共查询到18条相似文献,搜索用时 203 毫秒
1.
硅烷偶联剂的界面性能研究及机理探讨 总被引:13,自引:0,他引:13
采用红外光谱表征了硅烷偶联剂的结构;并用硅烷偶联剂预处理金属(铝)、玻璃纤维表面,然后用硅橡胶胶粘剂粘接金属与金属的界面,用玻璃纤维增强不饱和树脂,测定其粘接剪切强度及拉伸强度。试验结果表明:经过硅烷偶联剂预处理后,不论是金属界面间粘接剪切强度,还是玻璃纤维增强不饱和树脂的拉伸强度均有明显提高。并用硅烷偶联剂的结构、反应机理分析讨论试验结果。 相似文献
2.
3.
4.
众所周知,全隐玻璃幕墙的玻璃是靠胶与金属框架粘接,玻璃可否长期安全地粘结在金属框架上,除与设计和施工方法有关外,很大程度上取决于胶的特性,一旦胶的特性发生变化,就会影响玻璃的安全。 为解决这一问题,天津广电国际新闻中心玻璃幕工程采用了全隐玻璃幕墙玻璃与金属框架连接的做法,有效地保证了玻璃幕墙的安全。 1 全隐玻璃幕墙用胶 目前,全隐玻璃幕墙常用的材料为玻璃、铝合 相似文献
5.
6.
美国(GE)公司的SCS—1000是一种单组份室温硫化的硅橡胶密封剂,它作为一般镶嵌用密封剂具有弹性和良好的粘结力。这种密封剂对玻璃及普通金属均具有特别好的粘结性能,而且有较好的耐候性,可以在任何气候和温度环境中使用。均不会降低或破坏其密封性能。SCS—1000的基本用途是玻璃,塑料和金属的粘结密封,大型玻璃橱窗接缝处的镶嵌密封,还可用在诸如金属板、天窗、通风装置 相似文献
7.
纤维素醚和可再分散聚合物胶粉为聚苯板粘结砂浆提供了重要的功能。外墙外保温体系"墙-粘结砂浆-聚苯板"中最关键的是粘结砂浆与聚苯板之间的粘结。一种特殊改性的聚苯板粘结型纤维素醚Bermocoll PAD 1,特别适用于EPS外墙外保温系统的粘结砂浆。Bermocoll PAD 1除具有纤维素醚的所有功能外还可提高砂浆与聚苯板间的粘接强度。即使在低掺量的情况下,它不仅能提高新拌砂浆的保水性和工作性,同时由于独特的锚固技术还可以显著提高砂浆与聚苯板之间的原粘接强度和耐水粘接强度。 相似文献
8.
单组分RTV硅橡胶与PMMA粘结性能的研究 总被引:1,自引:0,他引:1
研究了采用丙烯酸混合单体改性硅油,预涂底胶和改善填料处理工艺等方法对单组分RTV硅橡胶与PMMA间粘结性能的影响.研究结果表明:通过用丙烯酸类混合单体改性硅油的方法,可以显著提高单组分RTV硅橡胶与PMMA间的粘结强度;当改性硅油含量为20%(质量分数,下同)且预涂正-氯丙基三甲氧基硅烷底胶时,单组分RTV硅橡胶与PMMA间的粘结强度可以达到0.86 MPa;当掺加9%疏水型SiO2并预涂正-氯丙基三甲氧基硅烷底胶时,则掺5?MA改性单组分RTV硅橡胶与PMMA间的粘结强度达到0.8 MPa. 相似文献
9.
±800kV瓷芯支柱复合绝缘子硅橡胶及粘接工艺的研究 总被引:1,自引:0,他引:1
对±800kV瓷芯支柱复合绝缘子用硅橡胶进行了研究,为保证硅橡胶在注射硫化过程中与瓷芯棒粘接牢固,且不能产生气隙,选用110-2甲基乙烯基硅橡胶,分子量为630000~650 000。不同配方硅橡胶与瓷芯棒的粘接强度、耐漏电起痕和电蚀损性能对比试验结果表明:在配方中添加少量的复合阻燃剂,可以使硅橡胶护套伞裙材料的直流电压下耐漏电起痕和电蚀损性达到1A4.5级。确定了硅橡胶的混炼工艺和配合体系以及粘接剂的制备方法,并对瓷芯棒与硅橡胶的粘合进行了对比实验,确定了粘合工艺和硫化工艺。生产出的瓷芯支柱复合绝缘子的产品性能达到要求。 相似文献
10.
