Elastomers and Composites

The Rubber Society of Korea (한국고무학회)
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Preparation of PP-g-IA and its Compatibilizing Effects in PP/EVOH Blends

PP-g-IA의 제조 및 이를 이용한 PP/EVOH 블렌드의 상용화 효과

  • Kim, Jung Soo (Human and Culture Convergence Technology R&BD Group, Korea Institute of Industrial Technology) ;
  • Jang, Ji-Hoon (Human and Culture Convergence Technology R&BD Group, Korea Institute of Industrial Technology) ;
  • Jeon, Dong-Gyu (Human and Culture Convergence Technology R&BD Group, Korea Institute of Industrial Technology) ;
  • Kim, Dong Hyun (Human and Culture Convergence Technology R&BD Group, Korea Institute of Industrial Technology)
  • 김정수 (한국생산기술연구원 휴먼문화융합실용화연구그룹) ;
  • 장지훈 (한국생산기술연구원 휴먼문화융합실용화연구그룹) ;
  • 전동규 (한국생산기술연구원 휴먼문화융합실용화연구그룹) ;
  • 김동현 (한국생산기술연구원 휴먼문화융합실용화연구그룹)
  • Received : 2014.07.31
  • Accepted : 2014.08.25
  • Published : 2014.09.30
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Abstract

In this study, we used polypropylene grafted with itaconic acid (PP-g-IA) as a compatibilizer to prevent phase separation phenomenon which occurs upon blending polypropylene (PP) and ethylene-vinyl alcohol copolymer (EVOH). A compatibilizer was prepared using graft copolymerization of itaconic acid (IA) onto PP where input ratio of IA was 1, 2, 5, and 10 wt.%. To confirm the structure of PP-g-IA and the graft ratio of IA onto PP, we used $^1H$ NMR and FT-IR. We tested the compatibilizer which has highest graft ratio of 1% in immiscible PP/EVOH blends. The morphologies of PP/PP-g-IA/EVOH blends were analyzed by SEM. Thermal and mechanical properties of the blends were analyzed by DSC and UTM. PP-g-IA enhanced the interfacial adhesion of PP and EVOH copolymer.

본 연구에서는 폴리프로필렌 (PP)과 에틸렌 비닐알코올 공중합체 (EVOH)의 블렌드에 있어 발생하는 상분리 현상을 방지하고자 PP에 itaconic acid (IA)가 그라프트 된 PP-g-IA 를 상용화제로 이용하였다. PP-g-IA 상용화제는 PP base에 IA의 투입량을 1, 2, 5, 10 wt.% 로 달리하면서 투입하여 제조하였으며, FT-IR과 $^1H$ NMR 분석을 통하여 성공적으로 PP에 IA가 그래프트 되었음을 확인하였다. 이 중 그래프트율이 1% 로 가장 높게 나타난 PP-g-IA 상용화제를 PP/EVOH 블렌드 연구에 적용하였다. 신규 상용화제가 적용된 PP/EVOH 블렌드는 SEM을 이용하여 모폴로지를 관찰하였고, DSC 와 UTM를 이용하여 열적 기계적 특성을 분석하였다. 분석 결과, PP-g-IA 상용화제는 PP/EVOH 블렌드의 계면접착력을 향상시키는 것으로 나타나 상용화제로써의 유효성이 확인되었다.

Keywords

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