Synthesis of functional polyolefins via chain-end modification reactions = 말단기 개질반응을 이용한 기능성 폴리올레핀 합성연구

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This thesis deals with functional polyolefins consisting of polyolefin chains and other functional groups, which allow unique properties such as compatibility and self-healability. It consists of three chapters, concerning the functionalized polyolefins prepared through a combination of coordination polymerization and controlled living radical polymerization/grafting techniques as well as their unique properties. In chapter 2, end-functionalized poly(ethylene-co-propylene) (PEP) macro RAFT chain transfer agents were prepared by a series of end functionalization of PEP with the vinylidene end group via thiol-ene ‘Click’ reaction and esterification. By using these PEP macro chain transfer agents, the controlled living radical polymerizations of styrene were carried out to give PEP-b-PS block copolymers. SEM observation of PE/PS blends compatibilized with the block copolymer revealed that the size of PS domain dispersed in PEP matrix became finer in the range of 5~10μm. Chapter 3 includes synthesis of photo-responsive block copolymer based on end-functionalized PEP macro chain transfer agent. The end-functionalized PEP copolymer was employed as a macro RAFT chain transfer agent for controlled radical polymerization of 7-ethoxy-4-methyl-coumrinm methacrylate and 2-ethylhexylacrylate. 1H NMR analysis confirmed that the chain extension of end-functionalized PEP copolymer from macro CTA was successful PEP-based block copolymers. The block copolymers showed interesting photo-responsive properties like photo-coupling and photo-dissociation under the condition of UVA and UVC irradia-tion. Furthermore, it was shown that the intentional damage of the polymer film disappeared with the irradiation of UV light. In chapter 4, side-chain functionalized polyolefin was prepared by the synthesis of reactive polyolefin from ethylene and 5-ethylidenenorbornene followed by thiol-ene ‘Click’ reaction with mercaptoproponicacid, and esterification with the reagents which can undergo...
Kim, Sang-Youlresearcher김상율
한국과학기술원 : 화학과,
Issue Date
568656/325007  / 020105156

학위논문(박사) - 한국과학기술원 : 화학과, 2014.2, [ viii, 64 p. ]


Functional polyolefin; 자기치유 고분자; 열감응형 폴리올레핀; 광기능성 폴리올레핀 아클릴레이트 블록공중합체; 상용화제; 기능성 폴리올레핀; compatibilizer; Photo-sensitive polyolefin-acrylate block copolymer; Thermo-sensitive polyolefin copolymer; Self-healing polymer

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