Preparation and characterizations of flame retardant polyamide 66 fiber

2017 Global Conference on Polymer and Composite Materials

材料科学;化学

Li, Y.Y.^1 ; Liu, K.^1 ; Xiao, R.^1

State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai

201620, China^1

关键词: Crystallinities;    Flame retardancy;    Limiting Oxygen Index;    Polyamide 66;    Relative viscosity;    Thermoplastic materials;    Vertical burning tests;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/213/1/012040/pdf
DOI  :  10.1088/1757-899X/213/1/012040

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

The polyamide 66 (PA66) is one of the most important thermoplastic materials, but it has the drawback of flammability. So the flame retardant PA66 was prepared by condensation polymerization using nylon salt and DOPO-based flame retardant in this paper. Then the flame retardant PA66 fiber was manufactured via melt spinning. The properties of flame retardant PA66 and flame retardant PA66 fiber were investigated by relative viscosity, differential scanning calorimetry (DSC), tensile test, vertical burning test (UL94) and limiting oxygen index (LOI) test. Although the loading of the DOPO-based flame retardant decreased the molecular weight, the melting temperature, the crystallinity and the mechanical properties of flame retardant PA66, the flame retardancy properties improved. The flame retardant PA66 loaded with 5.5 wt% of DOPO-based flame retardant can achieve a UL94 V-0 rating with a LOI value of 32.9%. The tenacity at break decreased from 4.51 cN•dtex-1for PA66 fiber to 2.82 cN•dtex-1for flame retardant PA66 fiber which still satisfied the requirements for fabrics. The flame retardant PA66 fiber expanded the application of PA66 materials which had a broad developing prospect.