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Three-dimensional cross-linking structures in ceramifiable EVA composites for improving self-supporting property and ceramifiable properties at high temperature
Polymer Degradation and Stability ( IF 5.9 ) Pub Date : 2019-02-06 , DOI: 10.1016/j.polymdegradstab.2019.02.003
Dong Zhao , Menglu Xia , Yucai Shen , Tingwei Wang

Ceramifiable EVA composite with three dimensional cross-linking structures was prepared by bis (tert-butylperoxy) diisopropyl benzene (BIPB) as cross-linking agent, and silicate glass frits (SGF) and ammonium polyphosphate (APP) were utilized as additives. By using FTIR, DSC and measurement of gel content, the formation of cross-linking structures was studied. Rheometer and TGA were used to characterize the rheological properties and thermal stability of the composite. The effect of cross-linking structures on the self-supporting property and the ceramifiable properties of the composite was investigated. The apparent porosity of the ceramic residues was examined. XRD and SEM were used for the phase composition and morphology of the ceramic residues analysis respectively. Results suggested that the cross-linking reaction occurred in the EVA matrix and the SGF and APP have no effect on the cross-linking reaction. The formation of cross-linking structures improved the rheological properties and thermal stability of the composite, resulting in the improvement on self-supporting and ceramifiable properties. Further, we demonstrated that cross-linking structures as “skeletal structures” could support its own weight before inorganic crystalline phases appeared, which provided a necessary prerequisite for its excellent self-supporting property in the range of 0–1000 °C. In addition, it has been proved that the apparent porosity was decreased and the compactness of ceramic residues was enhanced after the cross-linking structures were formed.



中文翻译:

可陶瓷化EVA复合材料中的三维交联结构,可改善高温下的自支撑性能和可陶瓷化性能

以双(叔丁基过氧)二异丙基苯(BIPB)为交联剂,制备了具有三维交联结构的可陶瓷EVA复合材料,并以硅酸盐玻璃粉(SGF)和聚磷酸铵(APP)为添加剂。通过FTIR,DSC和凝胶含量的测量,研究了交联结构的形成。用流变仪和TGA表征复合材料的流变性能和热稳定性。研究了交联结构对复合材料自支撑性能和可陶瓷化性能的影响。检查了陶瓷残余物的表观孔隙率。XRD和SEM分别用于陶瓷残留物分析的相组成和形貌。结果表明交联反应发生在EVA基质中,而SGF和APP对交联反应没有影响。交联结构的形成改善了复合材料的流变性能和热稳定性,从而改善了自支撑和可陶瓷化的性能。此外,我们证明了交联结构作为“骨架结构”可以在无机结晶相出现之前支撑其自身的重量,这为其在0-1000°C范围内的出色自支撑性能提供了必要的先决条件。另外,已经证明,在形成交联结构之后,表观孔隙率降低并且陶瓷残余物的致密性提高。交联结构的形成改善了复合材料的流变性能和热稳定性,从而改善了自支撑和可陶瓷化的性能。此外,我们证明了交联结构作为“骨架结构”可以在无机结晶相出现之前支撑其自身的重量,这为其在0-1000°C范围内的出色自支撑性能提供了必要的先决条件。另外,已经证明,在形成交联结构之后,表观孔隙率降低并且陶瓷残余物的致密性提高。交联结构的形成改善了复合材料的流变性能和热稳定性,从而改善了自支撑和可陶瓷化的性能。此外,我们证明了交联结构作为“骨架结构”可以在无机结晶相出现之前支撑其自身的重量,这为其在0-1000°C范围内的出色自支撑性能提供了必要的先决条件。另外,已经证明,在形成交联结构之后,表观孔隙率降低并且陶瓷残余物的致密性提高。我们证明,在无机结晶相出现之前,作为“骨架结构”的交联结构可以支撑自身的重量,这为其在0-1000°C范围内的出色自支撑性能提供了必要的先决条件。另外,已经证明,在形成交联结构之后,表观孔隙率降低并且陶瓷残余物的致密性提高。我们证明,在无机结晶相出现之前,作为“骨架结构”的交联结构可以支撑自身的重量,这为其在0-1000°C范围内的出色自支撑性能提供了必要的先决条件。另外,已经证明,在形成交联结构之后,表观孔隙率降低并且陶瓷残余物的致密性提高。

更新日期:2019-02-06
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