Effects of Foaming Process and Supercritical Carbon Dioxide Induced Crystallization on Foaming Behavior of Polycarbonate

被引：0

作者：

Wu Z. ^{[1
]}

Zheng X. ^{[1
]}

Gong L. ^{[1
]}

Wang F. ^{[1
]}

Yang Z. ^{[1
]}

Zhang L. ^{[1
]}

Bao J. ^{[1
]}

机构：

[1] School of Material Science and Chemical Engineering, Ningbo University, Ningbo

来源：

Cailiao Daobao/Materials Reports | 2020年 / 34卷 / 04期

关键词：

Foaming behavior; Induced crystallization; Polycarbonates; Supercritical carbon dioxide;

D O I：

10.11896/cldb.19040047

中图分类号：

学科分类号：

摘要：

In this work, polycarbonate (PC) microcellular foams were prepared by supercritical carbon dioxide (scCO2) foaming technology. The effects of saturation temperature, saturation pressure, saturation time as well as polycarbonate crystallization induced by scCO2 on foaming beha-vior were systematically studied. PC foams with various expansion ratio were prepared by tuning foaming parameters, and the cell structures were observed by SEM. It was found that not only the foaming parameters of foaming temperature, scCO2 pressure but also scCO2 saturation time affec-ted PC foaming behavior. Moreover, scCO2 saturation time is the main influencing factor to PC foaming behavior. The crystallization behavior of foams was investigated by wide-angle X-ray diffraction. It was indicated that polycarbonate crystallization could be induced at a certain temperature and pressure, and the crystallinity increased with saturation time increasing, which restricts the cell growth. Therefore, a uniform cell structure of PC foams could be obtained at a certain temperature, pressure and saturation time. © 2020, Materials Review Magazine. All right reserved.

引用

页码：08200 / 08204

页数：4

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