We report the organotellurium-mediated living radical polymerization (TERP) using dialkylditellurides in the presence of a binary azo initiator system with different decomposition rates for the facile synthesis of high-molecular-weight block copolymers containing a polar side group. The block copolymers containing the poly(tert-butyl acrylate) (PtBA) sequence as the reactive segment and the random copolymer sequences of n-butyl acrylate (nBA) or 2-ethyhexyl acrylate (2EHA) with 2-hydroxyethyl acrylate (HEA) as the adhesive segment were synthesized. The produced block copolymers exhibited a high performance for the dismantlable adhesion responding to the dual external stimuli of photoirradiation and postbaking in the presence of a photoacid generator. The change in the peel strength before and after the UV irradiation and postbaking was investigated and the mechanism of the superior adhesion and dismantling properties of the block copolymer adhesives was revealed based on the results of the peel test, DSC and AFM analyses of the adhesives, as well as the model reactions of the cross-linking formation by transesterification. We have demonstrated that the precisely-controlled living radical polymerization technique is important for the fabrication of high-performance adhesive polymer materials with high molecular weights and a controlled molecular weight distribution containing polar repeating units. 

On-demand dismantlable adhesion system using acrylate block copolymers in response to photoirradiation and postbaking as dual stimuli

247th National Meeting (2014)

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