Article
  • Preparation and Characteristics of Liquid Silicone Rubber Using Polyorganosiloxane Modified with Dimethylacrylamide
  • Kang DW, Lee BC
  • 디메틸아크릴아마이드 변성 폴리오가노실록산을 이용한 액상 실리콘 고무의 제조와 그 특성
  • 강두환, 이병철
Abstract
α,ω-Hydrogen polyorganosiloxane (HPMDMS) prepolymer was prepared from equilibrium polymerization of octamethylcyclotetrasiloxane, 1,3,5-trimethylcyclotrisiloxane, 1,3,5,7-tetravinyl-1,3,5,7-tetramethyl-cyclotetrasiloxane, and 1,1,3,3-tetramethyl disiloxane as an end-blocker in the presence of tetramethylammonium siloxanolate as a catalyst. Polyorganosiloxane modified with dimethylacrylamide (APMDMS) was prepared by hydroxilylation of HPMDMS with dimethylacrylamide in the presence of Pt catalyst, and followed by coordination of metal oxide (APMDMS-MO), such as NiO and FeO, to the amide moieties of the resulting polymer. The chemical structures of HPMDMS and APMDMS were confirmed by FT-IR and 1H-NMR analysis. Liquid silicone rubber containing metal oxide composite (LSRMO) was prepared by compounding APMDMS-MO, α,ω-vinylpolydimethylsiloxane, and a catalyst in a high speed dissolver. The thermal conductivity of LSRMO composite was determined to be 0.29 W/mK, and the volume resistivity exhibited a lower value than that of LSR composite. The mechanical and thermal properties of LSRMO and LSR composite were measured by UTM and TGA.

옥타메틸싸이클로테트라실록산과 1,3,5-트리메틸싸이클로트리실록산 및 1,3,5,7-테트라비닐-1,3,5,7-테트라메틸싸이클로테트라실록산을 테트라메틸암모늄 실록산올레이트 촉매 하에서 1,1,3,3-테트라메틸디실록산과 평형중합으로 이들을 공중합시켜 α,ω-하이드로겐 폴리(메틸-디메틸-메틸비닐)실록산 전구체를 제조하였다. 제조된 α,ω-하이드로겐 폴리(메틸-디메틸-메틸비닐)실록산 전구체에 디메틸아크릴아마이드를 백금촉매 작용 하에서 반응시켜 아크릴아마이드 변성 α,ω-하이드로겐 폴리(메틸-디메틸-메틸비닐)실록산 전구체(APMDMS)를 제조하였으며 여기에 금속산화물인 NiO, FeO를 배위결합시켜 금속산화물이 2차 결합으로 부가된 APMDMS-MO를 제조하였다. 제조된 화합물의 구조를 FT-IR과 1H-NMR로 분석하여 확인하였다. α,ω-비닐 폴리디메틸실록산과 APMDMS-MO를 백금촉매 존재 하에서 컴파운딩시켜 금속산화물 함유 액상 실리콘 고무 복합체를 제조하였으며, 이 화합물을 이용하여 제조된 쉬이트의 열 전도도는 0.29 W/mK로 액상 실리콘 고무 복합체의 0.215 W/mK 보다 우수하였고 체적 저항은 1.64 ×105Ω·cm로 낮은 값을 나타내었다. 또한 디메틸아크릴아마이드 변성 액상 실리콘 고무 복합체의 기계적 및 열적특성은 UTM과 TGA로 측정하였다.

Keywords: hydrosilylation; equilibrium polymerization; α,ω-hydrogen polyorganosiloxane

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  • Polymer(Korea) 폴리머
  • Frequency : Bimonthly(odd)
    ISSN 0379-153X(Print)
    ISSN 2234-8077(Online)
    Abbr. Polym. Korea
  • 2022 Impact Factor : 0.4
  • Indexed in SCIE

This Article

  • 2004; 28(2): 143-148

    Published online Mar 25, 2004

  • Received on Oct 10, 2003
  • Accepted on Feb 9, 2004