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Flame retardant and thermal decomposition mechanism of poly(butylene terephthalate)/DOPO‐HQ composites
Author(s) -
He Min,
Zhang Daohai,
Zhao Wan,
Qin Shuhao,
Yu Jie
Publication year - 2019
Publication title -
polymer composites
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.577
H-Index - 82
eISSN - 1548-0569
pISSN - 0272-8397
DOI - 10.1002/pc.24772
Subject(s) - materials science , fire retardant , thermogravimetric analysis , limiting oxygen index , composite material , thermal decomposition , cone calorimeter , combustion , chemical engineering , char , organic chemistry , chemistry , engineering
Poly(butylene terephthalate) (PBT)/10‐(2,5‐dihydroxyphenyl)‐10H‐9‐oxa‐10‐phosphaphenanthrene‐10‐oxide(DOPO‐HQ) composites with poly(ethylene– butylacrylate–glycidylmethacrylate) (PTW) as a compatibilizer were prepared by the twin‐screw extruder. The flame retardant and thermal decomposition mechanism of the PBT/DOPO‐HQ flame retardant composites was investigated. The limiting oxygen index (LOI), vertical burning test (UL94), cone calorimetric test, thermogravimetric analysis, laser micro‐Raman spectrometer (LRS), thermogravimetric analysis‐Fourier transform infrared spectrometer, and TG‐differential scanning calorimetry of the PBT/DOPO‐HQ flame retardant composites were carried out. The LOI results showed that the LOI value PBT/DOPO‐HQ flame retardant composites with PTW compatibilizer is higher than PBT/DOPO‐HQ flame retardant composites without PTW compatibilizer. The PBT/PTW/DOPO‐HQ (20%) flame retardant composites achieved UL‐94 V‐0 classification, but only addition of 20% DOO‐HQ to PBT just achieved vertical burning test (UL94) V‐2 classification with serious flammable dripping. What's more, the mechanical properties of PBT/DOPO‐HQ flame retardant composites were studied. POLYM. COMPOS., 40:974–985, 2019. © 2018 Society of Plastics Engineers