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Temperature-dependent studies on catalytic hydrosilation of polyalkylsiloxane using NMR

  • Sul, Hyewon (Center for Chemical Analysis, Korea Research Institute of Chemical Technology (KRICT)) ;
  • Lee, Tae Hee (Center for Chemical Analysis, Korea Research Institute of Chemical Technology (KRICT)) ;
  • Lim, Eunsoo (Center for Chemical Analysis, Korea Research Institute of Chemical Technology (KRICT)) ;
  • Rho, Yecheol (Center for Chemical Analysis, Korea Research Institute of Chemical Technology (KRICT)) ;
  • Kim, Chong-Hyeak (Center for Chemical Analysis, Korea Research Institute of Chemical Technology (KRICT)) ;
  • Kim, Jeongkwon (Department of Chemistry, Chungnam National University)
  • Received : 2017.06.02
  • Accepted : 2017.08.09
  • Published : 2017.08.25

Abstract

Polyalkylsiloxane has been spotlighted in pressure-sensitive adhesive (PSA) application due to excellent physical properties and good biocompatibility. Thermal behaviour of polyalkylsiloxane mixtures, such as thermal stability and heat flow, were studied using TG-DTA during catalytic hydrosilation. To understand reaction kinetics of cross-linking, catalytic hydrosilation of polyalkylsiloxane was monitored using variable temperature nuclear magnetic resonance (VT-NMR) as increased temperature. The formation of cross-linking bond $Si-CH_2-CH_2-Si$ was directly observed using distortionless enhanced by polarization transfer (DEPT) technique. Successfully polyalkylsiloxane PSA samples exhibited excellent adhesion properties by cross-linking reaction.

Keywords

VT-NMR;catalytic hydrosilation;cross-linking;polyalkylsiloxane;pressure-sensitive adhesive

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