Abstract: A series of bio-base plasticizers with different molecular structures were prepared by the reaction of 2,5-furan-dicarboxylic acid with trans-2-hexenol and n-hexanol. The effects of the molecular structure and amount of plasticizers on the mechanical and rheological properties of PVC compounds were investigated by means of impact test, tensile test, dynamic mechanical analysis and capillary rheometer. The results indicated that the impact strength of PVC compounds were improved with the addition of two new bio-base plasticizers, and 2,5-dihexyl furan-dicarboxylate exhibited a better plasticizing effect on PVC than 2,5-di-(trans-2-hexene furan-dicarboxylate)ester. When 10 phr of 2,5-dihexyl furan-dicarboxylate was added, the PVC compound obtained an increase in impact strength by 0.28 kJ/m2 but a decrease in tensile strength by 4.2 MPa compared to the compound containing the same content of dioctyl phthalate.

Key words: polyvinyl chloride, bio-base plasticizer, 2,5-furan dicarboxylic acid, dynamic mechani-cal property