M. Kirino et al., Structure-initiator activity dependence of aminimides as thermally latent initiators in the polymerization of glycidyl phenyl ether, J POL SC PC, 38(18), 2000, pp. 3428-3433
Citations number
14
Categorie Soggetti
Organic Chemistry/Polymer Science
Journal title
JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY
Novel aliphatic aminimides were synthesized from the corresponding carboxyl
ic acid esters, 1,1-dimethylhydrazine, and epoxides in 54-95% yields. Bulk
polymerization of glycidyl phenyl ether (GPE) with 3 mol % of the aminimide
s was evaluated by DSC as a model process for curing of epoxy resin. All th
e aminimides showed no exothermic DSC peak below 120 degrees C but showed s
harp exothermic peaks above 137 degrees C, indicating good thermal latency.
Good relationships were observed between the calculated bond length from t
he carbonyl carbon to the ct-carbon of the aliphatic group (R-C), DSC onset
temperatures, and the thermal dissociation temperatures (T-d's) of the ami
nimides. The aminimide with a longer R-C bond length showed lower T-d and D
SC onset temperature, that is, higher activity. (C) 2000 John Wiley & Sons,
Inc.