Self-Cross-Linking Characterization of Poly(fumaric-co-itaconic-co-butanediol)

Abstract

INTRODUCTION Unsaturated aliphatic polyesters condensed with unsaturated acid, e.g. maleic acid or fumaric acid, a dihydric alcohol were used in our daily life 1,2 and researched on their synthesis and physicochemical properties over past few decades 3,4. The additive property of C=C in the unsaturated aliphatic polyesters has received considerable attention, because it would expand the possible application, for example, biomedical area, agricultural area, biodegradable plastics, toner and polyurethane 5,6. The addition reaction of the C=C in unsaturated polyesters with a vinyl monomer as the cross-linking agent in the presence of a peroxide catalyst has been investigated. It was known that the linear polyesters chain could be cross-linked to network under certain conditions and then the properties of the polyesters were changed 7-12. Aoyagi et al. 13-15 prepared cross-linked poly(ε-caprolactoneco-D,L-lactide) materials derived from 4-armed corresponding macromonomer and found that the drug permeation could be controlled by temperature change. The softening point and the mechanical properties of the cross-linked polyesters could be achieved by suitable mixing of the 2-branched poly(ε-caprolactone-coD ,L-lactide) macromonomer and the 4-branched ones. It is showed that the degradation rate of the cured polymer was reduced with an increased degree of cross-linking. The biodegradability of PBS was remarkably reduced after chain extension with benzoyl peroxide. Tawfik et al. 16 found

Self-cross-linking kinetics of unsaturated polyester poly(fumaric-co-itaconic-co-butanediol)

“…Unsaturated polyester based on saturated acids and an unsaturated acid, for example, maleic acid (MA) or fumaric acid (FA), condensed with a dihydric alcohol is a thermosetting resin used widely in many fields, such as biomedical area, agricultural area, biodegradable plastics, toner, and polyurethane. [1][2][3][4] The process of crosslinking of C¼C in polyester is very complex, which is governed by several factors, such as the chemical and physical characteristics of the polymer blend components as well as the cross-linking agent, along with the cure time and temperature, among others. 5 Several studies have been carried out on the cross-linking reaction, and the cure of unsaturated polyester resin is of considerable importance for the optimization of the many manufacturing processes.…”