The effect of surface morphology on the peel performance of UV-induced adhesion-reducing adhesives

Abstract In this paper, end-hydroxy fumaryl chloride-diol copolyesters (EHFDCP) with different double bond contents were prepared by the reaction of chloride and diols. The molecular weight target hydroxy polyesters was controlled to be essentially same, EHFDCP from 1,8-octanediol, 1,5-pentanediol ethylene glycol named EHFDCP-1, EHFDCP-2 EHFDCP-3, respectively. UV-induced adhesion-reducing adhesives (ARA) EHFDCP, isophorone diisocyanate (IPDI), chain extender photoinitiator. ARA-1, ARA-2 ARA-3 produced After UV curing, all surfaces ARA-2, had a high number concave convex areas, which helped reduce contact area between adhesive substrate surface. surface roughness is highest adhesion reduction effect most significant. higher came moderate content crosslinking density. With increasing photoinitiator content, 180° peel strength after curing decreased. reduced 0.16 N/25 mm at 4 wt% it also initial 18.55 due absence small molecule polyfunctional monomers.