SILICA SILOXANE MIXTURES - SURFACE SATURATION PROCESS OF PARTICLES - KINETICS

被引：20

作者：

GIRARD, O ^{[1
]}

COHENADDAD, JP ^{[1
]}

机构：

[1] UNIV JOSEPH FOURIER GRENOBLE 1,CNRS,SPECTROMETRIE PHYS LAB,BP 87,F-38402 ST MARTIN DHERES,FRANCE

来源：

POLYMER | 1991年 / 32卷 / 05期

关键词：

SILICA; SILOXANE; ADSORPTION; KINETICS;

D O I：

10.1016/0032-3861(91)90511-G

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 kinetics of adsorption of poly(dimethylsiloxane) chains on silica particles is observed from end-methylated chains at room temperature and several silica concentrations and from hydroxyl-terminated chains at several temperatures. The kinetics is interpreted as a progressive surface saturation process. The time constant of adsorption of methylated chains was found to be tau = 144, 52 and 39 h for silica concentrations equal to 0.09, 0.17 and 0.29 (w/w), respectively. For hydroxylated chains, tau was found to be equal to 124, 30 and 2 h at 323, 353 and 373 K, respectively. The activation energy of the process is 18 kcal mol-1.

引用

页码：860 / 863

页数：4

共 4 条

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[4]

COHENADDAD JP, 1989, POLYMER, V60, P1820

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