At present, PET film market in the field of optical film applications are more maintaining the optical performance, has become an important research direction. In this paper, a novel compound antioxidant was prepared and insitu incorporated in the process of polyester synthesis. The chromaticity value of the products is improved while maintaining the optical properties and the effect is more obvious while time passed by.

The above modified and blended composite antioxidant was named P-SLDH and in situincorporated into optical PET materials during the polycondensation process. Light  transmittance-haze test, chroma test, intrinsic viscosity, end carboxyl, UV accelerated aging, DSC,  TG, UV-VIS, UV-VIS, rheometer and universal  tensile testing were conducted to study the optical properties, color, thermal and mechanical properties of the synthesized PET. The results show that PETs synthesized by adding of this optical antioxidant polyester products could achieve the ability to improve the color and antioxidant properties while maintaining optical properties.

Keywords:  Compound antioxidant, hydrolysis resistance, optical properties, chromaticity, polyethylene terephthalate (PET)<span microsoft="" yahei";="" font-size:="" 14px;"="" font-size:14px;"="" style="box-sizing: border-box; padding: 0px; margin: 0px; border: none;">