【摘要】 本文描述了固体高分子在磁场中的行为.用固体高分辨¹³C 核磁共振（NMR）研究了不同条件下结晶聚乙稀的多相结构.利用化学位移、各相中弛予时问T_■e,T^2■的不同和不同的脉冲序列对结晶、界面、非晶相成分能够分别进行选择性观测.对定量测出的各成分量进行了讨论,并得到界面相厚度,和Flory 最近提出的格子模型理论计算值比较的结果说明:从较低分子量及稀溶液结晶的聚乙稀界面层厚度值和Flory 理论计算值一致.更多还原

【Abstract】 The behaviur of solid polymers in magnetic field has been described.Thephase structures of linear polyethylene（PE）in different conditions werestudied by the highresolution solid-state ¹³C NMR.Using chemical shifts,di-fferent relaxation times T_1c,T_2c in varions phases and different pulsesequences,crystalline phase,crystallineamorphous interphase,and amorphousphase were selectively detected and discussed.（The thicknesses of the interfa-cial phase can be caculated and have good agreement with Flory’s latticetheory in case of low MW and crystallization from dilute solution.）更多还原