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Polymer/steel sandwiches are able to reduce the nuisance due to vibrations and noise in automotive applications, for example. Thin layers of polymer are inserted between two metal sheets. The deformation of the polymer is responsible for the damping properties of the sandwiches and, therefore, the viscoelastic behavior of the polymer is of major importance. However, adhesion between the two materials is also required. The polymer studied in the present work is a copolymer of ethylene and vinyl acetate (EVA) containing 28 wt% of vinyl acetate grafted with maleic anhydride (1 wt%). A wedge test is used to measure the interfacial strength and the durability of the adhesive bond. The influence of the surface treatment of the steel substrate on the adhesive behavior and the effect of water has been studied. FTIR surface analysis after cleavage helped us to identify the nature of the interfacial bonds. 相似文献
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Polymer/steel sandwiches are able to reduce the nuisance due to vibrations and noise in automotive applications, for example. Thin layers of polymer are inserted between two metal sheets. The deformation of the polymer is responsible for the damping properties of the sandwiches and, therefore, the viscoelastic behavior of the polymer is of major importance. However, adhesion between the two materials is also required. The polymer studied in the present work is a copolymer of ethylene and vinyl acetate (EVA) containing 28 wt% of vinyl acetate grafted with maleic anhydride (1 wt%). A wedge test is used to measure the interfacial strength and the durability of the adhesive bond. The influence of the surface treatment of the steel substrate on the adhesive behavior and the effect of water has been studied. FTIR surface analysis after cleavage helped us to identify the nature of the interfacial bonds. 相似文献
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分析了影响子午线轮胎用钢丝帘线与橡胶粘合性能的主要因素,其中包括钢线帘线的镀层组分及厚度、结构、表面状态、操作、包装贮存条件以及子午线轮胎的结构和胶料配方设计及生产工艺等因素。 相似文献
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Florence Avril Roland Rahmé Marjolaine Doux Didier Verchere Daniel Sage Philippe Cassagnau 《大分子材料与工程》2013,298(6):644-652
The present works aims to develop multi‐materials such as steel/polymer/steel hybrid system for weight savings in automotive industries. This laminate must be compatible with processing on the industrial line (steel/polymer lamination under 200 °C) and the structure must be flow‐resistant during the paint process curing (200 °C for 30 min). Consequently, a yield stress polymer system based on compatibilized PA11/copolymer of ethylene and octene blends has been developed. The yield stress property (for T > 200 °C) depends on the phase concentration and compatibilization strategy. It is observed that an annealing process (heating treatment for 1 h at 200 °C), simulating the painting process, provides a strong benefit for the polymer/steel properties after aging under humidity conditions.
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《Journal of Adhesion Science and Technology》2013,27(22):2531-2541
Abstract Micropatterning of surfaces has been demonstrated using composite polymer coatings of PS and PMMA of equal molecular weights in different volume proportions with varying surface topographies on silicon surfaces. The creation of PMMA masks with various surface morphological features has also been demonstrated by removal of PS from the composite coatings using cyclohexane. Atomic force microscopy (AFM) investigations revealed that the surface pattern and the dimensions of these masks significantly changed with the change in the volume proportions of each homopolymer. The composite coatings of 20/80 vol% PS/PMMA, 50/50 vol% PS/PMMA, and 80/20 vol% PS/PMMA resulted in PMMA masks with holes (depth ~300 nm), wrinkles (height ~350 nm) and pillars (height ~600 nm), respectively. Surface compositional analysis carried out using FTIR and XPS investigations confirmed the presence of polymer coatings of PS, PMMA and PS/PMMA. XPS investigations also confirmed the successful removal of PS from the PMMA mask by showing the presence of the silicon substrate on those masks where PS was previously present. The water contact angle of the composite polymer masks ranged from 70 to 90° which increased with the increase of PS vol% in the composite. The wetting behavior of certain PMMA masks showed hydrophobicity with water contact angle values above 90°. 相似文献
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采用正交设计法和对比试验法,考察了硫黄、氧化锌、促进剂、炭黑以及某些工艺条件对胶料与镀铜钢丝帘线粘合力的影响。结果表明,硫黄品种对粘合力的影响不大;氧化锌用量增大,粘合力增大;用1.0份促进剂CZ时的粘合力大于用1.3份促进剂DZ;使用高结构炭黑可增大粘合力;胶料的混炼方法和硫化时间对粘合力的影响较大。 相似文献
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A phenomenological model based on the Takayanagi approach is proposed to describe the adhesion of polymer blends to a solid support. The model consists of three elements corresponding to two components of the blend and a solid surface. The conditions for failure of the adhesion joints at the interface between the solid surface and the polymer blend are found to depend on the blend composition and the moduli and adhesion joint strength of each component to the solid. 相似文献
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A phenomenological model based on the Takayanagi approach is proposed to describe the adhesion of polymer blends to a solid support. The model consists of three elements corresponding to two components of the blend and a solid surface. The conditions for failure of the adhesion joints at the interface between the solid surface and the polymer blend are found to depend on the blend composition and the moduli and adhesion joint strength of each component to the solid. 相似文献
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Phenolic and quinonoid compounds are widely studied in biological sciences because of their ability to chelate heavy metals like iron and copper and recently have found new applications in synthetic macromolecules. Amino-p-benzoquinone polymers, poly[(2,5-hexamethylenediamino)-1,4-benzoquinone] and poly{[2,5-(2,2′-bistrifluoromethyl)-4,4′-biphenylenediamino]1,4-benzoquinone} were synthesized and evaluated as adhesion promoters for steel/epoxy joints. An improvement in the torsional shear strength of these joints was observed when these polymers were used as adhesion promoters. The durability of the adhesive bond was also improved after boiling water treatment, relative to untreated and silane-treated joints. The improvement in adhesion could be attributed to the formation of a chelate between the polyaminoquinone (PAQ) and the iron surface and a chemical reaction between the PAQ and the epoxy resin. A low molecular weight model compound, bis[2,5-(4-methylanilido)]-1,4-benzoquinone, was also used to study coupling between the epoxy adhesive and the steel surface. Electron spin resonance (ESR), atomic absorption spectroscopy and infrared spectroscopy were used to document the epoxy-coupling agent reaction and the chelate formation. 相似文献
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对硼酰化钴MC23(钴质量分数为23%)用量(06~16份)对橡胶与钢丝帘线粘合性能的影响进行研究。采用的基本配方为:NR1000;炭黑N326620;芳烃油80;氧化锌90;硬脂酸05;防老剂402020;不溶性硫黄IS702060;促进剂DZ10;粘合剂RS35;粘合剂A23;沉淀法白炭黑50。结果表明,随着钴盐用量的增大,在未老化、热空气老化及盐水老化条件下,胶料与钢丝的粘合强度有所提高;在湿热老化条件下,粘合强度由于热量和湿气的交互作用而发生较大幅度的下降,但钴盐用量在10份时粘合强度的下降为最小。综合胶料初始和老化后的应力应变性能和粘合强度,以10份钴盐用量为最佳。 相似文献
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环氧粉末涂层对金属基材附着力的影响因素 总被引:1,自引:0,他引:1
环氧粉末涂料具有附着力好、耐腐蚀性强、耐温性能好等优点,在金属防腐特别是重防腐领域应用非常广泛。在环氧粉末涂层的诸多性能中,涂层对基材的附着力是非常重要的一项技术指标,也是满足其他性能的基础,附着力的好坏直接影响着涂层对基材的保护寿命。本文主要从喷涂温度、基材表面处理的表面粗糙度以及粉末涂料原材料等方面讨论了环氧涂层对金属基材表面附着力的影响因素。研究表明:喷涂温度提高有利于涂层附着力的提高,表面粗糙度提高且锚纹深度相对均匀有利于涂层附着力的提高,填料以及助剂的种类对附着力具有一定的影响。 相似文献