Improvement in mechanical properties and thermal stability of solvent‐based pressure‐sensitive adhesives based on triazine heterocyclic monomer

A heat-resistance monomer denoted as triazine heterocyclic compound (TGIC-AA) was synthesized and applied into improving the thermal stability of solvent-based acrylic pressure sensitive adhesives (PSAs) through copolymerization. The modified acrylic PSAs tapes possessed longer holding time at temperature up to 150 degrees C and no large areas of residues could be seen when peeled off on the substrate while the temperature of test was cooled down to room temperature. The thermal stability could be significantly enhanced in PSAs as the content of triazine heterocyclic compounds increased due to the extensive crosslinking networks. This indicated a worthy method to prepared heat resistant acrylic PSAs. An obvious reduction in peel adhesion occurred at the content of crosslinkers range 5 wt %-7 wt %, while beyond 7 wt % adhesion failure occurred. The influences of crosslinking density on the molecular weight, glass transition temperature and viscosity, etc. for PSAs were also studied. (c) 2015 Wiley Periodicals, Inc.