Preparation and properties of environmental friendly nonhalogen flame retardant melamine cyanurate/nylon 66 composites

Abstract

Melamine cyanurate (MCA) was utilized as an environmental friendly additive to prepare the nonhalogen flame retardant MCA/Nylon 66 composites by melt blending technique. Because of the strong hydrogen bond interactions and fine interfacial compatibility between MCA and Nylon 66, the resultant even dispersion of MCA filler in polymer matrix leads to the better toughness and strength of MCA/Nylon 66 composites than those of neat Nylon 66. Both Nylon 66 and MCA/Nylon 66 composites exhibit similar a-crystalline structure, but the presence of MCA influences the distribution of a1 and a2 crystalline phases in Nylon 66 by inducing its hydrogen-bonded sheet separation. Moreover, the blending of MCA and Nylon 66 increases the crystallization temperature and exothermicity but decreases the thermal stability of Nylon 66 and accelerates the degradation of MCA. The MCA/Nylon 66 composites show better flame retardancy at intermediate MCA contents of 10 and 15 wt %.

Highly dispersed melamine cyanurate flame-retardant epoxy resin composites

“…As shown in Fig. (a), the strong absorption peaks at 3392.6 and 3231.6 cm −1 are assigned to symmetric and asymmetric stretching vibrations of NH or NH 2 groups, 1780.7 and 1738.7 cm −1 to the stretching vibration of CO groups, 1663.5 cm −1 to the stretching vibration of CN bond and 1388.3 cm −1 to CN vibration . All of these characteristic peaks are in accordance with those of MCA synthesized in water (Fig.…”

Aluminum hypophosphite microencapsulated to improve its safety and application to flame retardant polyamide 6

“…Meanwhile, this method has advantages of high yield, environmental friendly and efficient. Second, MCA is a kind of high effective and widely used flame retardant with noncorrosion, innocuity and excellent thermal stability [24]. It should form a nitrogen-phosphorous (N-P) synergetic system with AHP to show better flame-retardant property than that with other capsule materials.…”

“…Melamine cyanurate (MCA), as an environment friendly and nitrogen-based flame retardant [24], is the preferred candidate. First, it is synthesized in aqueous system by a molecular selfassembly process [25] that cyanuric acid and melamine can form hydrogen bond with inorganic acid or alkali metals compounds as a catalyst (Fig.…”

Mechanical properties improvement and fire hazard reduction of expandable graphite microencapsulated in rigid polyurethane foams

“…Melamine cyanurate (MCA), as an environment friendly and widely used nitrogen‐based flame retardant with noncorrosion, innocuity and excellent thermal stability, can be used as a capsule material . MCA is synthesized by cyanuric acid (CA) and ME (Fig.…”