Xu Du , Fuping Li , Feng Qin , Jiabao Chu , Wei Dang , Xu Hu , Xinyuan Zhang , Kang Zhao , Yufei Tang
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引用次数: 0
Abstract
Ceramizable EPDM composites have great applications in the fields of aerospace, automotive, power and energy industry due to their low density, high filling capacity, and exceptional aging and heat resistance. Additionally, ceramizable EPDM composites can form stable ceramic phases at elevated temperature and thus possess superior ablation resistance in comparison with traditional EPDM composites. This paper endeavors to summarize the current status and future perspectives of ceramizable EPDM composites, including the ceramization methods, mechanical properties, thermal insulation and ablation resistance. Currently, ceramization methods for EPDM composites mainly consist of the addition of reinforcing fillers and graft modification. The characteristics of different reinforcing fillers such as granular fillers, fiber fillers and carbon nanofillers are discussed, focusing on the preparation process and filler/EPDM compatibility. In addition, the mechanical properties, thermal insulation and ablation resistance achieved by different ceramization methods together with the strengthening and ablative mechanism are analytically compared and discussed. Tensile strength reinforced by granular fillers is lower than that of fiber fillers due to their poor compatibility, while carbon nanomaterials endow EPDM composites with better ablation resistance but poor thermal insulation because of the permeable networks. Graft modification can improve the mechanical properties and thermal insulation, but it is limited by the lower ceramic yield. The recorded data and proposed analysis would provide fundamental guidance for the design and development of novel ceramizable EPDM composites.
期刊介绍：
Polymer Degradation and Stability deals with the degradation reactions and their control which are a major preoccupation of practitioners of the many and diverse aspects of modern polymer technology.
Deteriorative reactions occur during processing, when polymers are subjected to heat, oxygen and mechanical stress, and during the useful life of the materials when oxygen and sunlight are the most important degradative agencies. In more specialised applications, degradation may be induced by high energy radiation, ozone, atmospheric pollutants, mechanical stress, biological action, hydrolysis and many other influences. The mechanisms of these reactions and stabilisation processes must be understood if the technology and application of polymers are to continue to advance. The reporting of investigations of this kind is therefore a major function of this journal.
However there are also new developments in polymer technology in which degradation processes find positive applications. For example, photodegradable plastics are now available, the recycling of polymeric products will become increasingly important, degradation and combustion studies are involved in the definition of the fire hazards which are associated with polymeric materials and the microelectronics industry is vitally dependent upon polymer degradation in the manufacture of its circuitry. Polymer properties may also be improved by processes like curing and grafting, the chemistry of which can be closely related to that which causes physical deterioration in other circumstances.
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