2010年4月
Thermally Expandable Microcapsules for Polymer Foaming-Relationship Between Expandability and Viscoelasticity
POLYMER ENGINEERING AND SCIENCE
- ,
- ,
- ,
- ,
- ,
- ,
- ,
- ,
- 巻
- 50
- 号
- 4
- 開始ページ
- 835
- 終了ページ
- 842
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1002/pen.21595
- 出版者・発行元
- WILEY
A new thermally expandable microcapsule was developed for use with foaming polypropylene (PP) by injection molding and extrusion processes at operating temperatures above 200 degrees C. The microcapsule consists of a blowing agent as the core and a shell polymer. The rheological properties of the shell polymer were controlled by a crosslinking agent to design the expandability and shrinkage. The effects of rheological properties on the expandability and the surface appearance of foam products were thoroughly investigated. It was found that storage modulus G' and tan delta significantly affected the expandability and shrinkage and were controllable through crosslinking polymerization. Visual observation of batch foaming, rheological measurement, and experiments of foam injection molding and extrusion elucidated the existence of the optimal degree of crosslinking that could realize more than 30% density reduction while maintaining a smooth surface at PP foam injection molding and extrusion. POLYM. ENG. SCI., 50:835-842, 2010. (C) 2009 Society of Plastics Engineers
- リンク情報
- ID情報
-
- DOI : 10.1002/pen.21595
- ISSN : 0032-3888
- eISSN : 1548-2634
- Web of Science ID : WOS:000276031000022