TY - JOUR
T1 - Preparation and mechanism of toughening and flame retardance of epoxy resin using novel silsesquioxane molecules
AU - Zhang, Wenyuan
AU - Huang, Jianfeng
AU - Guo, Xiaoyan
AU - Zhang, Wenchao
AU - Qin, Zhaolu
AU - Yang, Rongjie
N1 - Publisher Copyright:
© 2023 Elsevier B.V.
PY - 2023/9
Y1 - 2023/9
N2 - To simultaneously improve epoxy resin's toughness and flame retardancy, novel polyhedral oligomeric silsesquioxane with two functional epoxy and methacryloxy groups (EM-POSSs) were synthesized. Various analytical methods showed that caged POSS compounds with T8, T10, and T12 structures were successfully synthesized. The epoxy groups improved the dispersibility of POSS in the epoxy resin matrix and participated in the curing reaction to enhance the mechanical properties and thermal stability. Furthermore, the methacryloyloxy groups polymerized at high temperatures to form longer and more flexible chain groups, thereby improving the toughness of the epoxy networks. It was found that EM-POSSs significantly improved epoxy the resin's toughness and flame retardancy. Compared with pure epoxy resin, the peak heat release rate (PHRR) of epoxy composites was reduced by 45%, while the bending strength, tensile strength, and impact toughness increased by 55%, 50%, and 57.1%, respectively.
AB - To simultaneously improve epoxy resin's toughness and flame retardancy, novel polyhedral oligomeric silsesquioxane with two functional epoxy and methacryloxy groups (EM-POSSs) were synthesized. Various analytical methods showed that caged POSS compounds with T8, T10, and T12 structures were successfully synthesized. The epoxy groups improved the dispersibility of POSS in the epoxy resin matrix and participated in the curing reaction to enhance the mechanical properties and thermal stability. Furthermore, the methacryloyloxy groups polymerized at high temperatures to form longer and more flexible chain groups, thereby improving the toughness of the epoxy networks. It was found that EM-POSSs significantly improved epoxy the resin's toughness and flame retardancy. Compared with pure epoxy resin, the peak heat release rate (PHRR) of epoxy composites was reduced by 45%, while the bending strength, tensile strength, and impact toughness increased by 55%, 50%, and 57.1%, respectively.
KW - Fire safety
KW - Fracture toughness
KW - Impact behavior
KW - Particle-reinforced composites
UR - http://www.scopus.com/inward/record.url?scp=85162201344&partnerID=8YFLogxK
U2 - 10.1016/j.reactfunctpolym.2023.105645
DO - 10.1016/j.reactfunctpolym.2023.105645
M3 - Article
AN - SCOPUS:85162201344
SN - 1381-5148
VL - 190
JO - Reactive and Functional Polymers
JF - Reactive and Functional Polymers
M1 - 105645
ER -