Thermal and dielectric properties of bismaleimide‐triazine resins containing octa(maleimidophenyl)silsesquioxane

Abstract

Octa(maleimidophenyl)silsesquioxane (OMPS) was synthesized, characterized, and employed to modify the BT resin which composed of 4,4 0 -bismaleimidodiphenylmethane (BMI) and 2,2 0 -bis(4-cyanatophenyl)propane (BCE). The curing reaction between OMPS and BT resin was first investigated. It was found that OMPS accelerate the curing reaction of BCE, and the onset temperature of the cyclotrimerization was reduced up to 95.58C (by DSC). As demonstrated by DSC and FTIR, there was no evidence that indicated the coreaction between maleimide and cyanate ester. 2,2 0 -diallyl bisphenol A (DBA) and diglycidyl ether of bisphenol A (E-51) (Wuxi Resin Factory, Jiangsu Province, China) were also used to enhance the toughness of BT resin, and the formulated BTA (containing DBA) and BTE (containing E-51) resins were obtained. The thermal properties of BT, BTA, and BTE resins incorporated with OMPS were then investigated. The results of DMA and TG showed that the BT, BTA, and BTE resins containing 1 wt % of OMPS exhibit enhanced thermal properties in comparison with their pristine resins respectively, while more contents of OMPS may impair the thermal properties of the polymer matrix, though the effect of OMPS was slight. Finally, the dielectric constant of these hybrid materials were detected, and their dielectric constant were distinctly reduced by the incorporation of OMPS, while overmuch contents of OMPS were disadvantageous for dielectric constant because of the aggregation of OMPS.

High glass transition temperature bismaleimide‐triazine resins based on soluble amorphous bismaleimide monomer

“…It is worth pointing out that the methyl proton and the quaternary carbon of CACH 3 show unusual double peaks, which were also reported by Lin. 26 There is only one single peak at 35.69 ppm in 31 P NMR, in accord with the phosphorus structure in DOPO-BMI. All the results are in good agreement with the proposed structure of DOPO-BMI as shown in Scheme 1.…”

“…30 It suggested that BADCy self-polymerized and gave a triazine structure (I). Absorption at 690 cm 21 belonged to carbon-carbon double bond of maleimide 31 weakened as the cure temperature rose, which implied that the homopolymerization of DOPO-BMI (II) or the co-curing of DOPO-BMI and BADCy occurred at high temperatures. According to the research of Lin 30 , the characteristic absorption at 1365 cm 21 may be presumably attributed to the pyrimidine structures (III) and the pyridine structures (IV) which are formed via the co-reaction of bismaleimide and cyanate resin.…”

SAXS and DSC studies on the structural characteristics of siliconized s-triazine glassy hybrid materials

“…A broad variety of molecular, macromolecular and polymeric substances can be prepared to meet these criteria. The design and synthesis of such materials mainly rely on the formation of molecular and macromolecular structures comprised of geometrically diverse building blocks [10][11][12][13][14][15]. In particular, the synthesis of materials comprising aromatic/heteroaromatic and polyhedral building blocks provide a good opportunity to generate vitreous-glassy systems.…”

Sol–gel synthesis and characterization of polyimides based on the reaction of butane‐1,2,3,4‐tetracarboxylic acid with 3‐aminopropyltriethoxysilane

“…Various attempts had been undertaken to synthesize PI/SiO2‐based materials in order to produce hybrid materials with novel properties 8, 16–20…”