CO-POLYESTERS OF POLYETHYLENE TEREPHTHALATE AND POLYETHYLENE 2,5-FURANDICARBOXYLATE

摘要

Copolymerization of PET has been widely used to improve mechanical and thermal properties of base PET resin. Along with harnessing general advantages of copolymerization like improvement in glass transition temperature, reduction in crystallization rate etc.; there is considerable interest in increasing bio-based components in PET by copolymerization. Upsurge in the field of biomass conversion has made economic production of furanics from non-food feedstocks feasible and opened pathway for a host of polymer systems. 2,5-furandicarboxylic acid (FDCA) has proven to be a major building block especially for polymer applications. In this work, we report synthesis of co-polyesters of PET with 5 to 20 mole % FDCA by conventional melt polymerization technique for condensation polymerization. Structure elucidation and composition of co-polyesters was determined using Infrared Spectroscopy, Thermogravimetric Analysis and Nuclear Magnetic Resonance spectroscopy. Thermal transitions and properties were studied using Differential Scanning Calorimetry. From the study, complete incorporation of FDCA in the chain of polyester was confirmed. Copolyesters of PET with FDCA show improvement in thermal properties and have similar thermal stability as that of PET.