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Study of Structural and Morphological Changes during Accelerated Oxidative Degradation of Mixtures of Polyoxybutyrate with Polycaprolactone

Inorganic Materials: Applied Research, ISSN: 2075-115X, Vol: 13, Issue: 3, Page: 872-878
2022
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Abstract: Structural and morphological changes in the film samples of poly(oxybutyrate-co-oxyvalerate) (P(OB-OV)) and poly-ε-caprolactone (PCL) during accelerated oxidative degradation in the Fenton reagent are studied by IR spectroscopy, DSC, and scanning electron microscopy. It is shown that phase separation of the P(OB-OV) and PCL components is observed in the initial mixture. The melting of different phases of P(OB-OV) is observed at 147 and 157°C, and PCL melts at 61°C. The degrees of crystallinity of P(OB-OV) and PCL in the mixture are 67 and 50%, respectively. It is found that the degradation of P(OB-OV) predominates during the incubation of the samples of the composite in the Fenton solution for 2 to 12 weeks. It is possible to substantially change the rate of oxidative degradation and the molecular weight and degree of crystallinity of a P(OB-OV):PCL polymer composite material by varying the ratio of the components.

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