Properties of Polyethylene Terephthalate/Polysulfonyldiphenylene Phenylphosphanate Flame-Retardant Systems

Abstract

Abstract: The molecular-chain-level interactions between polyethylene terephathalate(PET)and polysulfonyldiphenylene phenylphosphanate (PSPPP) have been investigated by FTlR.The existence of the interactl0ns shows the miscibility of PETand PSPPP.PET/PSPPPflame-retardant systems have a very high thermal stabillty, and do not decompose at the processlng temperature of PET.The limlting oxygen index (LOI) values of the systems increase with the content of PSPPP, and are almost not affected by the molecular weights of PSPPPand the blending methods.At the processing temperatures of PET, PSPPPwith lower molecular weights, say M_n＜4000, will cause the degradation of PET, which can be to a certain extent inhibited by adding a stabilizer to the systems.As the results of those, the apparent viscosities of PET/PSPPPsystems with lower molecular weights of PSPPPare higher than those with higher molecular weights of PSPPP.The addition of the stabilizer can decrease their viscosity differences.The apparent viscosities of varlous PET/PSPPPsyStems decrease with the increase of shear rate and the content of PSPPP, and do with the rise of temperature.

Key words: PET, Poly(sulfonyldiphenylene phenylphosphanate), Miscibility, Rheological Property, Flame retardancy

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WANG Yu-Zhong, ZHENG Chang-Yi, WU Da-Cheng. Properties of Polyethylene Terephthalate/Polysulfonyldiphenylene Phenylphosphanate Flame-Retardant Systems[J]. Chem. J. Chinese Universities, 1997, 18(3): 472.

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Properties of Polyethylene Terephthalate/Polysulfonyldiphenylene Phenylphosphanate Flame-Retardant Systems

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