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Synthesis of Mid-range Vinylidene Content Polyisobutylene by Using BF3/Alcohol Catalyst

삼불화붕소 착물촉매를 사용한 중반응성 폴리부텐의 합성

  • Park, Min-Sup (Department of Chemistry, Chungnam National University) ;
  • Kim, Yeong-Joon (Department of Chemistry, Chungnam National University)
  • 박민섭 (충남대학교 자연과학대학 화학과) ;
  • 김영준 (충남대학교 자연과학대학 화학과)
  • Received : 2018.01.30
  • Accepted : 2018.02.27
  • Published : 2018.06.10

Abstract

Mid-range vinylidene content polyisobutylenes were prepared by using a Lewis acid catalyst. The best results were obtained when a complex catalyst composed of n-propanol as a cocatalyst and $BF_3$ as a main catalyst was used at the reaction temperature of -8 to $5^{\circ}C$ under a pressure of $2.5kg/cm^2$. The number average molecular weight ($M_n$) and viscosity of the polyisobutylenes were 500~1,000 g/mol and 20~210 cSt (at $100^{\circ}C$), respectively. The vinylidene content was 40~70% and easily varied by adjusting the reaction temperature.

Acknowledgement

Supported by : 충남대학교

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