A novel organic rectorite modified bismaleimide/diallylbisphenol A system

Abstract

Abstract4,4′‐Bismaleimidodiphenylmethane (BMIPM)/O,O′‐diallylbisphenol A (BA) system was modified by organic rectorite (OREC) to develop a novel BMI/BA/OREC nanocomposite. The effect of OREC on the viscosity and reactivity of BMIPM/BA system was investigated. The mechanical properties of BMIPM/BA/OREC composites such as the flexural and impact strength were evaluated. The morphology of cured BMIPM/BA/OREC systems was investigated by X‐ray diffraction (XRD), transmission electron microscopy (TEM), and scanning electron microscopy (SEM). The hot water resistance of BMIPM/BA/OREC systems was discussed. The thermal property of BMIPM/BA/OREC systems was investigated using thermogravimetric analysis (TGA). The dynamic mechanical properties of BMIPM/BA/OREC systems were also measured. Results show that the addition of OREC has a significant influence on the reactivity of the BMIPM/BA system. Proper content of OREC can improve the flexural strength, impact strength, and hot water resistance of a BMIPM/BA system. The addition of OREC cannot decrease the thermal degradation temperature of cured BMIPM/BA system with a slight sacrifice of the glass transition temperature (Tg). Copyright © 2008 John Wiley & Sons, Ltd.

Unique liquid multi-maleimide terminated branched polysiloxane and its flame retarding bismaleimide resin with outstanding thermal and mechanical properties

“…However, when the loading of PMI-HSi is too large, then the homopolymer of PMI-HSi produced occupies a large concentration, leading to greatly reduced T di because PMI-HSi homopolymer has much lower T di . In literature, either thermoplastic polymer such as poly(aryl ether ketone) [25] or nano particle modified BMI system [37] has decreased T di in some degree (within 10 o C); while, attractively, PMI-HSi/BD resins can still exhibit the outstanding thermal stability as BD resin does. The ability of char formation under anaerobe condition has close relationship with the magnitude of LOI [38].…”

Morphology and thermal/mechanical properties of alkyl‐imidazolium‐treated rectorite/epoxy nanocomposites

“…Besides, with high strength and stiffness, the nanolayers play a role of the stress concentration sites in the epoxy matrix, which may lead to a lot of crazing and absorb some energy. On the other hand, the nanolayers can interact with the growing crack front, and resist the microcrack from propagating into macrocrack 21–23. As a result, the mechanical properties of nanocomposite are improved.…”

Preparation and properties of hollow silica tubes/bismaleimide/diallylbisphenol A composites with improved toughness, dielectric properties, and flame retardancy

“…However, with careful observation, the initial curing temperature of mHST‐ n /BDM/DBA shifts toward lower temperature, indicating that compared with BDM/DBA resin, there is a new reaction taking place in mHST‐ n /BDM/DBA composites. For BDM/DBA resin, its curing mechanism contains the copolymerization between BDM and DBA, and the homopolymerization of BDM;11 while in the case of mHST‐ n /BDM/DBA system, besides above reactions of BDM/DBA, there is a Michael reaction between maleimide and –NH 2 groups,9 which not only decreases the initial curing temperature, but also supplies chemical bonding between mHST and BDM/DBA (Scheme ), resulting in good dispersion of inorganic nanotubes in organic resin. In addition, note that these different curing mechanisms between BDM/DBA resin and mHST‐ n /BDM/DBA composites also lead to different macro‐performance.…”

“…Many investigations have shown that the properties of inorganic particles have a great influence on the properties of modified resins. For BDM resin, some inorganic particles such as aluminum borate whisker,9 clay,10, 11 and carbon nanotube12, 13 were used to improve the properties of BDM resin. These inorganic fillers can improve the toughness of original BDM resin, however, they usually do not improve the dielectric properties of BDM resin; in addition, the flame retardancy of these modified resins has not been studied.…”