TY - JOUR
T1 - A new strategy to improve the toughness of epoxy thermosets by introducing the thermoplastic epoxy
AU - Chen, Duo
AU - Li, Juanzi
AU - Yuan, Yuhuan
AU - Gao, Chang
AU - Cui, Yunguang
AU - Li, Shichao
AU - Wang, Hongyu
AU - Peng, Cong
AU - Liu, Xin
AU - Wu, Zhanjun
AU - Ye, Jinrui
N1 - Publisher Copyright:
© 2022 Elsevier Ltd
PY - 2022/2/1
Y1 - 2022/2/1
N2 - A novel thermoplastic epoxy (TPE) was constructed through the solution polymerization process between diglycidyl ether of bisphenol A (DGEBA) and aniline to improve the performance of epoxy thermosets. Its cure kinetics, molecular structure, thermal and mechanical properties were investigated. Due to the similar chemical structure, the TPE exhibits excellent compatibility with DGEBA and DGEBA-based thermosets. The results of the mechanical properties of cured TPE/DGEBA composites demonstrate that the appropriate content of TPE (15 phr) can significantly improve the mechanical properties including the tensile strength, tensile fracture strain, flexural strength, flexural fracture detection and fracture toughness, which is associated with the formation of semi-IPN structure of TPE and DGEBA-based thermosets. The corresponding mechanism for enhanced properties of TPE/epoxy composites was investigated deeply by scanning electron microscope. And, the tensile and flexure modulus, glass transition temperature and thermal stability of TPE modified DGEBA based thermosets demonstrates a slightly decrease tendency with the addition of TPE, which can be attribute to the coupling effect between the uncrosslinked chain structure of TPE and the strong interaction of hydroxyl between TPE and DGEBA thermosets.
AB - A novel thermoplastic epoxy (TPE) was constructed through the solution polymerization process between diglycidyl ether of bisphenol A (DGEBA) and aniline to improve the performance of epoxy thermosets. Its cure kinetics, molecular structure, thermal and mechanical properties were investigated. Due to the similar chemical structure, the TPE exhibits excellent compatibility with DGEBA and DGEBA-based thermosets. The results of the mechanical properties of cured TPE/DGEBA composites demonstrate that the appropriate content of TPE (15 phr) can significantly improve the mechanical properties including the tensile strength, tensile fracture strain, flexural strength, flexural fracture detection and fracture toughness, which is associated with the formation of semi-IPN structure of TPE and DGEBA-based thermosets. The corresponding mechanism for enhanced properties of TPE/epoxy composites was investigated deeply by scanning electron microscope. And, the tensile and flexure modulus, glass transition temperature and thermal stability of TPE modified DGEBA based thermosets demonstrates a slightly decrease tendency with the addition of TPE, which can be attribute to the coupling effect between the uncrosslinked chain structure of TPE and the strong interaction of hydroxyl between TPE and DGEBA thermosets.
KW - Epoxy thermoset
KW - Mechanical properties
KW - Thermoplastic epoxy
UR - http://www.scopus.com/inward/record.url?scp=85122422128&partnerID=8YFLogxK
U2 - 10.1016/j.polymer.2022.124518
DO - 10.1016/j.polymer.2022.124518
M3 - Article
AN - SCOPUS:85122422128
SN - 0032-3861
VL - 240
JO - Polymer
JF - Polymer
M1 - 124518
ER -