3 years ago

Nonhalogen flame retarded poly(butylene terephthalate) composite using aluminum phosphinate and phosphorus-containing deoxybenzoin polymer

Nonhalogen flame retarded poly(butylene terephthalate) composite using aluminum phosphinate and phosphorus-containing deoxybenzoin polymer
Jing Zhu, Junrong Yu, Yan Wang, Zuming Hu, Xilong Hu
Synergistic charring effect was observed between aluminum diethlyphosphinate (AlPi) and 4,4-bishydroxydeoxybenzoin-polyphosphonate (BHDB-PPN) in the poly(butylene terephthalate) composite. By combining them together, robust UL 94 V0 rating was achieved at 0.8 mm thickness for poly(butylene terephthalate)/AlPi/BHDB-PPN composite which exhibited better mechanical properties than the samples without BHDB-PPN. The thermal degradation behavior of BHDB-PPN was investigated by analyzing its evolution and residues under different temperatures. It was found that the radical termination reaction of formed benzyl group may play a critical role in the high charring capacity of BHDB-PPN. Part of the volatile diethlyphosphinate fragments reacted with the degradation intermediates from BHDB-PPN to form big chain structure for further carbonization was a possible reason for the synergistic charring effect between AlPi and BHDB-PPN. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017, 134, 45537.

Publisher URL: http://onlinelibrary.wiley.com/resolve/doi

DOI: 10.1002/app.45537

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