Mass Fraction Determination of Epoxy Groups
The produced resin will constitute a reaction between epoxy groups
and primary amide groups of gluten and millet proteins.
The reaction of monoester (generated by alcoholysis) with epoxy groups
was studied on the model reaction of CHS Epoxy 15 resin with Mono(isopropyl) maleic ester (M).
FTIR spectra showed the decreasing peak intensity of epoxy group
before and after polymer conjugation.
Using proton nuclear magnetic spectroscopy [(.sup.1)] H NMR), it was determined that 100% of the vinyl groups were converted to epoxy groups
This might be due to the lack of interfacial reaction induced by epoxy group
contained in EMMA-GMA (see Fig.
A stoichiometric amount (one epoxy group
corresponds to one anhydride group) of the acid anhydride was then added and the mixture was stirred.
Recently , the nonsubstituted imidazoles were ascertained to form adducts also with acid anhydrides catalyzing polyaddition reaction of oligomer's epoxy group
with anhydride epoxy group
followed by formation of a cross-linked polymer.
GC functional resins are synthesized by the reaction of an isocyanate functional compound with glycidol to yield a carbamate (urethane) linkage (-NHCO-) and reactive epoxy group
. The combination of both functionalities in a single resin structure imparts excellent mechanical and chemical properties to the coatings.
The symmetrical ring breathing vibration of the epoxy group
appeared at 1282 [cm.sup.-1] and the asymmetrical stretching of the epoxy ring was observed at 994 [cm.sup.-1] (25,26) The C-H out-of-plane bending vibration of aromatic ring appeared at 859 and 743 [cm.sup.-1].
The present invention is a thermoplastic elastomer composition comprising an ethylene-vinyl alcohol copolymer and a modified rubber dispersed in the ethylene-vinyl alcohol copolymer, wherein the modified rubber has an acid anhydride group or epoxy group
and is dynamically crosslinked by a compound having at least two amino groups.
2 indicate that amine has greater affinity toward the hydroxyl group in water than to the epoxy group
. Furthermore, water absorption is a weak function of the "ambient temperature-induced" primary degree (1[degrees]) amine-epoxy reaction (or[[alpha].sub.0]), which is expected to progress until the resin [T.sub.g] approaches the ambient temperature, where it vitrifies.