Structural characterization of fillers of inorganic materials in bismaleimide resins

Abstract

Because of its dimensional stability, minimal shrinkage, chemical and fire resistance, good mechanical qualities and high resistance to a variety of solvents, acids and water, bismaleimide (BMI) thermosetting polymers are mostly employed in aerospace applications. Corrosion prevention has also been accomplished using BMI coating. The addition of inorganic materials like metal oxides can influence the properties of BMI as an inorganic–organic composite. Ferric chloride–bismaleimide (FeCl3–BMI) and titania–bismaleimide (TiO2–BMI) composites were synthesized. Fillers of inorganic compounds like MnO2, Ni (NO3)2·6H2O and Al2(SO4)3 were synthesized as well. The structural and crystalline configuration as well as physicochemical changes were thoroughly studied by XRD and Fourier transform infrared spectroscopy (FTIR).

Bismaleimide - Aluminium sulphate blends as 3D printing ink

“…With rise in temperature there is diminishing of sharp peaks which is indicative of the fact that crystallinity is decreased. This may be due to production of excess amorphous carbon due to heating as well as flocculating property of aluminium sulphate which was also evident from the fact that the colour changes from greenish black to black with rise in temperature as reported previously [12]. The line profiles shown the larger crystallites formed because of coalescence of the crystallites are almost three times larger.…”

Faster Curing in BMI for 3D Printing Ink

“…Figure 1a shows the typical structure of these compounds) [7,9]. The crystalline and structural configuration of the composite system has been reported earlier [8][9][10][11][12].…”

“…A smaller maleimide double bond width is indicative of a faster curing rate (Figure 2a, b). A TGA-DSC plot of heat-treated BMI (Figure 2c) is shown in Figure 2d which shows weight loss and is indicative of the fact that after 370 o C, crystalline nature is obtained [12]. The sample before and after the study is shown as an inset.…”

“…Homide 250 (Diamino diphenyl methane bismaleimide-diamino diphenyl methane copolymer) was used as the BMI details of which are given in ref [2,6,7,12]. The process consisted of BMI being dissolved in distilled water and stirred with PVA and stirred.…”

Bismaleimide blends as novel composites for mechanochemical protection of in-service components

“…Homide 250 (Diamino diphenyl methane bismaleimide-diamino diphenyl methane copolymer) was used as the BMI details of which are given in ref [2,6,11]. The process consisted of BMI being dissolved in distilled water and stirred with PVA and stirred.…”