Preparation, characterization and properties of a halogen-free phosphorous flame-retarded poly(butylene terephthalate) composite based on a DOPO derivative

• Published in: Journal of applied polymer science Vol. 130; no. 2; pp. 1301 - 1307
• Main Authors: Liu, Peng, Liu, Mingming, Gao, Chong, Wang, Feng, Ding, Yanfen, Wen, Bin, Zhang, Shimin, Yang, Mingshu
• Format: Journal Article
• Language: English
• Published: Hoboken, NJ Blackwell Publishing Ltd 15.10.2013; Wiley; Wiley Subscription Services, Inc
• Subjects: Applied sciences; Composites; Compounding ingredients; Derivatives; Exact sciences and technology; Fireproof agents; flame retardance; Flame retardants; Forms of application and semi-finished materials; Materials science; mechanical properties; Nuclear magnetic resonance; Polybutylene terephthalates; polyesters; Polymer industry, paints, wood; Polymers; Ratings; Reproduction; Technology of polymers; Terephthalate; thermal properties; Thermogravimetric analysis; viscosity and viscoelasticity; Viscoelasticity; Intrinsic viscosity; Ester polymer; Organic phosphinate; Mechanical properties; Flame retardant; Dispersion reinforced material; Tensile property; Organic anhydride; viscosity and viscoelasticity; Experimental study; Composite material; Thermal stability; polyesters; Thermal properties; Bending strength; flame retardance; Additive; Butene terephthalate polymer; Preparation; Concentration effect; Rheological properties
• ISSN: 0021-8995; 1097-4628
• DOI: 10.1002/app.39318

ABSTRACT A phosphorous flame retardant (DOPO‐MAH) was synthesized through the reaction between of 9,10‐dihydro‐9‐oxa‐10‐phosphaphenanthrene‐10‐oxide (DOPO) and maleic anhydride (MAH) and confirmed by FT‐IR, 1H NMR, and 31P NMR techniques. The obtained flame retardant was then melt blended with poly(butylene terephthalate) (PBT) to prepare flame retardant PBT/DOPO‐MAH composites. The composites were characterized by LOI, UL‐94, and mechanical tests as well as scanning electron microscopy, thermogravimetric analysis, and differential scanning calorimetry analysis. On adding 20 wt % DOPO‐MAH, LOI increased from 20.9 to 25.7 and the UL‐94 V‐0 rating was achieved, whereas the tensile and flexural properties were notably improved. Torque‐time profile during the melt blending and intrinsic viscosity of the composite indicated that DOPO‐MAH acted as both flame retardant and chain extender for the PBT matrix. The results showed that PBT/DOPO‐MAH composite is a promising material for its good comprehensive properties. © 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 130: 1301‐1307, 2013