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Sustainable terpene triblock copolymers with tuneable properties for pressure sensitive adhesive applications

Elsmore, M.T.; Atkinson, R.L.; Irvine, D.J.; Howdle, S.M.; De Focatiis, D.S.A.

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Authors

M.T. Elsmore

R.L. Atkinson

DEREK IRVINE derek.irvine@nottingham.ac.uk
Professor of Materials Chemistry



Abstract

A series of triblock copolymers in a hard-soft-hard block configuration with varying hard block α-pinene methacrylate content and molecular weight and butyl acrylate soft segment have been synthesised and investigated for viability in pressure sensitive adhesive (PSA) applications. The morphologies vary from pockets of hard phase distributed within a continuous soft matrix, through to lamellar with co-continuous phases, and finally continuous hard phase with pockets of soft phase dispersed. Uniaxial tensile properties, probe adhesion performance and cyclic adhesive behaviour are presented for seven compositions including four short chain and three long chain copolymers, alongside a commercial benchmark PSA. Structure-property relationships for the novel elastomers are evaluated, establishing that short chain materials with 20-25 wt% αPMA offer similar tensile and adhesion performance to the commercial elastomer. Raising the hard phase concentration has been observed to provide a considerable increase in ultimate tensile strength, stiffness and peak tack force, but at the expense of significant reductions in ultimate tensile strain, adhesive bond displacement and vibrational dissipation. The results suggest that the performance of these sustainable materials can be tuned to produce viable PSAs with a range of useful properties.

Journal Article Type Article
Acceptance Date Mar 2, 2022
Online Publication Date Mar 10, 2022
Publication Date 2022-05
Deposit Date Mar 3, 2022
Publicly Available Date Mar 11, 2023
Journal Polymer Testing
Print ISSN 0142-9418
Publisher Elsevier BV
Peer Reviewed Peer Reviewed
Volume 109
Article Number 107530
DOI https://doi.org/10.1016/j.polymertesting.2022.107530
Keywords Polymers and Plastics; Organic Chemistry
Public URL https://nottingham-repository.worktribe.com/output/7534455
Publisher URL https://www.sciencedirect.com/science/article/pii/S0142941822000563

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