Lv P, Wang ZZ, Hu Y, Yu MG (2009) Study on effect of polydimethylsiloxane in intumescent flame retardant polypropylene. Journal of Polymer Research 16(2), 81-89. [In English]

Web link: http://dx.doi.org/10.1007/s10965-008-9205-3

Keywords:

Polypropylene; Polydimethylsiloxane; Melamine phosphate; Flame; retardant; Thermal degradation; differential scanning calorimetry; thermal-degradation; melamine; phosphate; polymers; blends; polyurethanes; polysiloxane; polyethylene; performance; composites

Abstract: The effect of polydimethylsiloxane (PDMS) in intumescent flame retarded polypropylene (PP) containing melamine phosphate (MP) was studied using limiting oxygen index (LOI), UL-94 test, thermogravimetric analysis (TG), real time Fourier transform infrared (FTIR) and pyrolysis/gas chromatogram/mass spectrometry (Py-GC/MS). It was found that the addition of PDMS into the PP/MP composites leads to a decrease in the LOI values of the PP/MP/PDMS composites, and the values increase gradually with the increase of the PDMS content. The UL-94 test results indicate that the PP/MP/PDMS composite with 30% PDMS reaches the V-0 rating compared with no rating of the PP/MP composite at the same MP loading. The water resistance of the PP/MP/PDMS composites was investigated, and the improved water leaching of MP was observed. The TG and RTFTIR results illustrate the thermal stability of the PP/MP composites containing PDMS is improved. Moreover, the pyrolysis of the PP/MP/PDMS composites was studied by the Py-GC/MS method.