MICROSCOPIC DYNAMICS IN CHLORAL POLYCARBONATE BY CROSS-POLARIZATION MAGIC-ANGLE SPINNING C-13 NMR-SPECTROSCOPY

被引：12

作者：

POLIKS, MD ^{[1
]}

SCHAEFER, J ^{[1
]}

机构：

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

来源：

MACROMOLECULES | 1990年 / 23卷 / 10期

关键词：

D O I：

10.1021/ma00212a015

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

The centerband of the 13C dipolar powder pattern observed in a dipolar rotational spin-echo experiment on the resolved protonated aromatic carbon resonance of chloral polycarbonate at room temperature is more pronounced than the corresponding centerband for bisphenol A polycarbonate. We attribute this extra intensity to additional averaging of H-C dipolar interactions by restricted motions about ring and main-chain axes in chloral polycarbonate. None of the rings in the chloral polycarbonate main chain are observed to undergo motions such as full ring rotation or isotropic rotational reorientation. © 1990, American Chemical Society. All rights reserved.

引用

页码：2682 / 2685

页数：4

共 17 条

[1]

BENDLER JT, 1989, PHYS TODAY JAN, pS31

[2] TWO-DIMENSIONAL SOLID-STATE NMR-SPECTROSCOPY - NEW POSSIBILITIES FOR THE INVESTIGATION OF THE STRUCTURE AND DYNAMICS OF SOLID POLYMERS [J].