Abstract
AbstractThe curing reaction of an epoxy resin and acid anhydride with an amine and/or alcohol was studied kinetically. No etherification reaction occurred at 70–140°C. and the initial reaction rate was proportional to the concentration of epoxide, acid anhydride, and catalyst (tertiary amine or alcohol). The apparent activation energies of the reaction in two systems of epoxy resin–hexahydrophthalic anhydride/triethanolamine (0.5 wt. %) were obtained as 14.1 and 14.4 kcal./mole. The effects of the substitution R of the tertiary amine NR3 or alcohol R3COH as catalyst on the curing reaction of the epoxy resin and acid anhydride were studied. The polar reaction constant ρp for amines, obtained negatively, indicates that electron‐repelling substituents of NR3 increase the curing rate; ρp for alcohols, obtained positively, indicates that electron‐withdrawing substituents of R3COH increase the rate of curing reaction. These results supported the proposed curing mechanism better.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
