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KMID : 0385520170300040213
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Analytical Science & Technology
2017 Volume.30 No. 4 p.213 ~ p.219
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Temperature-dependent studies on catalytic hydrosilation of polyalkylsiloxane using NMR
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Sul Hye-Won
Lee Tae-Hee
Lim Eun-soo
Rho Ye-Cheol
Kim Chong-Hyeak
Kim Jeong-Kwon
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Abstract
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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-CH2-CH2-Si was directly observed using distortionless enhanced by polarization transfer (DEPT) technique. Successfully polyalkylsiloxane PSA samples exhibited excellent adhesion properties by cross-linking reaction.
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KEYWORD
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VT-NMR, catalytic hydrosilation, cross-linking, polyalkylsiloxane, pressure-sensitive adhesive
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