LOCAL PACKING IN GLASSY POLYCARBONATE BY CARBON-DEUTERIUM ROTATIONAL-ECHO DOUBLE-RESONANCE NMR .2.

被引：17

作者：

LEE, PL ^{[1
]}

SCHAEFER, J ^{[1
]}

机构：

[1] WASHINGTON UNIV,DEPT CHEM,ST LOUIS,MO 63130

来源：

MACROMOLECULES | 1995年 / 28卷 / 06期

关键词：

D O I：

10.1021/ma00110a028

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Continuing our work of measuring intermolecular distances in C-13,H-2-labeled polycarbonate using rotational-echo double-resonance C-13 NMR with H-2 dephasing, we report average nearest-neighbor interchain ring-carbon to ring-deuterium and ring-carbon to methyl-deuterium distances of 2.6 and 3.2 Angstrom, respectively. The short ring-ring distance indicates that the phenyl groups are tightly packed, consistent with the observation that cooperative intermolecular motion is required for ring flips.

引用

页码：1921 / 1924

页数：4

共 15 条

[1]

BOPYER RF, 1975, POLYM MATERIALS RELA, P308

[2] A SIMPLE MAGIC ANGLE SPINNING NMR EXPERIMENT FOR THE DEPHASING OF ROTATIONAL ECHOES OF DIPOLAR COUPLED HOMONUCLEAR SPIN PAIRS [J].