Thermal and fire retardancy studies of clay‐modified unsaturated polyester/glass fiber composites

Abstract

The aim of this study was to investigate the effect of new, cation‐exchanged, and silane modified montmorillonite nanoclays fillers on thermal, mechanical and flammability characteristics of polyester/glass fiber composites in comparison with composites prepared with calcium carbonate filler. The coefficient of thermal expansion showed reduced values for silane‐modified samples. All the composites decomposed at lower temperatures in air and their degradation behavior differed from those exposed to nitrogen. The glass fibers acted as a physical barrier before combustion and the catalytic effect of the clay was less pronounced for silane‐modified samples. The peak of heat release and linear burning rate for the silane‐modified Cloisite 30B sample was reduced. However, the limiting oxygen index did not show significant changes. In general, consequent to clay addition, these composites showed improved fire performance, shorter fire duration and slower fire growth and maintained better mechanical properties than those with calcium carbonate filler. POLYM. COMPOS., 38:2743–2752, 2017. © 2015 Society of Plastics Engineers

Development of acrylic‐based powder coatings with incorporation of montmorillonite clays

“…In general, the T surface and T bottom curves showed a behavior similar to that found for TA/0. A similar trend has already been reported by Romanzini et al . when studying polyester and clay.…”

“…The latter is related to the degradation of the polymeric matrix and the organic MMT compounds. Above 500 °C, under oxygen atmosphere, the formation of ash and carbonized material occurred …”

“…However, in thermosetting resin systems, a similar migration could be hindered by crosslinked polymer networks, inhibiting the formation of a thermally insulating surface layer . Romanzini et al . studied the incorporation of MMT‐30B in thermosetting polymers and verified that crosslinked polymer networks hindered the clay migration.…”

Mechanical and ballistic analysis of aramid/vinyl ester composites

“…For this reason, there is an increasing demand for the use of polymeric composites in defense applications like naval ships, warplanes, armored vehicles and re-entry vehicles. [1][2][3][4] Aramid, carbon, ultrahigh molecular weight polyethylene and glass fibers are the main reinforcements that have been widely used in high-performance composites. Among these materials, aramid-reinforced composites are known to have one of the best protection-to-weight ratios, high impact and compressive strength, and thus it is commonly applied in components subjected to impact loads, as well as in the lightweight armors production.…”

Interlaminar fracture toughness, adhesion and mechanical properties of MWCNT–glass fiber fabric composites: Effect of MWCNT aspect ratios

“…However, with the rapid development of many industries such as aerospace systems, public transportation and wind turbines, the further enhancement of both mechanical properties and thermal stability are urgently required for GFRP composites. To achieve these aims, the incorporation of inorganic nanofillers involving nanofibers, nanosilicas, and nanoclays, has been proposed .…”