Polypropylenes foam consisting of thermally expandable microcapsule as blowing agent

作     者：Sun Kyung Jeoung Ye Jin Hwang Hyun Wook Lee Sung Bok Kwak In-Soo Han Jin Uk Ha 

作者机构：aLightweight & Convergent Materials R&D Center Automotive Materials Convergence & System R&D Division Korea Automotive Technology Institute Chunan Chungnam 330-912 S. Korea bAdvanced Engineering Team Duckyang Ind. Co. Ltd Suwon Gyeonggi 443-766 S. Korea cPolymeric Materials Research Team Hyundai Motors Hwasung Gyeonggi 445-706 S. Korea 

出 版 物：《AIP Conference Proceedings》 

年 卷 期：2016年第1713卷第1期

学科分类：07[理学] 0702[理学-物理学] 

摘      要：The structure of thermally expandable microcapsule (TEMs) is consisted of a thermoplastic shell which is filled with liquid hydrocarbon at core. The shell of TEMs becomes soft when the temperature is higher than boiling temperature of liquid hydrocarbon. The shell of TEMs is expanded under the high temperature because the inner pressure of TEMs is increased by vaporization of hydrocarbon core. Therefore, the TEMs are applicable for blowing agents and light weight fillers. In this research, we fabricated the polypropylene (PP) foam by using the TEMs and chemical blowing agents and compared to their physical properties. The density of the specimen was decreased when the contents of chemical blowing agents and TEMs were increased. In addition, the mechanical properties (i.e. tensile strength and impact strength) of specimens were deteriorated with increasing amount of chemical blowing agents and TEMs. However, PP foam produced with TEMs showed higher impact strength than the one with the chemical blowing agent. In order to clarify the dependence of impact strength of PP foam as the blowing agent, the morphology difference of the PP foams was investigated. Expanding properties of PP foams produced with TEMs was changed with TEMs content of PP foams. Processing conditions also influenced the mechanical properties of PP foam containing TEMs.