물리적 가교를 이용한 EPDM의 물성 개선 및 재사용 가능성 연구

Abstract

The elastomers widely used throughout the industry, generally crosslinked using sulfur or peroxide. But after use, most of them are discarded without being recycled. And when storing, two problems occur. The first thing is a lot of space is required and the second thing is secondary contamination of dioxins. Therefore, reducing environmental pollution by reusing the waste is emerged as an important issue. For the recycling of these elastomers, variety of thermoplastic elastomers(TPE) has been developed and studied since the 1970s. The rubber/plastic blending phase characterizing like conventional thermal curing vulcanized rubber is manufactured by a method of thermoplastic vulcanizate. But crosslinking methods used in TPV have several problems with chemical cross-linking process and the limitations of recycling, so the development of a new crosslinking method is required. Ionomer is as a part of introducing physical crosslinking on behalf of chemical crosslinking. Therefore, in this study, intramolecular hydrogen bonding induced by adopting methacrylic acid to EPDM through grafting polymerization, and then ionic bonding induced by onium salts made from amine groups and carboxylic acids. Hydrogen bonding and ionic bonding were used as a method of physical crosslinking of elastomers, it seemed to enhance the effect of physical properties of EPDM, so the possibility of recycling was determined.