The results of research into utilisation of poly(ethylene terephthalate) (P
ET) wastes are presented in this paper PET wastes have been subjected to re
action with esters: of low-molecular aliphatic dicarboxylic acids to receiv
e co-polyesters (KPEs) with properties dependent on the weight ratio of the
particular substrates. For selected weight ratios of the raw-materials: us
ed copolymers characterised by the following parameters have been received:
glassy temperature ranging from -24 degreesC up to +40 degreesC, melting t
emperature 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, thr
ough elastic and hard materials to hard and fragile materials.