Synthesis and characterization of isophorondiamine based epoxy hardeners from aminolysis of PET

eXPRESS Polymer Letters

L. Karpati¹ 

关键词: polymer synthesis;    molecular engineering;    thermosetting resins;    recycling;   

DOI  :  10.3144/expresspolymlett.2019.52

学科分类：生物科学（综合）

来源: eXPRESS Polymer Letters

【 摘 要 】

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 reagentand the raw reaction product was further used without purification. The aminolysis product was thoroughly characterizedwith nuclear magnetic resonance (NMR) spectroscopy. Isophoronediamine was used as a solvent to prepare amine crosslinkersolutions for epoxy resins. The effect of the concentration on the cross-linking reaction and thermomechanical propertieswere investigated. The curing reaction was found to be significantly accelerated by the presence of the aminolysisproduct. Both the ethylene-glycol and the terephthal-amide-diamines have a catalytic effect on the reaction. The glass transitiontemperature decreased with increasing concentrations of the cross-linker solutions due to the decreasing cross-linkdensity. Thus, raw aminolysis products can be utilized for epoxy curing and are advantageous in modifying slower curingcycloaliphatic cross linker systems.

【 授权许可】

CC BY