中国塑料

中国塑料 ›› 2016, Vol. 30 ›› Issue (11): 32-36 .DOI: 10.19491/j.issn.1001-9278.2016.11.006

• 材料与性能 • 上一篇    下一篇

插层条件对蒙脱土/偶氮二甲酰胺复合发泡剂的影响及应用

王野1,尹晓刚 2,龚维1,陈卓1   

  1. 1. 贵州师范大学化学与材料科学学院2. 贵州师范大学
  • 收稿日期:2016-01-04 修回日期:2016-08-30 出版日期:2016-11-26 发布日期:2016-11-26

Effect of Intercalation Conditions on Montmorillonite/Azodicarbonamide Composite Foaming Agent and Its Applications

  • Received:2016-01-04 Revised:2016-08-30 Online:2016-11-26 Published:2016-11-26

摘要： 以超临界二氧化碳（scCO2）为介质，将偶氮二甲酰胺(AC)发泡剂插层到蒙脱土（MMT）中，制备MMT/AC复合发泡剂；通过红外光谱、热失重、X射线衍射和扫描电子显微镜分析方法对复合发泡剂进行表征；探究了插层条件对复合发泡剂中AC插层效果及MMT形貌的影响，以得到最优插层条件；结果表明，40 ℃、20 MPa、100 r/min为最优插层条件，且在此条件下最有利于改善MMT的团状结构；MMT/AC复合发泡剂在聚丙烯中注塑发泡无需添加发泡助剂，当注塑温度为190 ℃时，泡孔尺寸较均匀，泡孔孔径约为250 μm。

关键词: 超临界二氧化碳, 偶氮二甲酰胺, 蒙脱土, 复合发泡剂

Abstract: A composite foaming agent composed of montmorillonite (MMT) and azodicarbonamide (AC) was prepared by intercalating AC into MMT in supercritical CO2 medium, and then was characterized by Fourier-transform infrared spectroscopy, thermogravimetric analysis, powder X-ray diffraction and scanning electron microscopy. An optimum condition of 40 ℃, 20 MPa and 100 r/min for the supercritical intercalation was obtained on the basis of the investigation of intercalating effect and morphology of the ACintercalated MMT. The agglomeration structure of MMT was improved at this condition. The MMT/AC composite foaming agent could be directly used for the foaming process of polypropylene (PP) without any other additives. PP foams achieved a cell size of about 250 μm and a uniform size distribution at an injection molding temperature of 190 ℃.

Key words: supercritical carbon dioxide, azodicarbonamide, montmorillonite, composite foamingagent

京公网安备11010802034965号　 京ICP备13020181号-2
《中国塑料》编辑部 ©2008-2023 版权所有
地址:北京市海淀区阜成路11号　邮编：100048
编辑部：010-68985541　联系信箱：cp@plaschina.com.cn
广告部/发行部：010-68985253　本系统由北京玛格泰克科技发展有限公司设计开发