Studies on thermal and morphological properties of 1,1‐bis(3‐methyl‐4‐cyanatophenyl)cyclohexane‐epoxy‐bismaleimide matrices

Abstract

A new cyanate ester monomer, 1,1‐bis(3‐methyl‐4‐cyanatophenyl)cyclohexane has been synthesized and characterized. Epoxy modified with 4, 8 and 12% (by weight) of cyanate ester were made using epoxy resin and 1,1‐bis(3‐methyl‐4‐cyanatophenyl)cyclohexane and cured by using diaminodiphenylmethane. The cyanate ester modified epoxy matrix systems were further modified with 4, 8 and 12% (by weight) of bismaleimide (N,N′‐bismaleimido‐4,4′‐diphenylmethane). The formation of oxazolidinone and isocyanurate during cure reaction of epoxy and cyanate ester blend was confirmed by IR spectral studies. Bismaleimide‐cyanate ester‐epoxy matrices were characterized using differential scanning calorimetry (DSC), thermogravimetric analysis (TGA) and heat deflection temperature (HDT) analysis. Thermal studies indicate that the introduction of cyanate ester into epoxy resin improves the thermal degradation studies at the expense of glass transition temperature. Whereas the incorporation of bismaleimide into epoxy resin enhances the thermal properties according to its percentage content. However, the introduction of both cyanate ester and bismaleimide influences the thermal properties according to their percentage content. DSC thermogram of cyanate ester modified epoxy and bismaleimide modified epoxy show unimodel reaction exotherms. The thermal degradation temperature and heat distortion temperature of the cured bismaleimide modified epoxy and cyanate ester‐epoxy systems increased with increasing bismaleimide content. The morphology of the bismaleimide modified epoxy and cyanate ester‐epoxy systems were also studied by scanning electron microscopy. Copyright © 2003 John Wiley & Sons, Ltd.

Unsaturated Polyester Resins: Chemistry and Technology

“…The morphology and multi-phase structure were characterized. A multicomponent IPN system was created using an epoxy resin, a bismaleimide, a cyanate ester, and components which form a UPR [90]. As the cyanate ester, 1,1-bis(3-methyl-4-cyanatophenyl)cyclohexane was applied, whereas N,N -bismaleimido-4,4 -diaminodiphenylmethane was used as the bismaleimide component.…”

Synthesis and characterization of novel antibacterial poly(imidosulfide)/Ag nanocomposite

“…Many efforts have been made to overcome their disadvantage [1][2][3]. One of the appropriate reactions is the Michael addition reaction of BMI [4,5] with different nucleophiles such as diamines [6][7][8][9][10][11], bisthiols [12][13][14][15][16][17], bisphenols, etc.…”

Curing behavior and processability of BMI/3‐APN system for advanced glass fiber composite laminates

“…Thermoset/thermoset blend is a promising approach due to the synergistic effect exists in inter-cross-linked or interpenetrated polymer networks, producing considerable improvements in some properties. [5][6][7][8][9] For example, the modified resin systems based on BMI and epoxy have shown appropriate properties which improve the toughness and process of BMI resin and the thermal properties of epoxy. 7,8 Although most methods have been developed to improve various properties, there are very few successful examples based on BMI as adhesives.…”

“…[5][6][7][8][9] For example, the modified resin systems based on BMI and epoxy have shown appropriate properties which improve the toughness and process of BMI resin and the thermal properties of epoxy. 7,8 Although most methods have been developed to improve various properties, there are very few successful examples based on BMI as adhesives. 5,10,11 Phthalonitriles as high-temperature-resistant polymers have received increasing attention.…”