共查询到16条相似文献,搜索用时 97 毫秒
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以纳米SiOx取代6109硅橡胶用料沉淀法白炭黑,采用传统的硅橡胶混炼方法进行纳米SiOx在其中的分散,可使6109硅橡胶在其它性能数据变化不大的情况下.拉伸强度由原来的4.5MPa提高到6.7MPa,即提高55%。 相似文献
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硅橡胶的物理改性研究进展 总被引:4,自引:1,他引:3
硅橡胶是一类以聚硅氧烷为主链的高分子材料,它具有优异的耐热性、耐寒性和电绝缘性,广泛应用于社会各种行业。但硅橡胶存在分子极性低,疏水性强,物理性能较差等缺陷,其改性研究受到广泛关注。本文主要综述了近年来硅橡胶与氟橡胶(FPM)、三元乙丙橡胶(EPDM)、聚氨酯橡胶(PU)、乙烯乙酸乙烯橡胶(EVM)、乙烯乙酸乙烯酯共聚物(EVA)和乙烯(PE)等共混改性的发展状况,以及矿物微粉与纳米粒子填充改性硅橡胶的研究进展,并比较了各种方法之间的优缺点,最后对目前存在的问题与未来的发展方向提出了一些看法。 相似文献
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Fire-resistant ceramifiable silicone rubber composites with excellent comprehensive property were prepared in this paper. Silicone rubber was used as the base polymer, aluminum hydroxide, magnesium hydroxide, zinc borate, and glass frits were additives. The flammability and thermal stability properties, essentially focusing on the use of the limiting oxygen index and thermogravimetric analysis, were all studied. Besides, the ceramic residues were also studied by mechanical testing, scanning electron microscopy, and X-ray diffraction. The ceramifying silicone rubber could achieve a limiting oxygen index value of 34.8%, and the flexural strength of ceramic residues formed at 800°C was 9.7 MPa. The residue of composites was approximately 58.6% at 700°C, which is significantly higher than that of neat silicone rubber. The scanning electron microscopy analysis depicted that a dense structure was formed as formed. 相似文献
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有机硅树脂合成及其共混改性研究 总被引:4,自引:0,他引:4
通过实验筛选出合成有机硅树脂的配方,讨论了原料配比、水解温度,介质酸度和溶剂组成对有机硅树脂的影响。采用傅里叶变换红外光谱表征了聚甲基丙烯酸丁酯(PBMA)共混改性有机硅树脂前后的结构特征;采用扫描电子显微镜分析了有机硅树脂、PBMA和PBMA共混改性有机硅树脂的微观结构,进而探讨,改性有机硅树脂室温同化机理,即有机硅树脂分子和PBMA分子之间的互相介入、互相贯穿使之形成网络,具有了自由基协同效应。 相似文献