共查询到19条相似文献,搜索用时 109 毫秒
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合成二氧化硅对硅橡胶性能的影响 总被引:5,自引:0,他引:5
介绍了合成二氧化硅及硅橡胶的结构性质,探究了二氧化硅的结构性质对硅橡胶补强性能的影响,指出了二氧化硅颗粒的大小、形态、聚结状态、表面性质和与高分子硅氧烷之间的相互作用是影响二氧化硅对硅橡胶补强性能的最主要的因素,并用实验对硅橡胶的硬度、拉伸强度、300%定伸应力、扯断伸长率、撕裂强度、压缩永久变形等物理性能进行测定,结果表明:BET比表面积180~200m^2/g,孔隙度(吸油量)为3.0~3.2mL/g,平均粒径为8~10岬的沉淀法白炭黑对硅橡胶具有很好的补强效果。 相似文献
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一、应用介绍
高温硫化硅橡胶以其良好的憎水性和憎水迁移特性,优异的耐气候老化特性被广泛应用于复合绝缘子伞套的生产。但硅橡胶本身的强度非常低,需经气相法白炭黑补强,补强后其强度能提高40倍,可满足复合绝缘子行业对硅橡胶机械性能的要求。 相似文献
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国内硅橡胶泡沫材料的研究进展 总被引:2,自引:0,他引:2
综述了近年来硅橡胶泡沫材料的研究进展,重点从硅橡胶的补强和硅橡胶泡沫材料的硫化与发泡的特殊配合体系两个方面介绍了硅橡胶泡沫材料制备的特殊性。并指出高温硫化硅橡胶泡沫的研究将成为未来发泡硅橡胶材料的发展方向之一。 相似文献
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滑石—硅灰石复合矿物填充剂应用于硅橡胶 总被引:5,自引:1,他引:4
硅灰石等天然矿物通过超细粉碎和表面改性制成了性能较好的硅橡胶补强填充剂,探讨了没的粒长、偶联剂以及复合填充剂地硅橡胶力学性能的影响,制成的硅橡胶补强填充剂可部分取代白炭黑。 相似文献
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水玻璃有机衍生物在橡胶中的应用 总被引:3,自引:1,他引:2
综述了利用水玻璃为原料制备各种有机硅衍生物的方法及其对SBR和NBR硫化胶的补强作用,并提出了一条开发含硅新弹性体材料的实用途径。 相似文献
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硅橡胶在TTE-V150S型橡胶注射机上的应用 总被引:1,自引:0,他引:1
通过将东莞高能硅胶胶料和襄樊硅胶胶料在TTE—V150S型橡胶注射成型机上进行的应用试验,获得了最佳工艺条件,在此工艺条件下,所获得的硅橡胶电力绝缘子性能最佳,胶料最省。 相似文献
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Chomsri Siriwong Supparoek Boopasiri Vanichaya Jantarapibun Boonsong Kongsook Sirichai Pattanawanidchai Pongdhorn Sae‐Oui 《应用聚合物科学杂志》2018,135(13)
This work studied the properties of spent coffee ground (SCG) filled natural rubber (NR). The SCG was initially characterized by various techniques, prior to being added into rubber. Results revealed that SCG had relatively large particle size with very low specific surface area. It is mainly composed of organic compounds (such as protein, fatty acid, cellulose, hemicellulose, and lignin) with small quantity of inorganic substances (oxides of potassium, silicon, magnesium, calcium, and phosphorous). The incorporation of SCG in NR gave relatively low reinforcement and tended to retard vulcanization due to the presence of hydroxyl groups on the SCG surface. In addition to untreated SCG, reinforcement of SCG treated by liquid epoxidized natural rubber (LENR) and bis ‐ ( 3‐ triethoxysilylpropyl) tetrasulfide (TESPT) was investigated. Improvement of rubber properties was observed when SCG surface was treated. Overall, TESPT‐treated SCG gave the rubber with the highest mechanical properties, followed by LENR‐treated SCG and untreated SCG, respectively. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018 , 135, 46060. 相似文献
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以过氧化苯甲酰(BPO)为引发剂,使苯乙烯(St)在α,ω-羟基聚二甲基硅氧烷(PDMS)的甲苯溶液中进行自由基聚合制备PDMS/聚苯乙烯(PS)共混物,在甲基三乙氧基硅烷与PDMS的质量比为1∶1时,制得PS增强的室温硫化硅橡胶。研究了原料配比、BPO用量和甲苯用量对硅橡胶力学性能的影响,并对其微观结构进行了表征。结果表明,当PDMS/St(质量比)为60/40、BPO为PDMS质量的2.5%、甲苯/PDMS(质量比)为2时,所得硅橡胶的拉伸强度可达到3.8 MPa,PS的增强效果明显;该室温硫化硅橡胶具有微相分离结构,PS作为分散相分布于PDMS连续相中,且具有2个玻璃化转变温度。 相似文献
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对不同类型炭黑补强SBR拉伸强度的研究表明,炭黑补强SBR中存在着类似于橡胶增韧塑料的逾渗现象,由此提出橡胶补强临界间距的新概念,并讨论其影响因素.对于炭黑补强SBR体系,存在的一个最大临界粒径(原生粒子直径)为80 nm左右.提出了界面相互作用和最小补强粒子尺寸等橡胶补强设计上的新观点.通过计算机模拟,在分子水平上对橡胶和纳米颗粒间的界面相互作用进行了深入研究,结果表明即使在很强的界面作用(氢键范围)情况下,靠近颗粒表面的分子链仍然具有一定的活动性,在界面处能发生吸附脱附的过程.从热力学和动力学的角度阐述了在颗粒的表面不太可能形成橡胶玻璃化壳层. 相似文献
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溶剂在交联硅橡胶中无限稀释扩散系数测定 总被引:2,自引:0,他引:2
气相色谱法测定溶剂与聚合物材料之间的相互关系是一个快速、准确、方便的方法,为此利用气相色谱法测定了小分子溶剂在不同交联剂含量的交联硅橡胶中的无限稀释扩散系数,并研究了交联剂用量对无限稀释扩散系数的影响,这为研究交联硅橡胶特性提供了新方法。 相似文献
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Silicone rubber has good heat resistance, but its mechanical properties are poor. To improve the mechanical properties of the silicone rubber, the carbon fiber / silicone rubber composites were prepared in this paper, in which the silicone rubber was used as the matrix, the high-performance carbon fiber (CF) treated with coupling agent is used as the reinforcement. The best composite formulation, the types and content of coupling agent are determined by testing mechanical properties of the composites. The morphology structures of the composites were observed by scanning electron microscope (SEM), the compatibility between carbon fiber and silicone rubber was studied by infrared spectrum analysis (IR), dynamic thermal mechanical analysis (DMA) and X-ray photoelectron spectroscopy (XPS). The results show that the best composite formulation is silicone rubber of 100 phr, carbon fiber of 12 phr, coupling agent KH550 of 2.5 phr. The best first curing conditions are at 175 °C under 10 MPa for 30 min, the postcuring conditions are at 200 °C for 2h. The compatibility between carbon fiber treated with KH550 and silicon rubber is the best by SEM, IR, DMA and XPS analysis, and confirm that the coupling agent KH550 plays a compatilizer role in the preparation process of the carbon fiber/silicone rubber composites. 相似文献