共查询到19条相似文献,搜索用时 93 毫秒
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介绍硅烷偶联剂在橡胶工业中的应用研究进展,展望橡胶用硅烷偶联剂的发展趋势和应用前景。硅烷偶联剂的使用大大提高了橡胶制品的综合性能,促进了无机填料在橡胶工业中的应用。目前橡胶用硅烷偶联剂主要种类为含硫烃基类、乙烯基类、甲基丙烯酰氧烷基类、氨烃基类和环氧烃基类。随着新型轮胎和橡胶制品的快速发展,市场对橡胶用硅烷偶联剂的性能和使用技术也提出更高的要求,尤其是轮胎绿色化进程的加快,对硅烷偶联剂的需求快速增长,以NXT为代表的新型硅烷偶联剂是未来橡胶用硅烷偶联剂的发展方向之一。 相似文献
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硅烷偶联剂的性能与应用 总被引:7,自引:0,他引:7
硅烷偶联剂是一种能够增强无机填料与树脂之间界面结合力的化学物质,在塑料的填充改性中具有十分重要的作用。介绍了硅烷偶联剂的品种、结构和性能及新型硅烷偶联剂的开发情况。论述了硅烷偶联剂的作用机理和使用方法,并对其在填充复合材料中的应用效果进行了讨论。 相似文献
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介绍了在填充白炭黑的轮胎胎面胶中使用NXT硅烷偶联剂的情况和NXT硅烷偶联剂给白炭黑胎面胶带来优异的加工性能和性能。 相似文献
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利用硅烷偶联剂KH560对木粉/聚乙烯复合材料进行表面处理以改善其胶接性能。利用接触角、吸水量、表面形貌以及胶接强度测试等分析方法,研究了硅烷偶联剂处理聚乙烯木塑复合材料胶接接头在水环境中的胶接耐久性能。试验结果表明,机械打磨并偶联剂处理后,聚乙烯木塑复合材表面接触角增加,表面粗糙度增大,胶接强度和耐水性明显提高。偶联剂分子链上环氧基团的"架桥"作用以及甲氧基的憎水作用,是粘接强度和耐水性能提高的主要原因。浸水环境下,聚乙烯木塑复合材料表面粗糙度略有降低;随着浸水时间的延长,表面接触角下降,胶接接头的吸水量增加,胶接强度下降。水环境下聚乙烯木塑复合材料中木质纤维成分的吸水膨胀,是造成胶接强度下降的主要原因。 相似文献
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采用无卤型丙烯酸树脂和环保型增塑剂及分散剂制备低温速固化的无卤塑溶胶。考查了增塑剂和分散剂用量对塑溶胶黏度、固化物强度的影响,不同固化温度和时间对强度的影响。结果表明,增塑剂含量越多,体系的黏度越小,固化物越软。适量的分散剂可以降低塑溶胶体系的黏度而不影响固化物强度。硅烷偶联剂的使用可以提高塑溶胶对基材的附着力。 相似文献
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选用钛酸酯偶联剂NDZ101、NDZ401和硅烷偶联剂KH550、KH570分别对碱式硫酸镁晶须进行预处理,采用模压工艺制备不饱和聚酯树脂/苎麻布/碱式硫酸镁晶须复合材料,研究了偶联剂加入比例对复合材料力学性能的影响。结果表明:除了KH570外,其他几种偶联剂均可保持或提高复合材料的拉伸强度和冲击强度;除了NDZ101之外,其他几种偶联剂均可提高复合材料的弯曲强度,当选用2%的KH550进行处理时,复合材料的弯曲强度最高,达到104.78 MPa,较未经偶联剂处理的复合材料的弯曲强度(95.18 MPa)提高了10.09%;利用硅烷类偶联剂处理晶须,对复合材料的拉伸模量、弯曲模量的改善效果优于钛酸酯类偶联剂;偶联剂处理不能改变复合材料脆性断裂的性质。 相似文献
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大分子偶联剂对PE/氢氧化铝阻燃复合材料性能的影响 总被引:18,自引:0,他引:18
研究了用小分子硅烷偶联剂及所合成的大分子偶联剂表面改性的氢氧化铝(ATH)对其填充的聚乙烯阻燃复合材料性能的影响,并对拉伸之后的复合材料的微观形态进行了表征。研究发现,大分子偶联剂对阻燃材料的力学性能的改善效果比小分子偶联剂要好,同时大分子偶联剂还提高了材料的热稳定性。 相似文献
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Green biocomposites were prepared via injection molding with poly(hydroxybutyrate-co-valerate) and natural bamboo fibers. Three types of coupling agents were used to modify the fibers, and the influence of different kinds of coupling agents was evaluated. The mechanical properties of the biocomposites varied with the type and content of the coupling agents. The water absorption and thermal properties of the composites were measured simultaneously after treatment with the coupling agents. Fourier transform infrared spectroscopy was employed to analyze the principle of fiber treatment with different coupling agents. The mechanical properties of the composites markedly improved, whereas the water absorption decreased after modification. Treatment with coupling agents only slightly influences the thermal properties but improved the crystallinity of the composites. Therefore, the interfacial compatibility between the fiber and matrix was enhanced after modification, with the silane coupling agent exhibiting the best effect. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019 , 136, 47533. 相似文献
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An investigation has been carried out for determining the effect of coupling agents on the mechanical properties of polymer-impregnated mortars. Mortar specimens were impregnated with methyl methacrylate (MMA) monomer and α, α-azobis-isobutyronitrile initiator, and polymerized thermally in water. Three titanate coupling agents, KR-33CS, KR-55, and KR-138s, and one silane coupling agent, the A-174, were used for the investigation. Varying amounts of coupling agent were used in impregnating the mortars in situ or in pretreating the mortars with a solvent system. Bulk polymerization of MMA shows no appreciable influence of the coupling agents in the reaction kinetics; however, with the exception of KR-138S, all polymers obtained in the presence of coupling agents came out as insolble. Similar results were obtained for polymers extracted with acetone from mortars. The mechanical property results show an improvement of properties in mortars containing 5.0 vol% of KR-33CS and A-174 after impregnation in situ. A slightly better improvements of mechanical properties were obtained by pretreating the mortar specimens with acetone or toluene/xylene containing coupling agents. Microscopic observation of the fracture surface showed no noticeable difference in the surfaces prepared with and without coupling agents. 相似文献