Microwave absorbing and mechanical properties of alternating multilayer carbonyl iron powder-poly(vinyl chloride) composites
Microwave absorbing and mechanical properties of alternating multilayer carbonyl iron powder-poly(vinyl chloride) composites
复制标题
交替多层羰基铁粉-聚氯乙烯复合材料的吸波及力学性能
DOI：
10.1002/app.45846
复制
发表时间：
2018-03-20
影响因子：
3
通讯作者：
Guo, Shaoyun
中科院分区：
文献类型：
--
作者：
Gao, Yuan;Gao, Xiaoyan;Guo, Shaoyun
填充磁性吸收剂的聚合物复合材料已广泛用作微波吸收材料。然而，它们的高填料含量阻碍了其应用。为了优化填料含量，进一步提高吸波性能，通过纯PVC和CIP填充PVC交替堆叠，设计制备了交替多层羰基铁粉(CIP)/聚氯乙烯(PVC)复合材料。分别采用传输线理论对微波吸收性能进行了理论计算，并采用拱形法进行了实验测量。实验结果与计算结果一致，表明交替多层结构设计可以在不增加填料含量的情况下显着提高吸波性能。一致的结果还表明，多层复合材料的反射损耗（R-L）强烈依赖于层数和层排列顺序。最小 R-L (R-L-min) 和有效带宽与层数呈指数关系。当不同层面对入射波时，R-L-min和有效带宽对层数的依赖性表现出规律性反转现象。力学性能测试表明，随着层数的增加，交替多层复合材料具有增强的拉伸强度和断裂伸长率。 (c) 2017 年 Wiley periodicals, Inc. J. Appl。聚合物。科学。 2018, 135, 45846。
Polymeric composites filled with magnetic absorbents have been used extensively as microwave absorbing materials. However, their high filler content obstructed the application. In order to optimize the filler content and further improve the microwave absorbing properties, alternating multilayer carbonyl iron powder (CIP)/poly(vinyl chloride) (PVC) composites were designed and prepared by stacking neat PVC and CIP filled PVC alternately. The microwave absorbing properties were theoretically calculated by the transmission line theory and experimentally measured by the arch method, respectively. The experimental results were consistent with the calculated ones, which demonstrated that the alternating multilayer structure design can significantly improve the microwave absorbing property without increasing the filler content. The consistent results also demonstrated that the reflection loss (R-L) of the multilayer composites was strongly dependent on the layer number and layer arranging sequence. The minimum R-L (R-L-min) and effective bandwidth were exponentially dependent on the layer number. And the dependencies of the R-L-min and effective bandwidth on layer number exhibited a regularity reversal phenomenon when different layers faced to the incident wave. The mechanical property test showed that the alternating multilayer composites possessed enhanced tensile strength and elongation at break as the layer number increased. (c) 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 45846.