Synthesis and Characterization of a New Copolymer Consisting of Polyamide 1210 and Reactive Phosphorus−Nitrogen Flame‐Retardant

Abstract

The thermal stability and reactivity of organophosphorus flame-retardants play a critical role in synthesizing copolymerized flame-retardant polyamides. Herein, this work successfully synthesizes a flame-retardant CEPPA-DDA salt (CDS) with both good thermal stability and high reactivity by reacting 2-carboxyethyl phenyl phosphonic acid (CEPPA) with 1,12-dodecanediamine (DDA). Flame-retardant polyamide 1210 (FRPA) is further prepared by copolymerizing the CDS, DDA, and sebacic acid (SEA). The test results show that the introduction of CDS can significantly improve the flame-retardant properties of FRPA. Specifically, the flame-retardant polyamide 1210 (FRPA-7) with 7 wt% CDS addition can reach V-0 grade according to UL-94 standard, accompanying limiting oxygen index value of 30.2% and tensile strength of 38.62 MPa. Compared with pure polyamide 1210, the peak heat release rate and total heat release rate of FRPA-7 reduce by 24.11% and 9.40%, respectively. This study provides a simple strategy to prepare flame-retardant polyamides with high flame retardancy and good mechanical properties, which are expected to show great potentials in future industrial applications.

Polyetheramine‐Type Semi‐Biobased Long‐Chain Polyamide 1210 Elastomer: Synthesis, Structure, and Unique Thermal Behavior

“…LCPAs, characterized by their lower amide bonding density, exhibit exceptional dimensional stability, low water absorption, low density, and processing temperature. [ 26,27 ] These properties contribute to enhancing flexibility and enable TPAEs with low hardness. Thus, studies have been conducted to prepare polyamide elastomers using PA1212 and PEA as the reaction segment.…”