Metallization and APPJ treatment of bismaleimide

Abstract

Bismaleimide (BMI) resins are a new breed of thermosetting resins used mainly for high temperature applications and have major usage in aerospace. FTIR studies have shown the signatures of imide, CNC stretching, malemide and N-H stretching. These BMI polymer coatings were deposited on aluminum and mild steel substrates by sprinkling powers followed by baking.Thermo gravimetric analysis and Differential scanning calorimetric studies showed the degradation temperature of these polymers around 370 o C. Aluminum coatings were deposited on BMI previously deposited on Al and mild steel to make a metal-BMI-metal trilayer. These trilayers can solve the problem charging of the aircraft bodies at high altitudes. Atomic force microscopy was done to determine the morphology of the surface. Roughness and thickness measurements of the BMI coatings were carried out by surface profilometer. Vickers microhardness tests showed an increase in hardness of the metal-BMI-metal trilayer. FTIR spectrum showed signature of imides, CNC stretching, maleimide and N-H stretching in BMI.We observed that peak broadens at which shows the release of the stress during thermal treatment of the coating. The coating is subject to variable APPJ conditions which improve the properties at high temperature.

Faster Curing in BMI for 3D Printing Ink

“…BMI monomers are molecules with two maleimide functional groups terminating them; they frequently contain several aromatic moieties to improve their curing properties. 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].…”

“…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.…”

Recent progress in bio‐based eugenol resins: From synthetic strategies to structural properties and coating applications

“…The same photo‐induced curing reaction pathway was for PGE‐EUN, S4P, and BMI, followed by thermal curing at 100–230°C, resulting in the PGE‐EUN/S4P/BMI resin. Based on the FTIR description, the bands at 689 and 829 cm −1 in PGE‐EUN/S4P/BMI disappeared, indicating that the maleimide group reacted with thiol moiety during the thermal curing 36,37 . Moreover, the thiol‐ene polymerization reaction may be possible between maleimide and thiol moiety during the photo‐curing reaction 38,39 .…”