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Preparation of polystyrene/triphenyl phosphate composites by suspension polymerization and melt extrusion method — A comparative study

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Abstract

Polystyrene (PS)/triphenyl phosphate (TPP) composites were prepared by both suspension polymerization and melt extrusion, and a comparative study of the flame retardance and mechanical properties was carried out. The results showed that suspension polymerization was a better technique than melt extrusion for obtaining good dispersity of the PS/TPP composite. The TPP nanoparticles, which were approximately 50 nm in size, were homogenously and uniformly dispersed in the PS matrix by suspension polymerization in one-step. However, the PS/TPP composite was partially agglomerated, exhibiting irregularly shaped micron-scale particles as a result of melt extrusion. In contrast to the melt extrusion, the limited oxygen index (LOI) of the PS/TPP nanocomposite by suspension polymerization increased to 22.6% from 21.8%, and time to ignition (TTI) increased by 12.3%, the peak heat release rate (PHRR) decreased by 8.5%, and the total heat release (THR) decreased by 11.0%. The mechanical properties of the PS/TPP nanocomposite by suspension polymerization also increased. The tensile strength, elongation at break, and flexural strength increased by 36.4%, 8.5%, and 108%, respectively.

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Correspondence to Xiang-mei Li  (李向梅).

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Zhang, Cw., Yang, Rj., Li, Xm. et al. Preparation of polystyrene/triphenyl phosphate composites by suspension polymerization and melt extrusion method — A comparative study. Chin J Polym Sci 34, 688–696 (2016). https://doi.org/10.1007/s10118-016-1791-7

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  • DOI: https://doi.org/10.1007/s10118-016-1791-7

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