文献类型：期刊文献

英文题名：SPINODAL DECOMPOSITION IN A HYDROGEN-BONDED POLYMER BLEND

作者：HE, MJ; LIU, YM; YI, F; MING, J; HAN, CC

机构：[1]NIST,DIV POLYMERS,GAITHERSBURG,MD 20899;[2]E CHINA UNIV CHEM TECHNOL,DEPT POLYMER SCI & ENGN,SHANGHAI 200237,PEOPLES R CHINA;[3]FUDAN UNIV,INST MAT SCI,SHANGHAI 200433,PEOPLES R CHINA

年份：1991

卷号：24

期号：2

起止页码：464

外文期刊名：MACROMOLECULES

收录：;WOS:【SCI-EXPANDED(收录号:WOS:A1991EU81400020)】；

语种：英文

摘要：The spinodal decomposition of a hydrogen-bonded binary blend, which consists of a polystyrene with 1.5 mol % of p-(1,1,1,3,3,3-hexafluoro-2-hydroxyisopropyl)-a-methylstyrene comonomer and a poly(butyl methacrylate), has been studied. This system has a LCST with a very asymmetrical phase diagram. Also the critical point does not coincide with the temperature minimum of either the spinodal or the cloud-point curve. The kinetics follows the Cahn-Hilliard-Cook model for early spinodal decomposition and a self-similar mechanism for late-stage coarsening for most cases. For shallow quench cases and for close to glass transition temperature cases, double peaks have been observed during spinodal decomposition, which suggests that a second or an alternative relaxation mechanism may be dominating the coarsening process. A special procedure has been developed to measure the cloud point for this system, which should be applicable to any polymer blend system that has a cloud temperature close to the glass transition temperature.