Studies of cyclic and linear poly(dimethylsiloxanes): 34 - Preparation, fractionation and characterisation of the first per-deuterated macrocyclic poly(dimethylsiloxanes)

被引：12

作者：

Dagger, AC ^{[1
]}

Semlyen, JA ^{[1
]}

机构：

[1] Univ York, Dept Chem, York YO10 5DD, N Yorkshire, England

来源：

POLYMER | 1999年 / 40卷 / 11期

关键词：

per-deuterated poly(dimethylsiloxanes); cyclic polymers; neutron scattering;

D O I：

10.1016/S0032-3861(98)00605-3

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

A range of per-deuterated cyclic poly(dimethylsiloxanes) (PDMS) have been conveniently prepared in a high dilution reaction from bis(trideuteriomethyl)diphenylsilane using a catalytic amount of trifluoromethanesulphonic (triflic) acid in the presence of water as proposed. The cyclic and linear per-deuterated polymers produced have been separated and the cyclics fractionated by preparative gel permeation chromatography (GPC). The resulting sharp fractions of per-deuterated cyclic PDMS have been obtained in up to 0.6 gram quantities ranging in size from 45 to 605 number-average number of skeletal bonds, ail with dispersities less than 1.2. The purity of the samples obtained has been verified by various analytical techniques and these materials will allow the first studies of the conformations and properties of cyclic polymers in chemically identical blends using neutron scattering. (C) 1999 Elsevier Science Ltd. ALI rights reserved.

引用

页码：3243 / 3245

页数：3

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