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Improved adhesion of silicone rubber to polyurethane by induced surface reconstruction
Author(s) -
Tsai MingFu,
Lee YuDer,
Ling YongChien
Publication year - 1998
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/(sici)1097-4628(19981128)70:9<1669::aid-app4>3.0.co;2-2
Subject(s) - materials science , polydimethylsiloxane , silicone rubber , polyurethane , composite material , silicone , curing (chemistry) , polybutadiene , natural rubber , elastomer , attenuated total reflection , mold , hydroxyl terminated polybutadiene , surface tension , surface modification , adhesion , polymer chemistry , copolymer , polymer , fourier transform infrared spectroscopy , chemical engineering , physics , quantum mechanics , engineering
Induced surface reconstruction of silicone rubber by blending polydimethylsiloxane (PDMS) reactants with bifunctional PDMS‐hydroxyl terminated polybutadiene (PDMS‐ b ‐HTPB) copolymers and curing with appropriate mold material was attempted to improve the adhesion of chemically inert silicone rubber to polyurethane (PU). Surface characterization using Fourier transform infrared‐attenuated total reflectance indicated that the surface of the silicone rubber possessed a controlled amount of HTPB. The surface was enriched with HTPB by using mold materials having high critical surface tension, such as aluminum. A dynamic surface rearrangement occurred during a 1‐h heating cycle at 70°C, changing from an HTPB‐enriched surface to a PDMS‐enriched surface. The peel strength between the silicone rubber and PU was found to increase with decreased propanol residue and with an increase in critical surface tension of the molding materials. The increased content of surface HTPB was suggested to account for the improved adhesion of silicone rubber to PU. © 1998 John Wiley & Sons, Inc. J Appl Polym Sci 70: 1669–1675, 1998