Novel aluminum phosphate/cyanate ester composites: Thermodegradation behaviors and kinetic analyses

Abstract

Thermodegradation behaviors of novel aluminum phosphate/cyanate ester (AlPO 4 (KH550)/CE) composites were studied in detail. Results show that thermodegradation behaviors and kinetic parameters of AlPO 4 (KH550)/CE composites are greatly dependent on the AlPO 4 (KH550) loading. The addition of AlPO 4 (KH550) into CE resin changes the thermodegradation mechanism (mainly at the temperature lower than 450 C) and degradation process from two steps to three steps. Comparing with CE resin, AlPO 4 (KH550)/CE composites have lower initial degradation temperature and greatly higher char yield. Besides, for each thermodegradation step, the more the AlPO 4 content, the smaller the activation energy value is. All reasons leading to these outcomes are investigated intensively.

Flame retardance and origin of bismaleimide resin composites with green and efficient aluminum phosphates

“…Huang's and Deng's associates pointed out that silica/AP and organosilicon/AP composites had good thermal stability. Our group found that cyanate ester (CE)/AP composites have much higher char yield ( Y c ) at high temperature than CE resin, and the experimental Y c values of the composites are higher than the value calculated using the “mixture rule” …”

“…Our group found that cyanate ester (CE)/AP composites have much higher char yield (Y c ) at high temperature than CE resin, and the experimental Y c values of the composites are higher than the value calculated using the "mixture rule". 24 Above researches have proved that AP has an obvious effect on improving the thermal stability of polymers, which provides a possibility for getting good flame retardance 25,26 ; however, this is not an inevitable trend. 27 Considering the importance and wide application as well as the nontoxicity, it is interesting to evaluate the flame retarding ability of AP.…”

Preparation and properties of aluminum phosphate‐polyethersulfone laminated composites modified by aluminosilicate fiber fabric

“…With the rapid development and wide applications of microwave heating technique in industrial field, the ideal wave‐transparent composite should not only possess ultrahigh mechanical strength, admirable thermal stability, and low dielectric constant but also excellent flexibility as well as good processability . Aluminum phosphate (AlPO 4 ) is a representative wave‐transmitting material, which has been extensively utilized in national defense, aviation aerospace, transportation, and other areas due to its high temperature resistance property and outstanding dielectric performance . However, the great brittleness, poor wear resistance, and complicated manufacturing process of this material have imposed restrictions on its practical applications as structural and functional composites.…”