共查询到18条相似文献,搜索用时 593 毫秒
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环氧树脂改性聚氨酯弹性体材料 总被引:2,自引:0,他引:2
采用高分子共混法,通过向聚氨酯预聚体中加入环氧树脂(E-51)制备出了性能优良的弹性体材料。研究了E-51的加入量对弹性体力学性能的影响;用FT-IR和XRD表征了固化反应的过程以及产物的内部结晶状态;通过动态粘弹谱对比了改性前后材料的动态力学性能;测试了材料的透水系数。实验结果表明:E-51当加入量为25%,所得聚氨酯弹性体材料的内部出现了宽的聚合物峰,此时材料的力学性能与E-51的其他加入量相比最佳;材料的动态力学性能比改性前有了大幅度的提高,同时耐水性能也比其他不同软段的聚氨酯弹性体材料要好。 相似文献
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复合材料点阵结构以其优异的力学性能越来越受到人们的广泛关注,文中在点阵结构的基础上,提出了直柱型点阵结构填充聚氨酯材料的新型复合夹层板结构,利用有限元软件ANSYS研究其静态力学性能.分别研究了夹心层高度、面板厚度等变化对其刚度性能的影响,并将该结构与实体板、普通聚氨酯夹层板进行对比,得出对工程实际具有一定参考价值的结论. 相似文献
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介绍随着新材料和新技术的进步,应用于航标系统的一种弹性体材料的灯桩,并简述其应用前景。弹性体材料灯桩的主要特征是便于施工和维护。 相似文献
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《舰船科学技术》2017,(15)
The vibration isolation performances of typical hull structure with viscoelastic interlayer are analyzed according to wave theory,and the influences of interlayer Young’s modulus and length on the vibration reduction are discussed.The theoretical analysis shows that combination of polyurethane interlayer with blocking mass can enhance the vibration isolation performance and expand isolation frequency band.In order to verify the effectiveness of polyurethane interlayer,the model test of power cabin’s vibration is carried out.The test data shows that the reduction of 20–1 000 Hz variation acoustic level at hull shell is more than 5 dB. 相似文献
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The vibration isolation performances of typical hull structure with viscoelastic interlayer are analyzed ac-cording to wave theory, and the influences of interlayer Young's modulus and length on the vibration reduction are dis-cussed. The theoretical analysis shows that combination of polyurethane interlayer with blocking mass can enhance the vibra-tion isolation performance and expand isolation frequency band. In order to verify the effectiveness of polyurethane interlay-er, the model test of power cabin's vibration is carried out. The test data shows that the reduction of 20–1000 Hz variation acoustic level at hull shell is more than 5 dB. 相似文献
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