Synthesis And Properties Of Antistatic Copolyester And Its Nanocomposites

In this study, antistatic modified co-polyester （MCPET） and corresponding nanocomposites containing nanoparticles were synthesized via in-situ polymerization. The antistatic nanocomposites fiber was obtained by means of melt spinning and followed drawing process. The dispersion states of nanoparticles in dispersion solution and MCPET were studied. The investigation focused on the effect of nanoparticles on the thermal property, mechanical property, crystallization and orientation behavior as well as the antistatic property of MCPET.The results of scanning electronic microscopy（SEM） suggest that the pre-surface modification of nanoparticles is favor to get satisfactory dispersion states in MCPET matrix. The addition of nanoparticles into MCPET leads to the increase of intrinsic viscosity at the low content （0.5～1wt%）, and then the decrease with further increasing the content of nanoparticles （2wt%）.Differential scanning calorimetry （DSC） results indicated that the melting point （Tm） of MCPET showed no obvious change with the addition of nanoparticles. However, the melt crystallization temperature （Tmc） and the glass transition temperature （Tg） were moderately increased. In addition, the addition of nanoparticles has little influence on the thermal stability of MCPET demonstrated by the thermo gravimetric analysis （TGA）. According to the results of DSC and wide angle X-ray diffraction （WAXD）, the crystallization ability of MCPET is enhanced due to heterogeneous nucleating effect of nanoparticles.The MCPET/nanoparticles fibers showed good antistatic performance when the nanonanoparticle content was 1 wt %. The specific resistance of fibers is about 2.1×10⁸ （?）·g/cm², which is much lower than that of the neat PET fibers (about 1.012×10¹³ï¼ˆ?）·g/cm²), suggesting that the hybrid fibers show a better anti-static performance.