波谱学杂志2016，Vol.33Issue(2)：188-197,10.DOI:10.11938/cjmr20160202
PVPh/PEO共混物动力学演化过程的NMR研究
Dynamic Evolution in PVPh/PEO Blend Studied by Solid-State NMR
摘要
Abstract
The13C centerband-only-detection-of-exchange (CODEX) variable-temperature solid-state NMR (SSNMR) technique was used to investigate the evolution of segmental dynamics in poly (vinyl phenol) (PVPh)/ poly (ethylene oxide) (PEO) polymer blend within a wide range of temperatures. It was found that the glass transition began with the emergence of remarkable slow motions of the PVPh backbone segments, and ended when the CODEX signal intensity of segmental slow motion reached maximum. The SSNMR results revealed, at molecular level, that the onset and endpoint of conventional calorimetric glass transition are closely associated with the evolution of slow motions in this polymer blend.关键词
固体核磁共振/聚合物共混物/动力学/慢取向运动Key words
solid-state NMR(SSNMR)/polymer blend/dynamics/slow motion分类
数理科学引用本文复制引用
彭永进,孙平川,李宝会..PVPh/PEO共混物动力学演化过程的NMR研究[J].波谱学杂志,2016,33(2):188-197,10.基金项目
国家自然科学基金资助项目(20825416,21374051)；国家重点基础研究发展计划（“973”计划）资助项目(2012CB821503)． （20825416,21374051）
