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This study presents the processability, fire behavior, and mechanical performance between the flame retarded pure epoxy resin and flame retarded glass-fiber-reinforced plastic before, during, and after a fire event. This enables a deeper understanding of the transferability of flame retardants, modes of action, char enhancement, and flame inhibition on composite materials
Fire resistance of fiber-reinforced polymers (FRPs) has been an important area of research for many years since FRPs are mainly used in the transportation and construction sectors. This study presents the fire behavior, and mechanical performance between the flame retarded pure epoxy resin and flame retarded glass-fiber composites before, during, and after a fire event. This enables a deeper understanding of the transferability of flame retardants on composite materials.
Several investigation groups have studied the flame-retardancy modes of action and properties of epoxy resins in the past; nevertheless, the selection of suitable flame retardants for epoxy resins remains challenging, and the transfer to fiber composites is difficult. The addition of flame retardants and glass fibers (GFs) to a polymeric system in a fire scenario changes the polymer's pyrolytic path and burning characteristics, reduces the heat released in the combustion, and suppresses the modes of action in the condensed and gas phase. In this study, the thermal analysis, flammability, fire behavior, residue analysis, fire stability, and quantification of modes of action of three different systems with three halogen-free flame retardants (melamine polyphosphate (MPP), ammonium polyphosphate (APP), and silane ammonium polyphosphate (SiAPP)) and three different types of GFs (unidirectional (UD), bidirectional (BD), and woven roving (WR)) will be compared with pure epoxy resin as a reference.