Rigid polyurethane foams with halogen‐free flame retardants: Thermal insulation, mechanical, and flame retardant properties

• Published in: Journal of applied polymer science 2020-01, Vol.137 (1), p.n/a
• Main Authors: Akdogan, Emre, Erdem, Murat, Ureyen, Mustafa Erdem, Kaya, Metin
• Format: Article
• Language: English
• Subjects: Additives; Aluminum; composites; Compressive strength; Cone calorimeters; Flame retardants; foams; Materials science; mechanical properties; Mixtures; Plastic foam; Polymer matrix composites; Polymers; polyurethane; Polyurethane foam; Thermal conductivity; Thermal insulation; thermal properties; Weight; Zinc borate
• ISSN: 0021-8995; 1097-4628
• DOI: 10.1002/app.47611

ABSTRACT Rigid polyurethane foam (RPUF) composites with triphenyl phosphate (TPhP), aluminum trihydrate (ATH), and zinc borate (ZnB) alone, as well as their binary blends, were prepared via a one‐shot process. The amount of flame retardant (FR) or FR blend was varied from 10 to 50% by polyol weight percentage, and the weight fraction of the blends was also fixed at 40%. The effects of additives on thermal insulation, mechanical, and flame retardancy properties of the composites were investigated. Thermal conductivity of the neat foam (RPUF) decreased from 22.53 to 21.04–21.58 mW m−1 K−1. The compressive strength of foams displayed an increase with increasing the amount of TPhP, ATH, and ZnB till 40% by weight. The limited oxygen index values of all foams increased and the flame spread rates of all foams significantly decreased. It was also observed that the flame was self‐extinguished in some cases. The cone calorimeter test results indicated that the FR additives improved the flame retardancy of the RPUF. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2020, 137, 47611. Surface morphology and HRR profile of 30A/10T and 10Z/30T