Effect of Red Phosphorus Masterbatch on Flame Retardancy and Thermal Stability of Polypropylene/Thermoplastic Polyurethane Blends. Issue 2 (February 2015)

• Record Type: Journal Article
• Authors: Xu, Yang; Tang, Mengqi; Chen, Xiaolang; Chen, Man; Yu, Jie; Ma, Yonghong; Sun, Zhidan; Zhang, Zhibin; Lv, Jun
• Is Part Of: Polymers and polymer composites. Volume 23:Issue 2(2015)
• Page Start: 113
• Page End: 120
• Publication Date: 2015-02
• Subjects: Flame retardancy -- Thermal stability -- Composites; Polymers -- Periodicals; 668.905
• DOI: 10.1177/096739111502300208
• Languages: English
• ISSNs: 0967-3911

Abstract

In this work, red phosphorus masterbatch (RPM) was filled into polypropylene/thermoplastic polyurethanes (PP/TPU) blends as a halogen-free flame retardant. The flammability behaviour, thermal stability and mechanical properties were investigated by limit oxygen index (LOI), UL-94 vertical burning, cone calorimeter tests (CCT), thermogravimetric analysis (TGA), and scanning electron microscopy (SEM). The results showed that the addition of RPM improved the flame retardant performance of PP/TPU blends. The LOI values of the composites with RPM were higher than that of the PP/TPU blends, and the UL-94 V-2 rating was achieved for PP/TPU/RPM composites. The CCT results further indicated that the heat release rates (HRR), total heat release (THR), and the CO2 production rate (CO2 P) decreased in comparison with the PP/TPU blends. TGA data indicated that RPM greatly enhanced the thermal stability and char residues of PP/TPU blends. The addition of RPM deteriorated the tensile strength of the PP/TPU/RPM composites. However, the impact strength of the composites was improved.