Abstract
One part epoxy resin is made of liquid epoxy monomer,solid curing agent and filler. And it is transformation from liquid to solid by just heating.This transformation is due to the fact that solid latent curing agent dissolves in liquid epoxy monomer by heat,and a chemical reaction is induced between them.However one part epoxy resin has a critical problems for storage stability since the viscosity increased slowly even under room temperature.This is due to the fact that one part epoxy is premixed liquid monomer and solid curing agent,and they react each other between the interface.Particularly,when imidazole compounds or tertiary amines are used as chain transfer curing agent,storage stability of one part epoxy resin is well known to decrease even under room temperature.Nonetheless,how the molecular structure of curing agent influences storage stability is not clear.Here we clarified the self-assembled structure of long alkyl imidazole as solid curing agent,using X-ray diffraction and FT-IR.It is found that the self-assembled structure of curing agent sharply influenced the storage stability of one part epoxy resin.
