Epoxy resin(E-51)was used to improve mechanical properties of cyanate ester resin by copolymerization with bisphenol A dicyanate ester.The influence of epoxy resin concentration,post cure temp-erature,hydrothermal aging and ultraviolet radiation aging on mechanical properties and dielectric properties of modified system was studied.The fracture surfaces of the broken specimens were examined by scanning microscopy(SEM).The modified system showed much higher fracture toughness.Inclusion of 30wt% epoxy resin led to 100% and 50% increase in the impact strength and flexural strength,respectively.The impact strength and flexural strength were found to increase with enhanced concentration of epoxy resin,and modified resin system put up typical toughness rupture.The resin system possessed the best dielectric properties after post cure for 2h at 200℃.Addition of epoxy resin concentration,hydrothermal aging and ultraviolet radiation aging caused increase of the dielectric constant and dielectric loss.However,the modified system belongs to excellent dielectric material,with epoxy resin concentration below 30wt%.
Key words
cyanate ester resin /
epoxy resin /
mechanical property /
dielectric property
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References
HAMERTON I.Chemistry and technology of cyanate ester resins [M].Glasgow:Chapman and Hall,199.2-4.
FANG T,SHIMP D A.Polycyanate esters:science and applications [J].Prog Polym Sci,1995,20(1):61-118.
HAMERTON I,BARTON M J,CHAPLIN A,et.al.The development of novel functionalised aryl cyanate esters Part 2.Mechanical properties of the polymers and composites [J].Polymer,2001,42(6):2307-2319.
TAKAO IIJIMA,TAKANORI MAEDA,MASAO TOMOI.Toughening of cyanate ester resin by N-phenylmastyrene Copolymers [J].Journal of Applied Polymer Science,1999,74(12),2931-2939.
HWANG J W,PARK S D,CHO K,et al.Toughening of Cyanate Ester Resins with Cyanated Polysulfones [J].Polymer,1997,38(8):1835-1843.
BORRAJO J,et al.Rubber-modified cyanate ester:the modynamic analysis of phase separation [J].Polymer,1995,36(18):3451-3457.
LIN RONG-HSIEN,JIUN-HSIEN HSU.FT-IR and DSC investigation on the cure reaction of the dicyanate/diamine system [J].Polymer International,2001,50(10),1073-1081.
MARIE-FLORENCE GRENIER-LOUSTALOT,CHRISTINE LARTIGAU.Influence of the stoichiometry of epoxy-cyanate systems(Non-catalyzed and catalyzed)on molten state reactivity[J].Journal of Polymer Science,part A:Polymer Chemical,1997,35(15):3101-3115.
DONA MATHEW,REGHUNADHAN NAIR P C,NINAN K N,Bisphenol a dicyanate-novolac epoxy blend:cure charac-teristics,properties,and application in composites [J].Journal of Applied Polymer Science,1999,74(7):1675-1685.
包建文,唐邦铭,陈祥宝.环氧树脂与氰酸酯共聚反应研究[J].高分子学报,1999,(2):151-155.
LIANG Guo-zheng,ZHANG Ming-xi.Enhancement of procesability of cyanate ester resin via copolymerization with epoxy Resin [J].Journal of Applied Polymer Science,2002,85(11):2377-2381.
陈平,刘胜平,宋永贤.环氧树脂与氰酸酯共固化产物性能的研究[J].高分子学报,1993,(4):486-489.
梁国正,顾嫒娟.双马来酰亚胺树脂[M].北京:化学工业出版社,1997.
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