Bowen Lv, Dongqing Liu† , Tian Xu, Yuxuan Cheng, Sun Zhou, Mengyuan Zhang, and Qinxing Xie
State Key Laboratory of Hollow Fiber Membrane Materials and Processes, Key Laboratory of Materials for Energy Storage, School of Material Science and Engineering, Tiangong University, Tianjin 300387, China
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Two polymeric additives, polyhexamethyl guanidine-diphenyl hypophosphite (DPPA-PHMG) and polyhexamethyl guanidine-chlorobridging acid (HA-PHMG), were prepared to overcome aqueous solubility of polyhexamethyl guanidine (PHMG) through salinization with two acidic flame retardant intermediates, diphenyl hypophosphite and chlorobridging acid. Melting points of two water-insoluble organic salts were 176.49 ℃ and 172.20 ℃ tested by TG, which were both higher than PHMG’s and brought better thermostability for the starting polymer. Their polypropylene (PP) blend films achieved 99.9% bactericidal rate for Escherichia coli and their suitable content improved flame-retardant performance in combustion experiments. PHMG serves as a useful platform for development of multifunctional additives.
Keywords: di-functional additives, bacteria inhibitor, flame retardant, polyhexamethyl guanidine salt.
2025; 49(4): 411-416
Published online Jul 25, 2025
State Key Laboratory of Hollow Fiber Membrane Materials and Processes, Key Laboratory of Materials for Energy Storage, School of Material Science and Engineering, Tiangong University, Tianjin 300387, China