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A triple‐shape memory material fabricated by in situ crosslinking of poly(butylene adipate‐ co ‐terephthalate)/ε‐polycaprolactone via electron‐beam irradiation and its triple‐shape memory effects
Author(s) -
Wu Xianyou,
Qian Jing,
fu Chao,
Tan Zhongyang,
Gao Yixing,
Ma Antong,
Nie Wei,
Ran Xianghai
Publication year - 2020
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.48588
Subject(s) - materials science , polycaprolactone , irradiation , adipate , composite material , thermal stability , relaxation (psychology) , ultimate tensile strength , polymer chemistry , chemical engineering , polymer , psychology , social psychology , physics , nuclear physics , engineering
In this work, we fabricated a triple‐shape memory polymeric material though in situ crosslinking of poly(butylene adipate‐ co ‐terephthalate)/ε‐polycaprolactone blends induced by electron beam irradiation. The intrinsic property of irradiation crosslinking, crosslinking rule in this heterogeneous system, formation of interfacial bridge molecular, and the resulted interfacial strength were investigated. No obvious interfacial slips were observed in tensile test, and the elongation at break was above 900%. The high‐temperature relaxation and recovery experiments at nonlinear region confirmed the excellent hyperelasticity and recovery ratios ( R r ) can be as high as 95% for samples irradiated above 96 kGy. The mismatch between heating rate and relaxation kinetics resulted in both instable temporary shapes and heating‐mode dependent recovery behavior during the recovery process. Self‐stability of the temporary shape at middle temperature was also emphasized in view of the phenomenon that the second R r was above 100% in our experiments. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2020 , 137 , 48588.