1,2-diketones promoted degradation of poly(epsilon-caprolactone)

Photochemical reactions of Benzil and Camphorquinone were used for modification of poly({epsilon}-caprolactone) polymer films. Photochemistry of dopants was followed by infrared spectroscopy, changes on polymer chains of matrix were followed by gel permeation chromatography. Benzoyl peroxide was eff...

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Main Authors: Danko, Martin, Borska, Katarina, Ragab, Sherif Shaban, Janigova, Ivica, Mosnacek, Jaroslav, Polymer Institute, Slovak Academy of Sciences, Dubravska cesta 9, 845 41 Bratislava, Photochemistry Department, Chemical Industries Research Division, National Research Centre, Dokki, Giza, Egypt.P.O. Box: 12622, Polymer Institute, Center of Excellence GLYCOMED, Slovak Academy of Sciences, Dubravska cesta 9, 845 41 Bratislava
Format: Conference Proceeding
Language:English
Subjects:
ABSORPTION SPECTROSCOPY
BENZOYL PEROXIDE
DECOMPOSITION
DOPED MATERIALS
GEL PERMEATION CHROMATOGRAPHY
GELS
INFRARED SPECTRA
INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY
IRRADIATION
KETONES
MATERIALS SCIENCE
PHOTOCHEMICAL REACTIONS
PHOTOCHEMISTRY
POLYMERS
RADIATION EFFECTS
RECOMBINATION
SOLIDS
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Summary:Photochemical reactions of Benzil and Camphorquinone were used for modification of poly({epsilon}-caprolactone) polymer films. Photochemistry of dopants was followed by infrared spectroscopy, changes on polymer chains of matrix were followed by gel permeation chromatography. Benzoyl peroxide was efficiently photochemically generated from benzyl in solid polymer matrix in the presence of air. Following decomposition of benzoyl peroxide led to degradation of matrix. Photochemical transformation of benzil in vacuum led to hydrogen abstraction from the polymer chains in higher extent, which resulted to chains recombination and formation of gel. Photochemical transformation of camphorquinone to corresponding camphoric peroxide was not observed. Only decrease of molecular weight of polymer matrix doped with camphorquinone was observed during the irradiation.
ISSN:0094-243X
1551-7616
DOI:10.1063/1.4738441