SI-29 NUCLEAR MAGNETIC-RESONANCE STUDIES OF OLIGOMERIC AND POLYMERIC SILOXANES .4. CHEMICAL-SHIFT EFFECTS OF END-GROUPS

被引：60

作者：

HARRIS, RK

ROBINS, ML

机构：

[1] School of Chemical Sciences, University of East Anglia, Norwich

来源：

POLYMER | 1978年 / 19卷 / 10期

关键词：

D O I：

10.1016/0032-3861(78)90057-5

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

29Si n.m.r. spectra have been obtained for mixtures of polysiloxane oligomers in four cases, viz. MDnM, MHDnMH, MOHDnMOH and MDHnM. Spectral dispersion is best (under the conditions studied) for the MOHDnMOH series, where signals due to oligomers up to n = 9 have been separately detected. The spectra have been fully assigned, and shift effects due to the end-groups (equivalent to shifts expected in long chain polymers) have been derived. The significance of the data is discussed. © 1978.

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页码：1123 / 1132

页数：10

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