CONCENTRATED-SOLUTIONS OF PERFLUOROPOLYOXYALKYLENE OLIGOMERS .2. VISCOSITY AND DENSITY IN POLAR-SOLVENTS

被引：9
|
作者：
TURRI, S
SCICCHITANO, M
GIANOTTI, G
TONELLI, C
机构：
[1] Ausimont S.p.A., Centro Ricerche Sviluppo (CRS), 20021 Bollate, Milano
来源：
EUROPEAN POLYMER JOURNAL | 1995年 / 31卷 / 12期
关键词：
D O I：
10.1016/0014-3057(95)00100-X
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
Viscosities and densities of two low molecular weight perfluoropolyoxyalkylene diols in 11 polar solvents are analysed. The specific volume-concentration behaviour shows the presence of an excess mixing volume common to all the solvents tested. Plots of viscosity data vs solvent volume fraction and solvent molar fraction are compared. This last correlation allows a generalization of the phenomenology of concern, according to peculiar solubility mechanisms mainly ruled by interactions between solvent and end units. The behaviour of a large number of different binary mixtures is consequently described by means of a few ''collective'' relations which take into account changes in viscosity of solutions due to the solvent choice.
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页码：1235 / 1242
页数：8
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