Investigations on Phthalonitrile – Cyanate ester blends and their light weight composites; Synthesis, thermal, mechanical and ablative characteristics

Phthalonitrile and Cyanate Ester-Based Carbon Foams for Effective Electromagnetic Interference Shielding Applications

“…The carbonization and further EMI shielding studies were conducted using PN, cyanate ester (CE, Phenolic Triazine PT-30), and a blend PN–CE, where the components were blended in equal weight ratios. The preparation and characterization of blend systems are reported in our previous publication . The formation of blends was confirmed through FTIR spectra; curing characteristics were analyzed by DSC; and rheology and thermal stability were analyzed by TGA (Figure S4).…”

“…PN−CE blends were prepared as follows. 22 PN and CE were taken in 1:1 weight ratio, and each was separately dissolved in acetone. After mixing the two dissolved resins, the blend was maintained at 60 °C in an air oven for solvent evaporation.…”

“…Polymers with inherent nitrogen content can engage in dipole interactions with electromagnetic waves by forming active spots on their surface that are either electron-rich or electron-deficient which can improve the EMI shielding performance. , Phthalonitriles (PN), a high-performance class of resins, have remarkable mechanical properties and exceptional flame resistance. − The outstanding thermal properties and high nitrogen content of PN makes them potential materials for EMI shielding applications. Another significant family of high-performance polymers with superior mechanical properties, high nitrogen content, and outstanding processability is cyanate ester (CE) resins. − It is expected that the formation of nitrogen-containing network in the cured resin blend comprising polycyanurate and polyphthalonitrile can influence the EMI shielding properties significantly.…”

The Catalytic Curing Reaction and Mechanical Properties of a New Composite Resin Matrix Material for Rocket Fuel Storage Tanks

“…The initial temperature, peak temperature, final temperature, and exothermic enthalpy of the curing reaction are shown in Table 1. The addition of several catalysts with a mass fraction of 0.1% resulted in a decrease in the curing temperature of BAFDCy, which was accompanied by a decrease in the exothermic heat of polymerization, producing a higher heat of polymerization [28,29]. The curing temperatures of BAFDCy could be significantly decreased by Mn(acac) 2 , Cr(acac) 3 , and DBDTL, whereas the curing temperatures of BAFDCy were significantly decreased by adding Cu(acac) 2 to BAFDCy, which reduced the peak curing temperature from 521 K to 444 K. The addition of different mass fractions of Cu(acac) 2 catalyzed the curing reaction of BAFDCy.…”

The effects of ZrSi2 on the ablation and insulation performances of low-density carbon-phenolic composites

“…Thermal protection systems (TPSs) are designed to protect high-velocity space vehicles from severe aerodynamic heating, which usually occurs when TPSs enter the atmosphere [1][2][3][4]. Ablative thermal protection materials, due to their stability and reliability, are widely used for spacecraft [5][6][7][8][9].…”