Tin dioxide coated calcium carbonate as flame retardant for semirigid poly(vinyl chloride)

• Published in: Journal of applied polymer science Vol. 101; no. 1; pp. 731 - 738
• Main Authors: Xu, Jianzhong, Jiao, Yunhong, Zhang, Bo, Qu, Hongqiang, Yang, Guozhong
• Format: Journal Article
• Language: English
• Published: Hoboken Wiley Subscription Services, Inc., A Wiley Company 05.07.2006; Wiley
• Subjects: Applied sciences; Composites; Compounding ingredients; degradation; Exact sciences and technology; Fireproof agents; flame retardance; Forms of application and semi-finished materials; poly(vinyl chloride); Polymer industry, paints, wood; Technology of polymers; thermal properties; tin oxide; Thermooxidative degradation; Mechanical properties; Flame retardant; Dispersion reinforced material; Tensile property; Experimental study; Smoke reducer; Oxygen index; Composite material; Thermal stability; Thermal properties; Additive; Impact strength; Morphology; Calcium carbonate; Concentration effect; Tin Oxides; Coated particle; Polyvinyl chloride; Mechanism of action
• ISSN: 0021-8995; 1097-4628
• DOI: 10.1002/app.23972

The flame retardant and smoke suppressant properties of semirigid PVC treated with calcium carbonate (CaCO3), tin oxide (SnO2), the mixture of CaCO3/SnO2 and SnO2‐coated CaCO3 have been studied through the limiting oxygen index, char yield, and smoke density rating (SDR) methods. The thermal degradation in air of the treated semirigid PVC was studied by thermogravimetry (TG) and differential thermal analysis (DTA) from ambient temperature to 1073 K. The morphologies of the additives and the char formation were studied through SEM. The mechanical property was also studied. The results showed that the semirigid PVC treated with SnO2‐coated CaCO3 has a higher limiting oxygen index and char yield, lower SDR and MSDR, a more compact structure of char formation than the semirigid PVC without flame retardant and the semirigid PVC with the equivalent CaCO3, or SnO2, or the mixture of CaCO3/SnO2, a similar tensile property and greatly improved impact strength compared with that of the semirigid PVC without flame retardant. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 101: 731–738, 2006