11.
12.
13.
14.
15.
16.
Anneliese Hagl 《Stahlbau》2008,77(11):791-801
Sizing of structural silicone bondings. Beside the up to now in detail investigated bonding of line‐type extension – e.g. with respect to the application case of glass facades the U‐type bonding geometry which has been chosen for the Herz‐Jesu church – point‐type bonding geometries are of interest for realisation as well. Concerning the term point‐type, not only bonded point supports are considered here but also U‐type, T‐type or flat bonding geometries of short length which are applied as discrete load introduction points on or in glass edges or glass surfaces. It is common to all these bonding applications that the free surfaces allow a significant lateral contraction affecting obviously the load bearing capabilities and properties. Based on experimental results of the research project “Geklebte Verbindungen im Glasbau (Bonded joints in glass constructions)” of the University of Applied Sciences Munich, the functionality and the potential sizing procedures of point‐type bonding geometries will be presented in this report in the context of subsequent theoretical studies. 相似文献
17.
采用电子万能试验机、极限氧指数、垂直燃烧仪、同步热分析仪和锥形量热仪等,系统研究了白炭黑添加量对硅橡胶/白炭黑复合材料的力学性能、阻燃性能、热稳定性和燃烧性能的影响。结果表明:白炭黑能显著提高复合材料的力学性能,白炭黑添加40 份时,复合材料力学性能达到最佳,其拉伸强度为9.35MPa,断裂伸长率为614.7%;白炭黑能改善复合材料的阻燃性能,白炭黑量达到50 份时,复合材料极限氧指数可达25.0%;白炭黑添加能明显提高复合材料的初始热分解温度和高温成炭率,白炭黑添加量为40 份时初始热分解温度为495.4 ℃,高温残炭率为31.4%;白炭黑的添加能有效降低复合材料的热释放速率、总热释放量、总生烟量和二氧化碳生成量,对硅橡胶有较好的阻燃抑烟作用。 相似文献
18.
Anneliese Hagl 《Stahlbau》2006,75(6):508-520
The Innovation – Bonding. Essential motivation for establishing the workgroup “Bonding” was that silicone bondings – in the structural engineering well known – received a great importance in the past years regarding application for structural glazing. Long times the application of silicones was only the usage in weather sealings and for sealings of insulated glass units. Due to the special properties of silicone this material has certainly the potential, in addition to the weather seal purpose, to take over also load bearing functions. The European Technical Guideline ETAG002 regulates actually the constructive requirements of line shaped silicone bondings. Nevertheless the knowledge of the real parameters of the pure material and its mechanical properties is very limited. This is the reason, that for using a silicone bonding, planned by engineering principles, experiments are necessary in wide areas. Reliable parameters and material properties are widely unknown, thus the sizing of a general bonding geometry with using Finite Element Analysis is unsatisfactory. The ETAG test specimen for tension is moreover unsuitable for retrieving direct material properties, due to edge effects leading to stress concentrations within the specimen. Therefore getting real parameters of the silicone material out of this kind of tests is nearly impossible. In the working group focus has been given on the development of theoretical models for the material silicone by a combined approach of experiment (material tests) and theory (analysis by FEM). Main objective is the establishment of design criteria for complex bonding geometries by application of engineering principles in the area of structural glazing. Based on the gained experience it will be possible in future: – to design arbitrary bonding geometries – to optimise them with respect to the most possible failure mechanism – to use simple formula and criteria for the design of arbitrary kinds of bondings – to limit extensive testing for each application. Extending the existing work program, it is envisaged in the short term to analyse bonding systems by duromer adhesives (e.g. acrylate, polyurethane). 相似文献