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Manipulating bond exchange rates in vitrimer‐ hexagonal boron nitride nanohybrids via heat capacity enhancement
Author(s) -
Goh Munju,
Shin Haeun,
Kim Chae Bin
Publication year - 2021
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.50079
Subject(s) - thermosetting polymer , covalent bond , materials science , boron nitride , kinetics , hexagonal boron nitride , composite material , thermoplastic , activation energy , chemical engineering , polymer chemistry , nanotechnology , chemistry , organic chemistry , graphene , engineering , physics , quantum mechanics
Both thermoplastic and thermoset like vitrimers with dynamic covalent networks have been considered to be strong candidates as matrix materials for incorporating fillers to produce strong but also weldable, recyclable, and functional composites with light weight. As the bond exchange kinetics of dynamic covalent networks are a key factor governing macroscopic properties of vitrimers, substantial efforts have been devoted to manipulating the kinetics by synthesizing vitrimers equipped with new bond exchange chemistries. Here, a facile and synthesis‐free approach to increasing the bond exchange rates of a model vitrimer, poly(hexahydrotriazine), is described. It was accomplished by simply incorporating a hexagonal boron nitride ( h BN) filler. The incorporated h BN effectively accelerated the thermally activated bond exchange reactions as evidenced by reduction in both activation energy and relaxation time.