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| Structure and property of co--curing reaction product for epoxy and cyanate resin system |
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| 大连理工大学 |
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Cite this article:
;. Structure and property of co--curing reaction product for epoxy and cyanate resin system. Chin J Mater Res, 2004, 18(3): 265-272.
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Abstract The influence of the behavior, mechanism, product structure and
relation of structure with properties for co-curing reaction of
epoxy resin and cyanate ester system catalyzed by transition metal
acetylaceton, etc. was studied. The results show that the accelerator
can obviously accelerate the co--curing reaction of the resin system and
decrease the cured temperature and curing time. The reactions
involved in the co--curing are: cyclodimerization and cyclotrimerization
of cyanate, polyetherfication of epoxy group and cyclotrimerization of
cyclic dimmer, as well as the formation of oxazolidone rings. In the
lack of cyanate functional groups, the main structures of cured compounds
are oxazolidone and polyether structure in the cured resin, and the
triazine ring structure is of minor importance. In the excess of cyanate
functional groups, the main structures are triazine ring and oxazolidone
structure in the cured resin, and the polyether structure is of minor
importance. The reactive activation energy and frequency factor of the
co--curing resin system increase with enhanced concentration
of cyanate. The thermal stability and dielectric properties of the cyanate
and epoxy resin curing system are also found to increase with enhanced
concentrations of cyanate in the same cured condition.
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Received: 19 July 2004
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