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Photochemical transformation in poly(acrylic acid)/poly(ethylene oxide) complexes

Paper ID Volume ID Publish Year Pages File Format Full-Text
28610 44082 2006 8 PDF Available
Title
Photochemical transformation in poly(acrylic acid)/poly(ethylene oxide) complexes
Abstract

The poly(acrylic acid)/poly(ethylene oxide) (PAA/PEO) complexes with different stoichiometric ratio were obtained from aqueous solutions. The chemical structure of these blends in solid state and the interactions between components has been studied using mainly FT-IR spectroscopy. The miscibility of components was proved also by differential scanning calorimetry (DSC). The films of both pure polymers and their blends at different compositions were UV-irradiated (λ = 254 nm) in air atmosphere. The course of photochemical transformations has been monitored by absorption spectroscopy (FT-IR, UV–vis), DSC, X-ray diffraction and thermogravimetry, which was also applied for estimation of the thermal properties of samples studied.It was found that photooxidative degradation is less efficient in PAA/PEO complexes than that in PAA and PEO exposed separately. The most photostable was PAA/PEO (50/50) blend. PAA disturbs crystallization PEO in the blends but changes in crystallinity degree of PEO/PAA during UV-radiation were negligible.Thermal stability of PAA/PEO complexes is lower comparing to pure components but UV-irradiation does not cause significant changes in thermal resistance of blends studied.

Keywords
Poly(acrylic acid); PAA; poly(ethylene oxide); PEO; Polymer blends; photooxidative degradation
First Page Preview
Photochemical transformation in poly(acrylic acid)/poly(ethylene oxide) complexes
Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 180, Issues 1–2, 15 May 2006, Pages 46–53
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering