Study on the Synthesis of Low Molecular Weight Silicones Modified with Polyethers

저분자형 폴리에테르 변성 실리콘의 합성에 관한 연구

  • Chung, Dae-won (Department of Polymer Engineering, College of Engineering, Suwon University)
  • 정대원 (수원대학교 공과대학 신소재공학과)
  • Received : 2008.04.18
  • Accepted : 2008.05.24
  • Published : 2008.06.10

Abstract

Hydrosilylation reaction of 1,1,1,3,5,5,5-heptamethyl trisiloxane (HMTS) and unsaturated poly(oxyethylene) (UPOE) was carried out in the presence of Speier's catalyst. The effect of molar ratio of two reagents on the reactivity and the structure of the product (HMTS-POE) were investigated by FT-IR and $^1H-NMR$. The pure HMTS-POE without containing unreacted HMTS or UPOE could be obtained by the reaction with excess amount of HMTS and followed by removing unreacted HMTS under vacuum. Under the same reaction conditions, various HMTS-POEs composed of UPOEs with a different molecular weight were synthesized, and the surface tensions of HMTS-POEs were analyzed. HMTS-POE, whose EO contents are in the range of 49~57%, exhibited lower surface tension and a potential application for low molecular weight silicone modified with polyethers.

Acknowledgement

Supported by : 산업자원부

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