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논문 기본 정보
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- 학위논문
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- 2016
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이 논문의 연구 히스토리 (2)
2016
Formation of Polyolefin-block-Polystyrene: Combination of Coordination Polymerization and Anionic Polymerization in One-Pot
박수현
,
이분열
한국고분자학회 학술대회 연구논문 초록집
2016.04
학술대회자료
Anionic styrene polymerization in the presence of dialkylzinc for Polyolefin-Polystyrene block copolymers
박수현
분자과학기술학과
2016.01
학위논문
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초록· 키워드
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The two representative bulk polymers, polyolefin (PO) and polystyrene (PS) were molecularly connected to form PO-block-PS by sequential performance of the coordination and the anionic polymerizations in one pot. Ethylene/1-octene copolymerization was performed using a typical ansa-metallocene catalyst rac-[Me2Si(2-methylindenyl)]2ZrCl2 activated MMAO in the presence of di(alkyll)zinc to grow PO-chains attaching to zinc site. The anionic polymerization was subsequently performed by feeding nBuLi?(tmeda) (tmeda, N,N,N'',N''-tetramethylethylenediamine) initiator and styrene monomer to grow PS-chains at the zinc site consequently attaching to PO-chains. Addition of tmeda played a key role in the growth of the PS-chains at the zinc site. Preparation of other type of PO-based block copolymers is an hot issue in the field of the controlled polymerization. So we found new zinc compound for Polyolefin-Polystyrene copolymers which has 4-(isopropenyl)benzyl. And researching on reactivity of ?a-methylstyrene.
목차
Abstract…………………………………………………………...……………… I1. Introduction ....................................................................................................... 12. Results and Discussion ...................................................................................... 32.1 Anionic styrene polymerization in the presence of dialkylzinc.............. 32.2 Reactivity of ?-methylstyrene. ……......................................................... 63. Conclusions ....................................................................................................... 124. Experimental Section ....................................................................................... 134.1 General remarks…………………………………................................... 134.2 Typical anionic styrene polymerization in the presence of (hexyl)2Zn.134.3 Polymerization. ………………………………………………………… 144.4 Synthesis of [4-(isopropenyl)benzyl]2Zn ……………………………... 144.5 Reaction of (sheme3. (a)) ……………………………………………… 154.6 General method of NMR Study ………………………………………. 165. Acknowledgements.......................................................................................... 176. Reference ......................................................................................................... 187. Supporting information .................................................................................. 21
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