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

• Published in: Inorganic materials : applied research Vol. 13; no. 3; pp. 872 - 878
• Main Authors: Vasilets, V. N., Pankina, A. P., Nemets, E. A., Belov, V. Yu, Sevastianov, V. I.
• Format: Journal Article
• Language: English
• Published: Moscow Pleiades Publishing 01.06.2022; Springer Nature B.V
• Subjects: Chemistry; Chemistry and Materials Science; Composite materials; Crystal structure; Crystallinity; Degradation; Degree of crystallinity; Industrial Chemistry/Chemical Engineering; Infrared spectroscopy; Inorganic Chemistry; Materials Science; Mixtures; Morphology; New Methods of Treatment and Production of Materials with Required Properties; Oxidation; Phase separation; Polycaprolactone; Polymer matrix composites; Reagents; scanning electron microscopy; differential scanning calorimetry; oxidative degradation; poly(oxybutyrate-co-oxyvalerate); poly ε-caprolactone; Fenton reagent; FTIR spectroscopy
• ISSN: 2075-1133; 2075-115X
• DOI: 10.1134/S2075113322030364

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.