Poly( t-butylstyrene) 그라프트를 가지는 수산기 말단 관능화 폴리올레핀 탄성체의 합성 = Synthesis of Multi Hydroxyl Chain-End Functionalized Polyolefin Elastomer with Poly(t-butylstyrene) Graft

다국어 초록 (Multilingual Abstract)

Polyolefin-g-poly(t-butylstyrene) as one of the high-temperature polyolefin-based thermoplastic elastomers was synthesized by the graft-from anionic living polymerization from the styrene moieties of the linear poly(ethylene- ter-1-hexene-ter-divinylbenzene) as a soft block to form the hard end blocks, poly(t-butylstyrene). The chemistry of the anionic graft-from polymerization involved complete lithiation of the pendant styrene unit of the soft polyolefin elastomer with sec-BuLi/TMEDA followed by the subsequent graft anionic polymerization of 4-tert-butylstyrene with Mn=10,000~30,000 g/mol. The graft-from living anionic polymerization were very effective and the grafting size increased proportionally with increasing monomer concentration and the reaction times. The synthetic methodology for the multi-hydroxyl chain-end modified polyolefin-g-poly(t-butylstyrene) was proposed by using the thiol-ene click reaction between 2-mercaptoethanol and the polyolefin- g-[poly(t-butylstyrene)-b-high vinyl polyisoprene], which was obtained from the subsequent living block copolymerization using polyolefin-g-Poly(t-butylstyrene) with isoprene. The result indicated that this process produced a new well-defined functionalized graft-type polyolefin-based TPE with high Tg hard block(> 145 ℃).

참고문헌 (Reference)

1 V. M. Monroy, 66 : 588-, 1993

2 T. C. Chung, 27 : 39-, 2002

3 H. L. Lu, 37 : 4176-, 1999

4 R. E. Cunningham, 22 : 2907-, 1978

5 K. Imaizumi, 39 : 13-, 2001

6 R. L. A. David, 41 : 1151-, 2008

7 J. Y. Dong, 36 : 6000-, 2003

8 N. ten Brummmelhuis, 41 : 9946-, 2008

9 J-F Lutz, 49 : 817-, 2008

10 A. B. Lowe, 1 : 17-, 2010

11 G. Holden, "Thermoplastic Elastomers" Hanser 2004