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Synthesis and characterization of isophorondiamine based epoxy hardeners from aminolysis of PET
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Synthesis and characterization of isophorondiamine based epoxy hardeners from aminolysis of PET
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Journal Article
Synthesis and characterization of isophorondiamine based epoxy hardeners from aminolysis of PET
2019
Overview
The solvolysis of poly(ethylene-terephthalate) (PET) is one of the most researched areas in chemical recycling. In this study PET aminolysis with isophorondiamine has been done - in opposition to recent trends - without excess reagent and the raw reaction product was further used without purification. The aminolysis product was thoroughly characterized with nuclear magnetic resonance (NMR) spectroscopy. Isophoronediamine was used as a solvent to prepare amine crosslinker solutions for epoxy resins. The effect of the concentration on the cross-linking reaction and thermomechanical properties were investigated. The curing reaction was found to be significantly accelerated by the presence of the aminolysis product. Both the ethylene-glycol and the terephthal-amide-diamines have a catalytic effect on the reaction. The glass transition temperature decreased with increasing concentrations of the cross-linker solutions due to the decreasing cross-link density. Thus, raw aminolysis products can be utilized for epoxy curing and are advantageous in modifying slower curing cycloaliphatic cross linker systems.
Publisher
Budapest University of Technology and Economics, Faculty of Mechanical Engineering, Department of Polymer Engineering,Budapest University of Technology and Economics
Subject
