Rheological, flame retardancy, and thermomechanical properties of polymethyl methacrylate composites: Effects of flame retardant and toughener. Issue 25 (16th April 2022)

• Record Type: Journal Article
• Authors: Yang, Bin; Xu, Xiang; Shi, Zhiqiang; Wang, Siyu; Chen, Xinya; Wang, Tiange; Ke, Yuchao; Zheng, Zhengzhi; Su, Lifen; Qian, Jiasheng; Xia, Ru; Jiang, Tao
• Is Part Of: Journal of applied polymer science. Volume 139:Issue 25(2022)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2022-04-16
• Subjects: fire performance -- flame retardant -- mechanical properties -- PMMA composite -- toughening; Polymers -- Periodicals; Polymerization -- Periodicals; 668.9
• DOI: 10.1002/app.52418
• Languages: English
• ISSNs: 0021-8995

Abstract

Abstract: In this work, polymethyl methacrylate (PMMA) composites modified with diethylaluminum phosphonate (ADP) and epoxy resin (EP) as flame retardant and toughener, respectively, were prepared via solution method for improvement on both flame retardancy and toughening purposes. The effects of ADP and EP loadings on the viscoelastic, flame retardant and thermomechanical behaviors of the resultant composites were intensively investigated using rheometer, CONE calorimetry, oxygen index (LOI) and dynamic mechanical thermal analysis (DMTA), respectively. Heat flux complexity was obviously displayed when ADP and EP loadings increased. DMTA result showed that the increase of the modulus of the composites was primarily due to an interpenetrating polymer network (IPN) formed by the addition of EP, and the tensile properties were found to be greatly improved. In addition, our study also showed that at an ADP loading of 28% the maximum heat release rate (pHRR) of composites decreased by 63% as compared to neat PMMA with increase by 88% in LOI and V‐0 grade in UL‐94 test achieved. The composites prepared in this study bore excellent fire performance together with desired toughness, and the current work thus has practical significance for further expanding the application range of PMMA composites. Abstract : The improved mechanical properties of the composites were found to be closely related to the presence of an interpenetrating polymer network (IPN) formed with the addition of EP, and an ADP loading of 28% led to an increase in LOI by 88% and V‐0 grade in UL‐94 test.