Properties of PA 6,6/Elastomer Blends with Various Elastomer Content

탄성중합체 함유량 변화에 따른 폴리아미드-6,6/탄성중합체 블랜드물의 특성

  • Lee, Yoong (Department of Chemical Engineering, College of Eng., Dankook Univ.) ;
  • Lee, Chang-Woo (Department of Chemical Engineering, College of Eng., Dankook Univ.) ;
  • Cho, Yoon-Ho (Department of Chemical Engineering, College of Eng., Dankook Univ.) ;
  • Hahm, Yeong-Min (Department of Chemical Engineering, College of Eng., Dankook Univ.)
  • 이융 (단국대학교 공과대학 화학공학과) ;
  • 이창우 (단국대학교 공과대학 화학공학과) ;
  • 차윤호 (단국대학교 공과대학 화학공학과) ;
  • 함영민 (단국대학교 공과대학 화학공학과)
  • Published : 1999.03.31

Abstract

In this study, binary polyamide 6,6(PA 6,6)/ethylene-propylene rubber(EPM) or EPM-g-maleic anhydride(EPM-g-MA) blends and ternary PA 6,6/EPM/EPM-g-MA blends with various elastomer content were prepared in order to investigate the degree of influence of elastomer content and average particle size, morphology, and distribution of dispersed elastomer on mechanical and thermal properties of blends. According to the results, notched Izod impact strength and relative crystallinity of binary blends modified with EPM-g-MA as well as average particle size and distribution of dispersed elastomer in such blends were more improved than those of binary blends modified with EPM. Notched Izod impact strength of blend whose composition ratio(wt % ) was 70:30(PA 6,6 : EPM-g-MA) was the highest among the binary PA 6,6/EPM-g-MA blends. The impact strength was increased by 25 times and its relative crystallinity was increased by 7 times when compared with those of polyamide 6,6. In the case of ternary PA 6,6/EPM/EPM-g-MA blend of which composition ratio was 70:15:15(PA 6,6:EPM:EPM-g-MA), the elastomer was finely distributed with the average particle size of $0.56{\mu}m$. The Izod impact strength of this blend was the highest of all blends prepared with different elastomer content.