simultaneous SAXS/WAXS Polymer crystallization Confinedlamella formation. 

分 类 号：O631.3[理学—高分子化学]