摘要
用固体高分辨NMR系统地研究了几种典型的均聚物,共聚物,聚合物共混物以及用接枝共聚物增容的不相容聚合物共混体系的13C自旋-晶格弛豫特性。研究结果表明:13C自旋-晶格弛豫时间(T1(C))是表征固体聚合物体系的很有用参数,它能提供有关本体聚合物微观形态结构的信息,并可望建立聚合物的微观结构与宏观性能的关系,它不仅能准确无误地反映共混体系中可能存在的各种相互作用,而且能定性地给出相互作用的大小和准确地指明相互作用产生的位置,因而为揭示共混体系的相容机理提供了最直接的证据。
C spin-lattice relaxation times (T 1(C)) of several typical polymers, copolymers, polymer blends and immiscible blends compatibilized by graft copolymer have been measured by 13 C CPMAS NMR technique. The results show that T 1(C) is auseful parameter for characterizing solid polymers, as it can provide information about microscopic morphologic structure and molecular motion of solid polymers. It not only can tell whether or not some intermolecular interactions exist in a blend sys ̄tem, it can also qualitatively show the strength of the intermolecular interaction and accurately indicate the site where the intermolecular interaction occurs. Therefore, it can provide a direct experimental evidence for exploring the miscible mechanism of a polymer blend .Besides, T 1(C) value can give a direct experimental evidence, which can not be obtained so far by other techniques, for compatibilizers connecting the two immiscible components.
出处
《高分子学报》
SCIE
EI
CAS
CSCD
北大核心
1996年第6期683-689,共7页
Acta Polymerica Sinica
基金
国家基础性关键项目
中国科学院武汉物于研究所波谱与原子分子物理国家重点实验室以及中国科学院武汉分院分析测试中心资助
关键词
自旋
晶格弛豫
微观形态结构
聚合物
相容性
C spin-relaxation properties, Microscopic morphologic structure, Polymer, Miscibility, Compatibilization effect