Study of Reinforcement Effects of Carbon Nanotubes on Phosphorus-Containing Flame-Retardant Pet and Its Mechanism
|School||Beijing Institute of Clothing Technology|
|Keywords||Multi-walled carbon nanotubes / PET composite Mechanical Properties Flame retardant properties Rheological properties Thermal performance|
In this paper, the mixed acid oxidation treatment of multi -walled carbon nanotubes (o-MWCNTs) were used as nano- filled material , in situ polymerization and melt blending prepared multi-walled carbon nanotubes / poly (ethylene terephthalate) ( of MWCNTs / PET) composite and multi- wall carbon nanotube / flame retardant the PET (MWCNTs / FRPET) complexes . Fourier transform infrared spectroscopy (IR), scanning electron microscopy ( SEM ) , thermal gravimetric analysis analyzer ( TGA ) , differential scanning calorimetry instrument ( DSC ) , the limit oxygen index (LOI), cone calorimeter (CONE ) , rotational rheometer , Instron universal tensile machine , and dynamic mechanical testing (DMA) to study the dispersion of carbon nanotubes in composites morphology and crystalline properties of the composite , thermal properties , combustion properties , rheological properties , mechanical properties. Infrared spectroscopy and thermal gravimetric analysis showed that the MWCNTs treated by mixed acid in its produce a certain number of carboxyl functional groups (- COOH ) ; tensile test and DMA tests show that the rigid polymer enhanced add MWCNTs ; DSC the test results indicate that MWCNTs obvious heterogeneous nucleation , the composite thermal crystallization temperature (Tmc) to move to the high temperature , cold crystallization temperature (Tcc) to move to the low-temperature ; TGA test showed that of MWCNTs added to improve the composite materials of the same the residual amount of temperature ; for the composite material prepared by melt blending , when MWCNTs added amount of up to 2.0% , the conductive properties of the composite material are significantly enhanced ; rotational rheometer test shows a composite material prepared for situ method cone calorimeter test , when MWCNTs dosage of 0.2% , compared with the matrix , the rheological properties have obvious different composites prepared by melt blending the critical value of 2% ; showed that the heat release rate of the composite material is significantly reduced, with MWCNTs added MWCNTs added to further improve the flame retardant properties of the material .