Effect of microencapsulation on thermal properties and flammability performance of epoxy composite |
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| Affiliation: | 1. Key Laboratory of Cellulose and Lignocellulosics Chemistry, Guangzhou Institute of Chemistry, Chinese Academy of Sciences, Guangzhou 510650, Guangdong, China;2. State Key Laboratory of Fire Science, University of Science and Technology of China, Hefei 230026, Anhui, China;1. Center for Advanced Composite Materials, Faculty of Engineering, The University of Auckland, Auckland, New Zealand;2. IMDEA Materials Institute, C/ Eric Kandel, 2, 28906 Getafe, Madrid, Spain;1. College of Materials Science and Engineering, Fujian Normal University, Fuzhou 350007, China;2. Fujian Key Laboratory of Polymer Materials, Fujian Normal University, Fuzhou 350007, China;1. Key Laboratory of Eco-functional Polymer Materials of the Ministry of Education, Key Laboratory of Eco-environmental Polymer Materials of Gansu Province, College of Chemistry and Chemical Engineering, Northwest Normal University, 967 Anning Road, Lanzhou, Gansu, 730070, China;2. Quangang Petrochemical Research Institute, Fujian Normal University, Quanzhou, 362801, China;3. Lanzhou Fire and Rescue Division, Lanzhou, Gansu, China |
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| Abstract: | The influence of microencapsulated ammonium polyphosphate (MFAPP) on flame retardancy, thermal properties and water resistance of epoxy (EP) composite were investigated by LOI, UL-94, DSC, TG, microscale combustion calorimeter (MCC) and TG-FTIR. The results of DSC show that the shell outside MFAPP can increase its compatibility in EP. EP/MFAPP containing only 9 wt% MFAPP can pass V-0 in the UL-94 test, while neat EP cannot pass any rating. Due to the presence of shell, water treatment show few effects on the flame retardancy of EP/MFAPP, while LIO values of EP/APP decrease remarkably after treatment. The presence of MFAPP can reduce the heat release rate and total heat release of EP significantly in MCC test. The reason is that MFAPP can stimulate the dehydration of EP at low temperature and retard the release of pyrolysis gas at high temperature. Moreover, a char formed via the reaction of EP and MFAPP has excellent thermal stability and can prevent underlying materials from further combustion during a fire. |
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