Diels–Alder crosslinked telechelic poly(caprolactone-thiourethane)s with self-healing of macro-damages

Huan Hoang Dang, Thuy Thu Truong, Anh Duc Song Nguyen, Ly Mai Thi Nguyen, Ha Tran Nguyen, Thiet Quoc Nguyen, Tien Minh Huynh, Ngan Nguyen Le, Tin Chanh Duc Doan, Chien Mau Dang, Le Hoang Sinh, Luong Nguyen Dang, Jukka Seppälä, Le Thu T. Nguyen*

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

1 Citation (Scopus)

Abstract

Healable polymers with damage healability under external stimuli are attractive materials in many industrial applications. It is also highly desirable to produce materials capable of healing at moderate conditions without sacrificing the mechanical properties when incorporating reversible interactions in a facile and practical way. A straightforward approach is proposed to manufacture networks containing dynamic Diels–Alder and thiourethane bonds and shape recovery ability. Such materials were capable of mild-temperature-triggered healing of scratches, complete cuts and deformation damages. The materials were prepared via chain-end crosslinking of maleimide-telechelic poly(caprolactone-thiourethane) precursors that contain multiple rigid bismaleimide segments. Monitoring the chain length of the precursors led to changes in the network mechanical and healing performance; the best obtained material showed high tensile strength (~ 36 MPa) and Young’s modulus (~ 330 MPa) and good healing efficiency at mild temperature (complete healing of scratches and cuts and tensile strength recovery of 87% at 70 °C).

Original languageEnglish
Pages (from-to)15651–15661
JournalJournal of Materials Science
Volume57
Issue number32
Early online date17 Aug 2022
DOIs
Publication statusPublished - Aug 2022
MoE publication typeA1 Journal article-refereed

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