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J. Sadło, J. Bojarski, G. Strzelczak, J. Michalik

Radiation effects in poly(ethylene terephthalate) - polypropylene composite materials.


Polimery 1999, No 3, 226

DOI: dx.doi.org/10.14314/polimery.1999.226


Radiation-induced radicals in poly(ethylene terephthalate) (PET) and polypropylene (PP) and in their composites were studied by ESR. In pure PET, the radicals were not stabilized at room temperature but, in PET/PP composites (10—20 % of PP), peroxy radicals were recorded at concentrations indicating the radical centers formed originally in PET units to be able to migrate to PP units where they become stabilized. Changes in polymer viscosity observed in the molten state proved degradation to be the major radiation effect.
Keywords: polyethylene terephthalate), polypropylene, irradiation, electron beam, Electron Spin Resonance (ESR)

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