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Synergistic effect of organic silicon on the flame retardancy and thermal properties of polycarbonate/potassium‐4‐(phenylsulfonyl) benzenesulfonate systems
Author(s) -
Yuan Dandan,
Deng Liantian,
Yin Haiqing,
Cai Xufu
Publication year - 2012
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.37888
Subject(s) - limiting oxygen index , thermogravimetric analysis , polycarbonate , char , fire retardant , thermal stability , materials science , polymer chemistry , chemical engineering , nuclear chemistry , composite material , chemistry , pyrolysis , engineering
Melt blending was used to prepare a series of flame‐retardant hybrids based on bisphenol A, polycarbonate (PC), potassium‐4‐(phenylsulfonyl)benzenesulfonate (KSS), and the organic silicon compounds N ‐(β‐aminoethyl)‐γ‐aminopropylmethyldimethoxysilane (KH‐602) and diphenylsilanediol. The flame retardancy and thermal stability of the hybrids were investigated by the limiting oxygen index (LOI) test, the UL‐94 vertical burning test, and thermogravimetric analysis. The results show that the flame retardancy of the PC/KSS system and the weight of the residues improved with the addition of the organic silicon. When the content of diphenylsilanediol was 4 wt % and KH‐602 was 1 wt %, the LOI value of the PC/KSS system was found to be 47, and Class V‐0 of the UL‐94 test was achieved. The microstructures observed by scanning electron microscopy indicated that the surface of the char for PC/KSS systems with KH‐602 and diphenylsilanediol hold a more cohesive and denser char structure when compared with the pure PC/KSS system. © 2012 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013