Aliphatic-aromatic co-polyesters received from poly(ethylene terephthalate) wastes

The results of research into utilisation of poly(ethylene terephthalate) (PET) wastes are presented in this paper PET wastes have been subjected to reaction with esters: of low-molecular aliphatic dicarboxylic acids to receive co-polyesters (KPEs) with properties dependent on the weight ratio of the particular substrates. For selected weight ratios of the raw-materials: used copolymers characterised by the following parameters have been received: glassy temperature ranging from -24 degreesC up to +40 degreesC, melting temperature from 50 degreesC up to 220 degreesC, crystallisation temperature from 80 degreesC up to 160 degreesC and melt flow index of 3-35 g/10 min. The polymers have had different forms: from elastic and plastic masses, through elastic and hard materials to hard and fragile materials.