Synthesis and Properties of a Novel ,Liquid ,Trifunctional Cycloaliphatic Epoxide

摘要

A novel cycloaliphatic triepoxide,1,1-bis(2',3'-epoxycyclohexyloxymethyl3,4-epoxycyclohexane(II) ,and isprecursor,1,1-bis(2'-cyclohexenyloxymethy)-3-cyclohexene,were synthesized .Their chemical structures were confirmed with IR spectroscopy,elemental analysis,and ~1H NMR spectroscopy.II was easily cured with hex ahydro-4-methylphthalic anhydride with 1,3,5-triethylhexahydro-s-triazine as a curing accelerator.Th3e physical properties of the cured product were examined with thermomechanical analysis,thermogravimetric analysis,and dynamic mechanical analysis Com pared with the commercial diepoxide ERL-4221 under the same curing conditions,the cured product based on II showed a much higher glass-transition temperature(198 deg C) ,a higher crosslinking density(2.80X10~(-3 mol/cm~3)),and a lower coefficient of thermal expansion [6.2X10~5(/ deg C)].II may become a promising candidate material for modern microelectronic packaging.