共查询到20条相似文献,搜索用时 156 毫秒
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随着科学技术的不断发展,胶粘剂的性能得到了较大的提升,在各行各业中有着重要的作用,应用非常广泛。粘接性能作为胶粘剂最为重要的一个方面,直接影响着胶粘剂的优劣。在不同的环境中需要使用不同的胶粘剂,即环境因素可以影响到胶粘剂的粘接性能,所以在选择胶粘剂时需要考虑到环境因素。本文将主要研究环境因素对胶粘剂粘接性能的影响,环境因素中温度和湿度是影响较为明显两个点,所以文章通过实验研究的方式,选择环氧树脂胶粘剂作为研究对象,在不同的温度和湿度环境下进行实验研究。实验结果表明温度和湿度过高或者过低都会降低胶粘剂的粘接性能;当胶粘剂长时间处于较为恶劣的温度和湿度环境中时,其粘接性能会随着时间的延长而降低。 相似文献
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为了提高聚氨酯胶粘剂粘接三元乙丙非极性橡胶材料的粘接强度,在三元乙丙橡胶配方中添加石油树脂和聚丁烯作增粘剂。测试了新配方产品的力学性能和与聚氨酯胶粘剂的粘接强度。结果表明,聚丁烯和石油树脂都可以提高PU胶对EPDM的粘接性能,但是聚丁烯对EPDM的力学性能有一定的影响。当在每百份EPDM中添加15份石油树脂,可使之保持良好的力学性能,其与PU胶粘剂的粘接性能亦获得了改善。 相似文献
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表面处理对硅橡胶胶粘剂胶接性能的影响 总被引:9,自引:0,他引:9
本文着重研究了不同表面处理条件下硅橡胶胶粘剂的粘接性能。有机硅烷偶联剂对提高硅橡胶胶粘剂的粘接性能有显著效果,其中以GPJ-43的处理效果为最佳。铝合金试样机械打磨后采用不同溶剂清洗对粘接性能也有影响,其中以三氯乙烯的效果为最好。磷酸阳极化是很有效的表现处理方法。对铝-铝粘接界面的分析发现,硅橡胶胶粘剂粘接接头的破坏一般为胶粘剂的内聚破坏或胶粘剂与偶联剂界面的粘附破坏。 相似文献
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采用水性环氧树脂乳液作为基料,水性改性胺作为固化剂以及环保型助剂等配制成双组分水性环氧防锈底漆。讨论了水性环氧固化剂、活性防锈颜料、流变剂及活性稀释剂对水性环氧防锈底漆性能的影响。 相似文献
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The durability properties of bonded lap shear joints made from an epoxy/dicyandiamide adhesive and zinc, zinc-coated steel, two different aluminium alloys or cold-rolled steel metal coupons have been investigated. The influence of the dicyandiamide content of the adhesive on the durability properties-has been assessed by salt spray testing or by storing the joints in water at 70°C or 90°C for periods of time up to five weeks. The degradation products formed during ageing of the epoxy adhesive in water have been investigated using high performance liquid chromatography (HPLC) and diffuse reflectance infrared Fourier transform spectroscopy (DRIFT). The degradation mechanisms of aluminium/epoxy bonded joints have been thoroughly studied using X-ray photoelectron spectroscopy.
The performances of the bonded joints under a pure corrosive environment have been found to be little influenced by the quantity of dicyandiamide in the adhesive. When the bonded joints were aged in hot water, the stability of the interface toward an excess of dicyandiamide directly followed the sensitivity of the oxide layer at high pH values. Optimal durability properties without peel strength losses of the adhesive were aehieved both with zinc and aluminium-coated substrates by reducing the quantity of dicyandiamide in the epoxy adhesive by 20% (the initial dicyandiamide content in the commercial adhesive being ca. 9%, with respect to the epoxy resin). 相似文献
The performances of the bonded joints under a pure corrosive environment have been found to be little influenced by the quantity of dicyandiamide in the adhesive. When the bonded joints were aged in hot water, the stability of the interface toward an excess of dicyandiamide directly followed the sensitivity of the oxide layer at high pH values. Optimal durability properties without peel strength losses of the adhesive were aehieved both with zinc and aluminium-coated substrates by reducing the quantity of dicyandiamide in the epoxy adhesive by 20% (the initial dicyandiamide content in the commercial adhesive being ca. 9%, with respect to the epoxy resin). 相似文献
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注射成型钕铁硼塑料粘结磁体的研究 总被引:2,自引:0,他引:2
对快淬钕铁硼(NdFeB)磁粉进行包覆,并用硅烷偶联剂KH550进行表面处理,以尼龙12作粘结剂.添加复配润滑剂及抗氧剂,在保证磁性能即高磁粉含量(91%)的条件下,很好地解决了复合体系流动性差及磁体在湿热环境下易氧化生锈的问题。并研究了注射成型NdFeB塑料粘结磁体的制备工艺、磁粉表面处理、磁粉含量、添加剂等因素对磁性能、加工性及力学性能的影响,制得了具有较好综合性能的NdFeB塑料粘结磁体,该产品在国内已获得应用。 相似文献
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