Fire retardant and charring effect of cyclic phenolphthalein (phenylene phosphonate) oligomer on polybutylene terephthalate
作者： Nana Li , Guowei Jiang , Guangyuan Zhou
DOI: 10.1039/C5RA18829F
关键词:
摘要: A novel solid flame retardant cyclic phenolphthalein (phenylene phosphonate) (CPPA) oligomer was synthesized in high yields through the reaction of phenylphosphonic dichloride with under pseudo-high dilution conditions via polycondensation. Detailed structural characterizations this were conducted using matrix-assisted laser desorption/ionization time-of-flight mass spectrometry, 1H NMR, 31P and FTIR. Furthermore, flame-retardant efficiency polybutylene terephthalate (PBT) investigated limiting oxygen index (LOI), UL-94 tests Microscale combustion colorimetry (MCC). After adding 20 wt% CPPA, LOI increased from 20.2% to 26.2% V-0 rating achieved. The PHRR THR values PBT/CPPA25% decreased. Thermogravimetric analysis, FTIR, pyrolysis/GC/MS employed elucidate pyrolysis behavior CPPA PBT/CPPA. residual morphologies residue system scanning electron microscopy. Results showed that could change degradation path PBT improved char formation PBT/CPPA system.
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