The Research Of Decomposition Behavior Of Engineering Plastics By TGA And TG-FTIR

Thermogravimetric analysis (TGA) is a widely employed technique formeasuring the change in weight of a sample as a function of temperature or time in acontrolled atmosphere. In this paper, the decomposition mechanisms ofpolyetheretherketone (PEEK) and polycarbonate (PC) composite were studied.Fourier transform infrared spectroscopy（FTIR） has been utilized with success in theidentification of gases. The combination of these two techniques permits a completecharacterization of material in terms of thermal stability and decompositionmechanisms. In this paper, combining the two techniques, TG-FTIR, flame-retardantmechanism of PC and Nylon1010（PA1010）compostes were studied.The self-lubricating PEEK composite, which filled with graphite, carbon fiberand polytetrafluoro ethylene (PTFE), is a high performance composite. The thermaldegradation behavior of the PEEK and the PEEK composite was studied using TGA,and the apparent activation energy (Ea) was calculated by using Kissinger and Ozawamethods. Compared with PEEK in the thermal degradation, the self-lubricating PEEKcomposite has higher apparent activation energy.PC has good mechamical properties as an engineering plastic. It is an importantindustrialized products. Flame retardant (POSS) can not improve the flame retardancyto PC. But with the addition of the synergistic flame retardant PPFBS/POSS, PCshows good flame retardancy. The thermal behavior and flame-retardant mechanismof PC/POSS and PC/PPFBS/POSS compostes were studied.PA1010is a spiceal engineering plastic, which is polymerized from castor oil,peculiarly produced in China. PA1010is widely used in mechamical and chemicalindustries. TG FTIR study shows, POSS alone can not promotion of the flameretardancy largely. But it brought forward the initial decomposition temperature of themodified PA1010and postponed the decomposition process.