Foaming of EPDM with water as blowing agent in injection molding

被引：17

作者：

Hopmann, Christian ^{[1
]}

Lemke, Florian ^{[1
]}

Quoc Nguyen Binh ^{[2
]}

机构：

[1] Rhein Westfal TH Aachen, Inst Plast Proc IKV, Seffenter Weg 201, D-52074 Aachen, Germany

[2] KMUTNB, Sirindhorn Int Thai German Grad Sch Engn TGGS, Bangkok, Thailand

来源：

JOURNAL OF APPLIED POLYMER SCIENCE | 2016年 / 133卷 / 27期

关键词：

crosslinking; elastomers; foams; mechanical properties; rubber; THERMOPLASTIC ELASTOMERS; CO2; POLYSTYRENE;

D O I：

10.1002/app.43613

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Chemical foaming of elastomers is state of the art and preferred to the more complex systems engineering of physical foaming, yet, many commonly used chemical blowing agents often are hazardous. In current investigations, we introduced water bound to carrying substances (silica, carbon black) into elastomer compounds. A stable, reproducible foaming process can be implemented using water as physical blowing agent. In first tests, the average cell diameters in injection molded elastomer parts exceed the average cell diameters of chemically foamed parts. Yet, varied amounts of blowing agent can reduce the cell diameters. Furthermore, nucleating agents and water carriers are being examined to reduce cell diameters and reach cellular structures and mechanical properties of chemically foamed parts. In conclusion, foaming of elastomers with water is a promising. Yet, further examinations have to cover the effect mechanism of foaming and vulcanization as well as continuous processing and compounding. Rear end of an EPDM part foamed with water carried on silica in injection molding process (mold temperature 195 degrees C, breathing mold opening 2 mm) (c) 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016, 133, 43613.

引用

页数：11