Author, as appears in the article.: Konuray O., Fernández-Francos X., Ramis X., Serra À.

Department: Química Analítica i Química Orgànica

URV's Author/s: Fernández Francos, Xavier / Serra Albet, Maria Angels

Keywords: Thiol Michael addition Methacrylate Dual-curing Click reaction Click chemistry Acrylate

Abstract: Soft poly(thioether) thermosets have been synthesized by employing a two-step curing procedure based on click chemistry. The first stage of curing is a thiol-Michael addition between acrylates (or methacrylates) and thiols in excess, catalyzed by a set of novel tertiary amine catalyst comonomers with allyl functionality. Subsequently, the pendant allyl groups of the comonomer get incorporated into the polymer network by undergoing thiol-ene UV photopolymerization with the remaining thiols. The strong catalysis by the high concentration of tertiary amine groups facilitates quantitative conversions at the end of the first stage. All remaining functional groups are depleted after a short period of UV irradiation. Final materials are clear, transparent, and exhibit homogeneous network structures with alpha relaxation temperatures in the range 3-25 °C. This sub-ambient relaxation temperature range suggests these materials may be suitable for coating applications where delicate substrates are involved such as plastic, wood and paper.

Thematic Areas: Química Polymers and plastics Polymer science Organic chemistry Medicina ii Materials chemistry Materiais Interdisciplinar Farmacia Engenharias iv Engenharias iii Engenharias ii Ciências biológicas ii Ciências biológicas i Ciências agrárias i Biotecnología Astronomia / física

ISSN: 00323861

Author's mail: xavier.fernandez@urv.cat angels.serra@urv.cat

Author identifier: 0000-0002-3492-2922 0000-0003-1387-0358

Last page: 377

Record's date: 2023-02-18

Journal volume: 138

Papper version: info:eu-repo/semantics/acceptedVersion

Link to the original source: https://www.sciencedirect.com/science/article/abs/pii/S0032386118300995

Licence document URL: http://repositori.urv.cat/ca/proteccio-de-dades/

Papper original source: Polymer. 138 369-377

APA: Konuray O., Fernández-Francos X., Ramis X., Serra À. (2018). New allyl-functional catalytic comonomers for sequential thiol- Michael and radical thiol-ene reactions. Polymer, 138(), 369-377. DOI: 10.1016/j.polymer.2018.01.073

Article's DOI: 10.1016/j.polymer.2018.01.073

Entity: Universitat Rovira i Virgili

Journal publication year: 2018

First page: 369

Publication Type: Journal Publications