X-ray studies on compositions of polyurethane and silica

被引：73

作者：

Nunes, RCR

Pereira, RA

Fonseca, JLC

Pereira, MR

机构：

[1] Univ Fed Rio Grande Norte, Dept Quim, BR-59078970 Natal, RN, Brazil

[2] Univ Fed Rio de Janeiro, Inst Macromol, BR-21945970 Rio De Janeiro, Brazil

[3] Ctr Brasileiro Pesquisas Fis, BR-22290180 Rio De Janeiro, Brazil

来源：

POLYMER TESTING | 2001年 / 20卷 / 06期

关键词：

polyurethane elastomer; precipitated silica; X-ray; crystallization; chain orientation;

D O I：

10.1016/S0142-9418(01)00007-1

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Compositions of polyurethane elastomer and precipitated silica were investigated by X-ray. The elastomer was characterized as a polyurethane based on 4,4-diphenylmethane diisocyanate (MDI), a low molecular weight polyester derived from adipic acid and 1,4-butanediol. The precipitated silica was submitted to thermal treatment in order to eliminate the surface hydroxyl groups. The mixtures were made into solutions using THF (tetrahydrofuran) as solvent. The silica concentration was 5 phr. The influence of two kinds of silica (thermally treated and non-thermally treated) on the crystallinity index and chain orientation was investigated. Based on the experimental results, propositions have been formulated to explain the different behaviors observed for the polyurethane-filler systems analyzed. (C) 2001 Elsevier Science Ltd. All rights reserved.

引用

页码：707 / 712

页数：6

共 24 条

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