Thermal performance, mechanical property and fire behavior of epoxy thermoset based on reactive phosphorus-containing epoxy monomer

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• 作者：Liping Gao ; Guangyao Zheng ; Xiaoan Nie…
• 关键词：Reactive phosphorus ; containing epoxy monomer ; Renewable diphenolic acid ; Thermal property ; Flame retardancy ; Fire behavior
• 刊名：Journal of Thermal Analysis and Calorimetry
• 出版年：2017
• 出版时间：February 2017
• 年：2017
• 卷：127
• 期：2
• 页码：1419-1430
• 全文大小：
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Physical Chemistry; Analytical Chemistry; Polymer Sciences; Inorganic Chemistry; Measurement Science and Instrumentation;
• 出版者：Springer Netherlands
• ISSN：1588-2926
• 卷排序：127

文摘

In this work, renewable diphenolic acid was used to prepare reactive phosphorus-containing epoxy monomer (PCDGEDP) and its chemical structure was characterized by FTIR, 1H-NMR and 31P-NMR spectra. Subsequently, PCDGEDP was reacted with diaminodiphenylmethane (DDM) to obtain phosphorus-containing PCDGEDP/DDM thermoset. The performances of corresponding thermoset in terms of thermal stability, mechanical property, combustion performance and fire behavior have been investigated in detail. It is worth noting that phosphorus-containing PCDGEDP/DDM thermoset showed high glass transition temperature (127 °C), good thermal stability with high mass residue (16.1 % at 700 °C) as well as good mechanical properties. Meanwhile, phosphorus-containing PCDGEDP/DDM thermoset exhibited improved flame retardant property with UL-94V-0 grade and high LOI value (29.6 %). Moreover, incorporating reactive phosphorus-containing epoxy monomer PCDGEDP into epoxy network can significantly decrease the heat release rate, total heat release, smoke produce rate, total smoke release and therefore enhance the fire safety of epoxy thermoset during combustion. It is implying that incorporating rigid phenyldiphosphate structure into epoxy molecular backbone can impart flame retardancy and smoke suppression properties to epoxy thermoset. It is tightly related to its higher phosphorus content (3.3 %) and higher mass residue (18.53 %) of phosphorus-containing PCDGEDP/DDM thermoset.