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聚氨酯密封胶国外研究进展 总被引:4,自引:0,他引:4
介绍了国外在提高聚氨酯密封胶固化性、粘接性、弹性及耐候性等性能方面的研究成果 ,内容涉及单组分湿固化密封胶 (含硅烷改性单组分胶 )及普通双组分密封胶、含多硫化物的双组分聚氨酯密封胶 相似文献
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有机硅改性单组分聚氨酯密封胶的研制及力学性能研究 总被引:1,自引:1,他引:1
本文研究了聚氨酯密封胶的预聚体、填料、有机硅等因素对密封胶拉伸强度,伸长率、硬度等力学性能的影响。发现分子结构不同的预聚体与性质不同的填料对其力学性能的影响不同。填料炭黑的补强作用特别强。 相似文献
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Polyurethanes (PUs) are among the most widely used polymers with various applications in several industries. Antibacterial activity is an important feature of PU materials used in medical or many other related consumer products. They can, however, be easily colonized by bacteria and fungi, which may cause many problems for human health. It is therefore very important to enhance the antimicrobial properties of PUs, besides improving their chemical and physical properties. The incorporation of some antibacterial materials in the PUs' polymeric matrices is an effective strategy to improve their antibacterial activity. In this regard, the addition of some materials including Ag, Au, ZnO, and TiO2 nanoparticles, carbon nanotubes and chitosan to the PUs' material structure is reviewed in this article, and their antibacterial mechanisms are discussed. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019 , 136, 46997. 相似文献
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双液型遇水膨胀聚氨酯密封胶的研制 总被引:1,自引:0,他引:1
介绍了双液型遇水膨胀聚氨酯密封胶的研究。该密封胶以水溶性聚氨酯预聚体为A组分,复合固化剂、填料和增塑剂为B组分,具有遇水膨胀的特殊功能。重点讨论了填料用量、增塑剂用量、固化剂形态对密封胶性能的影响。 相似文献