Elastomers and Composites

The Rubber Society of Korea (한국고무학회)
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Preparation of Polyolefin Based Segmented Copolymers Through Controlled Radical Polymerization Technique

조절 라디칼 중합법에 의한 폴리올레핀 기반 분절 공중합체의 제조

  • 홍성철 (세종대학교 나노공학과) ;
  • 이성훈 (현대자동차 고분자재료연구팀) ;
  • 조현철 (현대자동차 고분자재료연구팀)
  • Published : 2009.09.30
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Abstract

Polyolefins are important commodity polymers with the largest volume of business owing to their outstanding combination of cost performance and excellent physical properties. However, the lack of functional groups often has limited their end uses, such as compatibilizer, modifier and adhesive, where the interaction with other materials is especially important. The incorporation of functional groups as polymer segments to afford block or graft polyolefin copolymers has been extensively investigated in the context of the functional polyolefin hybrids. Living polymerization processes have been considered to be an efficient method to prepare the polyolefin hybrids with precisely controlled architecture and compositions. Among the living polymerization techniques, controlled/"living" radical polymerization (CRP) methods are very effective not only because of the controllability of polymerization but also because of the versatility of monomers and polymerization conditions. In this review paper, progresses on the preparations of polyolefin graft or block copolymers through CRP techniques are summarized. The commodity polymers such as polyisobutylene, polyethylene and polypropylene are combined with polar segments such as polyacrylate, polymethacrylate, polystyrene to yield functionalized polyolefins.

폴리올레핀은 뛰어난 물성과 낮은 가격으로 인하여 가장 큰 시장을 가진 범용 고분자이다. 그러나, 폴리올레핀은 대표적인 비극성 고분자로, 다른 물질과의 상호 작용이 중요한 상용화제, 개질제, 접착제 등의 용도로는 그 사용이 제한될 수 밖에 없다. 따라서, 보다 극성을 가진 고분자 사슬을 폴리올레핀에 블록 또는 그라프트 공중합체의 형태로도입함으로써 기능성 폴리올레핀 하이브리드를 제조하려는 노력이 계속되어 왔다. 특히, 잘 제어된 구조와 조성을 가진 공중합체를 제조하기 위하여 리빙라디칼 중합법이 사용될 수 있으며, 그 중 조절라디칼 중합법은 중합을 잘 제어할 수 있다는 장점 이외에 다양한 단량체종과 중합 공정에 적용될 수 있다는 점에서 많은 주목을 받고 있다. 이에 따라, 본 리뷰 논문에서는 조절라디칼 중합법을 이용한 폴리올레핀 기반 블록 또는 그라프트 공중합체의 제조에 대하여 정리해 보았다. 폴리이소부틸렌, 폴리에틸렌, 폴리프로필렌 등의 비극성 범용고분자들과 폴리아크릴레이트, 폴리메타아크릴레이트, 폴리스티렌 등의 극성 고분자들과의 하이브리드를 통한 기능성 폴리올레핀의 제조에 대하여 정리하였다.

Keywords

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