Toldy Andrea, Niedermann Péter, Pomázi Ákos, Marosi György, Szolnoki Beáta
Department of Polymer Engineering, Faculty of Mechanical Engineering, Budapest University of Technology and Economics, Budapest H-1111, Hungary.
Department of Organic Chemistry and Technology, Faculty of Chemical Technology and Biotechnology, Budapest University of Technology and Economics, Budapest H-1111, Hungary.
Materials (Basel). 2017 Apr 27;10(5):467. doi: 10.3390/ma10050467.
Carbon fibre reinforced flame-retarded bioepoxy composites were prepared from commercially available sorbitol polyglycidyl ether (SPE) cured with cycloaliphatic amine hardener. Samples containing 1, 2, and 3% phosphorus (P) were prepared using additive type flame retardants (FRs) resorcinol bis(diphenyl phosphate) (RDP), ammonium polyphosphate (APP), and their combinations. The fire performance of the composites was investigated by limiting oxygen index (LOI), UL-94 tests, and mass loss calorimetry. The effect of FRs on the glass transition temperature, and storage modulus was evaluated by dynamic mechanical analysis (DMA), while the mechanical performance was investigated by tensile, bending, and interlaminar shear measurements, as well as by Charpy impact test. In formulations containing both FRs, the presence of RDP, acting mainly in gas phase, ensured balanced gas and solid-phase mechanism leading to best overall fire performance. APP advantageously compensated the plasticizing (storage modulus and glass transition temperature decreasing) effect of RDP in combined formulations; furthermore, it led to increased tensile strength and Charpy impact energy.
由市售的山梨醇聚缩水甘油醚（SPE）与脂环族胺固化剂制备了碳纤维增强阻燃生物环氧树脂复合材料。使用添加剂型阻燃剂（FRs）间苯二酚双（二苯基磷酸酯）（RDP）、聚磷酸铵（APP）及其组合制备了含1%、2%和3%磷（P）的样品。通过极限氧指数（LOI）、UL-94测试和质量损失量热法研究了复合材料的燃烧性能。通过动态力学分析（DMA）评估了阻燃剂对玻璃化转变温度和储能模量的影响，同时通过拉伸、弯曲和层间剪切测量以及夏比冲击试验研究了力学性能。在含有两种阻燃剂的配方中，主要在气相起作用 的RDP的存在确保了气相和固相机制的平衡，从而带来最佳的整体燃烧性能。APP有利地补偿了组合配方中RDP的增塑（储能模量和玻璃化转变温度降低）效应；此外，它还提高了拉伸强度和夏比冲击能。
