التفاصيل البيبلوغرافية
| العنوان: |
结构/隐身一体化宽频聚甲基丙烯酰亚胺吸波泡沫的制备与性能. (Chinese) |
| Alternate Title: |
Preparation and Performance of Structural/Stealth Integrated Broadband Polymethacrylimide (PMI)Wave Absorbing Foam. (English) |
| المؤلفون: |
曹波, 徐伟伟, 刘雨杭, 李博, 黄奕森, 袁牧山, 狄肖创, 衡正光, 梁梅, 陈洋, 邹华维 |
| المصدر: |
Polymer Materials Science & Engineering; 2023, Vol. 39 Issue 4, p129-138, 10p |
| Abstract (English): |
Foam sandwich type structural composites are ideal for radar absorbing materials due to their advantages of light weight, broadband, high efficiency, and compatibility. The new polymethacrylimide foam has received a lot of attentions in the field of high- performance sandwich structural composites because of its good mechanical properties, heat deflection temperature and chemical stability. Polymethacrylimide (PMI) foam doesn’t have microwave absorption performance, therefore, a significant number of absorbers is required. However, absorbers are usually dense and easy to precipitate. If no anti- precipitation technology or uniform dispersion technology is conducted, the absorbers will encounter serious sedimentation problems during the polymerization process, and then will be difficult to exert its maximum effect and the original mechanical properties of the foam will be seriously damaged. Therefore, in this work, through the improvement of the preparation process of polymethacrylimide absorbing foam, the influences of tackifier, cross-linker and absorbing agent content on the structure and performance of the foams were systematically studied, and the absorbing agent was uniformly dispersed in the foams through the silica tackifying process, and the absorbing foam with excellent mechanical properties and wave absorption performance was successfully prepared. The high-temperature compression strength reaches more than 0.7 MPa and can achieve full- frequency absorption within 2~18 GHz. The method and key control factors for the preparation of integrated structure/stealth broadband polymethacrylimide absorbing foam were obtained. [ABSTRACT FROM AUTHOR] |
| Abstract (Chinese): |
由于泡沫夹芯型结构复合材料具有轻质、宽频、高效、兼容等优点，是雷达吸波材料的理想选择。新型聚甲基丙 烯酰亚胺泡沫因具有良好的力学性能、热变形温度和化学稳定性，受到高性能夹层结构复合材料领域的广泛关注。为 了使聚甲基丙烯酰亚胺（PMI）泡沫具有吸波功能，在制备PMI泡沫的过程中需要加入吸波剂，但是吸波剂通常密度较 大、易沉淀。若没有在制备方法中使用防沉淀技术或均匀分散技术，吸波剂在聚合过程中会出现严重沉降，吸波剂难 以发挥最大功效，且泡沫原有的力学性能降低严重。因此，文中通过对聚甲基丙烯酰亚胺吸波泡沫制备工艺的改进， 系统研究了增黏剂、交联剂及吸波剂含量对泡沫结构与性能的影响，通过二氧化硅增黏工艺，使吸波剂在泡沫中分散 均匀，成功制备了力学性能及吸波性能优异的吸波泡沫，高温压缩强度到达0.7 MPa以上，并且可在2~18 GHz实现全 频吸收，获得了具有结构/隐身一体化宽频聚甲基丙烯酰亚胺吸波泡沫的制备方法。 [ABSTRACT FROM AUTHOR] |
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| قاعدة البيانات: |
Complementary Index |
