Chemical modification of terephthalate polyesters by reaction with bis(hydroxyethyl ether) of bisphenol A.

none5Copolyesters of terephthalic acid with bis(hydroxyethyl ether) of bisphenol A (BHEEB) in different molar ratios were synthesized by reactive blending from terephthalate polyesters and by melt polycondensation from the monomers. By this way, bisphenol A groups were inserted in the polyester chains with the aim to obtain polyesters with improved mech. properties. The insertion of the BHEEB into the polyester backbone is quant. and does not give rise to side reactions. These copolyesters can be obtained by the chem. recycling of com. polymers; indeed BHEEB can be synthesized by chem. recycling of bisphenol A polycarbonate and may be incorporated in the polyester by reactive blending with recycled terephthalate polyesters. A new method for BHEEB synthesis by chem. recycling of PC is also presented.noneC. Berti; M. Colonna; M. Fiorini; C. Lorenzetti; P. MarcheseC. Berti; M. Colonna; M. Fiorini; C. Lorenzetti; P. Marches