Cyanate/benzoxazine/epoxy system for high frequency copper clad laminate
The bisphenol F benzoxazine(BPF-BZ)and polyurethanemodified epoxy resin(PU-EP)with different mass fractions were added to the dicyclopentadiene cyanate(DCPD-CE)and the ternary blending system was obtained.Their effects on the curing reaction of the system were studied by fourier transform infrared spectroscopy(FTIR)and differential scanning calorimetric analysis(DSC).The copper clad laminate(CCL)was prepared with the ternary blending system as the matrix,and the dielectric properties,peel strength,thermal stability and wateruptakerate of the CCL were tested.The results showed that when the mass fractions of DCPD-CE,BPF-BZ and PU-EP were 70％,10％and 20％,respectively,the comprehensive performance of the system was the best.At this time,the T5％could reach 412℃.At 10 GHz the dielectric constant was 3.67 and the dielectric loss was 0.006 2.The water uptake rate was less than 1％in boiling water for 24 h.With the increase of BPF-BZ content,the comprehensive performance of the system could be decreased,but the peel strength of the CCL could be improved.
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