Preparation and Properties of Composites of R-PET and Surface Modified Aramid Fiber

Abstract

Phthalic anhydride was used to corrode the aramid fibers (AFs) in order to improve the interfacial compatibility between AFs and recycled polyethylene terephthalate (R-PET). Besides, the intrinsic viscosity and the mechanical properties of the composites of AFs/R-PET could be improved to realize the transformation from waste products to engineering plastics because phthalic anhydride was also the chain extender of R-PET. FE-SEM, XPS, DSC, TG and MFR were used to study the surface morphology and element contents of AFs and the impact fracture morphology, crystallinity and liquidity of the AFs/R-PET composites. The results show that the surface roughness of AFs and the surface oxygen content are increased with the increase of etching time. Compared with the pure R-PET, AFs/R-PET composites are easier to crystallize and the composites have higher bending strength and impact strength. The maximum intrinsic viscosity of the composites reaches 0.9343dL·g-1 and the mechanical properties achieve optimal values when AFs are corroded for 6h.

Keywords

• phthalic anhydride
• corrosion
• aramid fiber
• PET
• interface
• mechanical property