ISOTACTIC AND SYNDIOTACTIC POLY-(2-VINYLPYRIDINE 1-OXIDE) AND 2-VINYLPYRIDINE OXIDE-2-N-PROPENYLPYRIDINE OXIDE COPOLYMER - NUCLEAR MAGNETIC RESONANCE AND ULTRAVIOLET SPECTRA VISCOSITIES AND REACTIONS WITH SILICIC ACIDS

被引:19
作者
HOLT, PF
LINDSAY, H
机构
[1] Department of Chemistry, The University, Reading, Whiteknights Park
来源
JOURNAL OF THE CHEMICAL SOCIETY C-ORGANIC | 1969年 / 06期
关键词
D O I
10.1039/j39690001012
中图分类号
O62 [有机化学];
学科分类号
070303 ; 081704 ;
摘要
Isotactic and syndiotactic poly-(2-vinylpyridine 1-oxide) and an atactic copolymer of vinylpyridine 1-oxide and 2-n-propenylpyridine 1-oxide have been prepared. The n.m.r. spectra have been related to their structures and have confirmed the earlier observations that there is bonding between the oxygen and α-hydrogen in each polymer. The viscosity of the isotactic form is increased by 0.005M-monosilicic acid but that of the other two is decreased. Monosilicic acid shifts the u.v. spectrum of the isotactic polymer but not the spectra of the syndiotactic or copolymer. Poly(silicic acid) shifts the spectra of all three. The observations are consistent with the spiral structure for the isotactic and the planar zig-zag for the syndiotactic polymer.
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页码:1012 / &
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