Formation of bubbles during ultrasonic treatment of cured poly(dimethyl siloxane)

被引：20

作者：

Shim, SE ^{[1
]}

Ghose, S ^{[1
]}

Isayev, AI ^{[1
]}

机构：

[1] Univ Akron, Inst Polymer Engn, Akron, OH 44325 USA

来源：

POLYMER | 2002年 / 43卷 / 20期

基金：

美国国家科学基金会;

关键词：

poly(dimethyl siloxane); bubbles; ultrasound;

D O I：

10.1016/S0032-3861(02)00392-0

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 static ultrasonic treatment device was used to investigate the effect of ultrasound on degradation of unfilled poly(dimethyl siloxane) (PDMS) vulcanizate in the absence of shearing effect. The effects of pressure, ultrasound intensity and thickness of the disks upon ultrasonic treatment were investigated. The power consumption was measured as a function of sample thickness, ultrasonic amplitude, and applied pressure. The dynamics of bubble (nucleation, growth and coalescence) was also studied with respect to applied pressure and amplitude. An increase in thickness of the sample was observed during ultrasonic treatment. The unique correlation between gel fraction and crosslink density obtained in the present static experiments was compared with those of continuous devulcanization studied earlier. (C) 2002 Elsevier Science Ltd. All rights reserved.

引用

页码：5535 / 5543

页数：9

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