CRYSTALLIZATION OF SYNDIOTACTIC POLYSTYRENE IN ATACTIC POLYSTYRENE NETWORKS
The crystallization mechanism of polymer within the limited space, including nano-spheres, nanorods and surface area is received a lot of interests recently.1-6 The smaller but homogeneous size of the crystallites may give the unusual characteristics in the resultant crystalline structures, which can not be observed for usual bulk crystals. Some other works focused on the crystallization behaviors within the polymer networks, in which the restricted chain diffusion by the cross-links is a key to emphasize the nucleation effect on polymer crystallization.7-10 The crystallization of the free linear poly(ethylene oxide) (PEO) chains in poly(trimethopropane trimethacrylate) (PTMPTMA) networks has been reported, which shows the different crystallization behaviors to the bulk state.10 However, PEO and PTMPTMA network are not miscible and the crystallization of PEO in the system is somewhat similar to those block copolymer systems.11-13 On grounds of the published results, there is no clear argument on crystallization behaviors of the linear polymer chains within the miscible networks. The investigations of the crystallization behaviors of linear polymers within their compatible networks might be helpful in this respect. In this work, sPS δ form crystals within aPS and aPS network (aPSNW) were prepared. The polymorphism behaviors of sPS within aPS and aPSNW were investigated by in-situ wide angle X-ray diffraction (WAXD) and differential scanning calorimetry (DSC). Due to that aPS is miscible with the amorphous state of sPS,14 this work is helpful for us to understand the influences of the constraining amorphous phase on the crystallization behaviors of linear polymer.
Xia Gao Ruigang Liu Yong Huang Wilhelm Oppermann
Beijing Centre of Physical and Chemical Analysis,Beijing Academy of Sciences and Technology,Beijing State Key Laboratory of Polymer Physics and Chemistry,Joint Laboratory of Polymer Science and Materi Institute of Physical Chemistry,Technical University of Clausthal,Arnold-Sommerfeld Strasse 4,38678
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
101-102
2008-06-08（万方平台首次上网日期，不代表论文的发表时间）