SYNTHESIS AND STRUCTURE OF ELASTOMERIC POLY[ESTER-BLOCK-ETHER]S

Different poly[ester-block-ether] (PEE) elastomers have been prepared in a two-stage process, namely transesterification followed by polycon densation in the melt. These terpolymers consisted of poly(butylene te rephthalate) (PET), poly(oxytetramethylene) (PTMO) and dimerized fatty acid (DFA). The content of PTMO and DFA blocks was changed at a const ant PBT mass ratio of 50. Supermolecular structure of synthesized poly mers was investigated using optical microscopy (OM) and transmission e lectron microscopy (TEM). Thermal and mechanical properties were exami ned by differential scanning calorimetry (DSC) and dynamic mechanical analysis (DMTA). An influence of dimerized fatty acid on the segment's comiscibility (pbase separation) was estimated.