Abstract
A novel flame retardant (PSiN), containing silicon and nitrogen, was synthesized using N-(β-aminoethyl)-γ-aminopropylmethyldimethoxysilane and diphenylsilanediol through solution polycondensation and it was added to polycarbonate (PC). The structure and thermal properties of PSiN were characterized by fourier transform infrared spectroscopy and thermogravimetric analysis (TG) tests. The effect of PSiN on the flame retardancy and thermal behaviors of PC was investigated by limited oxygen index (LOI), vertical burning test (UL-94), and TG tests. The results showed that the flame retardancy and the thermal stability of PC are improved with the addition of PSiN. When 1 mass% PSiN and 0.5 mass% diphenylsulfone sulfonate (KSS) are incorporated, the LOI value of PC is found to be 46, and class V-0 of UL-94 test is passed. The char structure observed by scanning electron microscopy indicated that the surface of the char for PC/KSS/PSiN system holds a firmer and denser char structure when compared with neat PC and PC/KSS system.
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References
Li XG, Huang MR. Thermal degradation of bisphenol a polycarbonate by high-resolution thermogravimetry. Polym Int. 1999;48:387–91.
Levchik SV, Weil ED. Overview of recent developments in the flame retardancy of polycarbonates. Polym Int. 2005;54:981–8.
Liu S, Ye H, Zhou Y, He J, Jiang Z, Zhao J, Huang X. Study on flame-retardant mechanism of polycarbonate containing sulfonate-silsesquioxane-fluoro retardants by TGA and FTIR. Polym Degrad Stabil. 2006;91:1808–14.
Zhou W, Yang H, Zhou J. The thermal degradation of bisphenol: a polycarbonate containing methylphenyl-silicone additive. J Anal Appl Pyrol. 2007;78:413–8.
Zaikov GE, Lomakin SM. Polymer flame retardancy: a new approach. J Appl Polym Sci. 1998;68:715–25.
Lu SY, Hamerton I. Recent developments in the chemistry of halogen-free flame retardant polymers. Prog Polym Sci. 2002;27:1661–712.
Sen AK, Mukheriee B, Bhattacharya AS, Sanghi LK, De PP, Bhowmick K. Preparation and characterization of low-halogen and nonhalgoen fire-resistant low-smoke (FRLS) cable sheathing compound from blends of functionalized polyolefins and PVC. J Appl Polym Sci. 1991;43:1673–84.
Chiu SH, Wang WK. Dynamic flame retardancy of polypropylene filled with ammonium polyphosphate, pentaerythritol and melamine additives. Polymer. 1998;39:1951–5.
Le Bras M, Bugajny M, Lefebvre J, Bourbigot S. Use of polyurethanes as char-forming agents in polypropylene intumescent formulations. Polym Int. 2000;49:1115–24.
Innes J, et al. Flame retardants for polycarbonate—new and classical solutions. Plast Addit Compd. 2006;8:26–9.
Ishli K, Shimomai K. Flame-retardent polycarbonate resin composition and a molded product. US Patent. 2002; 6342550.
Blackburn KJ, Gallucci RR, Georgiev EM. Flame retardant polycarbonate resin/ABS graft copolymer blends. US Patent. 2003; 6605659.
Chen XL, Hu Y, Song L. Thermal behaviors of a novel UV cured flame retardant coatings containing phosphorus, nitrogen and silicon. Polym Eng Sci. 2008;48:116–23.
Zhong HF, Wei P, Jiang PK. Synthesis and characteristics of a novel silicon-containing flame retardant and its application in poly[2,2-propane-(bisphenol)carbonate]/acrylonitrile butadiene styrene. J Polym Sci B. 2007;45:1542–51.
Masatoshi I, Shin S. Silicone derivatives as new flame retardants for aromatic thermoplastics used in electronic devices. Polym Adv Technol. 1998;9:593–600.
Zhong HF, Wei P, Jiang PK. Thermal degradation behaviors and flame retardancy of PC/ABS with novel silicon-containing flame retardant. Fire Mater. 2007;31:411–23.
Liu SM, Lang XM, Ye H. Preparation and characterization of copolymerized aminopropyl/phenylsilsesquioxane microparticles. Eur Polym J. 2005;41:996–1001.
Nishihara H, Suda Y, Sakuma T. Halogen- and phosphorus-free flame retardant PC plastic with excellent moldability and recyclability. J Fire Sci. 2003;21:451–64.
He QL, Song L, Hu Y, Zhou S. Synergistic effects of polyhedral oligomeric silsesquioxane (POSS) and oligomeric bisphenyl A bis(diphenyl phosphate) (BDP) on thermal and flame retardant properties of polycarbonate. J Mater Sci. 2009;5:1308–16.
Song L, He QL, Hu Y, Chen H, Liu L. Study on thermal degradation and combustion behaviors of PC/POSS hybrids. Polym Degrad Stabil. 2008;93:627–39.
Periadurai T, Vijayakumarb CT, Balasubramanian M. Thermal decomposition and flame retardant behaviour of SiO2-phenolic nanocomposite. J Anal Appl Pyrol. 2010;89:244–9.
Ozawa T. A new method of analyzing thermogravimetric data. Bull Chem Soc Jpn. 1965;38:1881–6.
Polli H, Pontes LAM, Souza MJB, Araujo AS. Thermal analysis kinetics applied to flame retardant polycarbonate. J Therm Anal Calorim. 2006;86:469–73.
Perret Birgit, Kristin H, Pawlowski, Bernhard Schartel. Fire retardancy mechanisms of arylphosphates in polycarbonate (PC) and PC/acrylonitrile-butadiene-styrene. J Therm Anal Calorim. 2009;97:949–58.
Takashi K, John RS, Richard HH. Flame-retardant mechanism of silica: effects of resin molecular weight. J Appl Polym Sci. 2003;87:1541–53.
Grassie N, Francey KF, Macfarlane IG. The thermal degradation of polysiloxanes-part 4: poly(dimethyl/diphenyl siloxane). Polym Degrad Stab. 1980;2:67–83.
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Yuan, D., Yin, H. & Cai, X. Effect of a novel flame retardant containing silicon and nitrogen on the thermal stability and flame retardancy of polycarbonate. J Therm Anal Calorim 111, 1531–1537 (2013). https://doi.org/10.1007/s10973-012-2488-y
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DOI: https://doi.org/10.1007/s10973-012-2488-y