Flame retarded polyamide-6 composites via in situ polymerization of caprolactam with perylene-3,4,9,10-tetracarboxylic dianhydride

Abstract

Flame retardant polyamide 6 (PA6) composites (PA6/PTCDA) were prepared by in situ polymerization of caprolactam with adding 0.01-2.5 wt% perylene-3,4,9,10-tetracar-boxylic dianhydride (PTCDA). The structure and properties of PA6/PTCDA composites were studied by Fourier transform infrared spectroscopy, X-ray diffraction, differential scanning calorimetry, thermogravimetric analysis, thermal conductivity, and limiting oxygen index (LOI) measurements. The results indicated that the crystallization of the PA6 chains was suppressed with 2.5 wt% PTCDA, and the LOI of the composite was 29.5. At the same time, the addition of PTCDA made the composites form a coke layer in the process of combustion, protecting the flammable components from volatilization and enhanced the flame retardant performance of the composites. This indicated that the PA6/PTCDA composite prepared by in situ polymerization possessed good flame retardant properties.

The Effect of AZ61 Content on Mechanical Strength and Surface Hardness of PA6-AZ61 Magnesium Alloy

“…PA6, being a polymer, shows 2 peaks corresponding to the crystalline phase. The diffraction peaks observed at 20° and 24° in the 2θ angle can be attributed to the reflections corresponding to the (200) and (002, 202) crystallographic planes in the alpha phase of PA6 [23].…”

Recent Advances in the Synthesis and Analysis of Polyamide 6 and Products Therefrom: From Polymerization Chemistry of ε-Caprolactam to Thermoplastic Resin Transfer Molding (T-RTM)

“…This can be considered as the major current trend in the field of the chemistry and processing of Polyamide 6, attempting mainly to reach short processing times to obtain advanced composite products, especially by T-RTM. The following classes of additives have been recently investigated for the in-situ polymerization of CL by AROP: flame retardants [10][11][12], fillers, such as titania [13], zinc oxide [14], boron nitride [15] silica [16], montmorillonite [17] and multi-walled carbon nanotubes [8,18,19], and reinforcing agents, like glass fiber [20,21] and carbon fiber [4]. It has to be noted that in spite of its importance usually neither the CL monomer conversion nor the average molecular weights and the molecular weight distribution (MWD) are determined in such instances.…”