Polymerization of Vinyl Acetate Initiated by Hydrosilane in the Presence of Platinum Complex

Ming Yuan; Wenxian Zhu; Jiaxing Lv; Panpan Zhang; Huadong Tang

doi:10.7317/pk.2021.45.3.428

주제분류

...

저널정보

한국고분자학회
폴리머 학술저널
폴리머 제45권 제3호
2021.5 428 - 436 (9page)
DOI : 10.7317/pk.2021.45.3.428

저자정보

Ming Yuan (Zhejiang University of Technology)
Wenxian Zhu (Zhejiang University of Technology)
Jiaxing Lv (Zhejiang University of Technology)
Panpan Zhang (Zhejiang University)
Huadong Tang (Zhejiang University of Technology)

이용수
내서재: 1

내서재에 추가
되었습니다. 내서재에서
삭제되었습니다.

초록·키워드

오류제보하기

In this work, a series of hydrosilanes including phenylsilane, diphenylsilane, triethylsilane (TES), and tris(trimethylsilyl)silane combined with catalytical amount of platinum complex such as dichloro(1,5-cyclooctadiene) platinum (COD) and dichloro(dicyclopentadienyl)platinum have been used to initiate the polymerization of vinyl acetate (VAc) at 70-95 ℃. An ultrahigh molecular weight PVAc with number-average molecular weight (M_n) up to 1.17×10⁶ Da and polydispersity index (PDI) of 2.59 has been synthesized using TES as an initiator in the presence of 9.7 ppm of COD. A kinetic study indicates that the polymerization at VAc/TES/COD molar ratio = 3.0×10⁵ : 60 : 1 smoothly reached 81.0% conversion in 28.0 h at 85 ℃, producing PVAc with M_n increasing linearly from 1.41×105 to 6.01×10⁵ Da with the increase of monomer conversion. A mechanistic investigation revealed that COD was firstly reduced by reductive TES, producing Pt nanoparticles and corresponding silane radicals to initiate the polymerization of VAc.

#vinyl acetate #polymerization #hydrosilane #kinetics #mechanism