Miscibility Improvement in PP and EPDM Blends via Introducing Specific Interaction

특정상호작용에 의한 폴리프로필렌/EPDM 블렌드의 상용성 향상

  • Cho, Young-Wook (Department of Polymer Science and Engineering, Pusan National University) ;
  • Go, Jin-Hwan (Department of Polymer Engineering, Chosun University) ;
  • Lee, Won-Ki (Department of Polymer Science and Engineering, Pusan National University) ;
  • Lee, Jin-Kook (Department of Polymer Science and Engineering, Pusan National University) ;
  • Cho, Won-Jei (Department of Polymer Science and Engineering, Pusan National University) ;
  • Ha, Chang-Sik (Department of Polymer Science and Engineering, Pusan National University)
  • 조영욱 (부산대학교 고분자공학과) ;
  • 고진환 (조선대학교 고분자공학과) ;
  • 이원기 (부산대학교 고분자공학과) ;
  • 이진국 (부산대학교 고분자공학과) ;
  • 조원제 (부산대학교 고분자공학과) ;
  • 하창식 (부산대학교 고분자공학과)
  • Published : 2000.03.31

Abstract

Miscibility improvement between polypropylene(PP) and ethylene-propylene-diene-terpolymer (EPDM) was studied by introducing specific interaction into both polymers. PP was modified by grafting maleic anhydride(MAH) onto backbone, leading to MAH-grafted PP(PP-g-MAH). Sulfonated EPDM ionomer neutralized with bivalent zinc cation(ZnSEPDM) was used as one component. The blends of PP-g-MAH and ZnSEPDM were prepared at $200^{\circ}C$ in Brabender Roller Mixer. Fourier transform-infrared(FT-IR) spectroscopic and dynamic mechanical studies have been performed to investigate the miscibility. FT-IR spectral peak corresponding to carbonyl group in PP-g-MAH and that to sulfonate group in ZnSEPDM were shifted to lower and higher frequency with increasing ZnSEPDM content, respectively, in the blends. Glass transition temperature of ZnSEPDM was increased up to 70wt.% of ZnSEPDM, and again decreased above 70wt.%. It can be concluded from the shift of FT-IR characteristic peaks and the changes of glass transition temperatures that the miscibility between PP and EPDM was improved via introducing specific interaction, i.e., dipole-ion interaction.