接枝型橡胶压敏胶带的研究

橡胶接技时应选择合适的弹性体和单体。当m(NR)：m(SBR)：m(CR)＝100：(30～50)：(8～12)；m(MMA)：m(BA)：m(官能单体I 官能单体Ⅱ)＝100：(20～30)：(8～12)时，较易接技且接技反应易于控制。接技工艺条件应随橡胶配比的变化而变化。选定配方的工艺条件为：单体分2次投料，反应温度为80～85℃，反应时间为2h。用萜烯树脂与少量低软化点的石油树脂以质量比100：(30～50)复配后作为增粘树属县有较好的增粘效果；用A、B2种交联剂可获得较好的耐温、耐溶剂性。     

聚四氟乙烯薄膜压敏胶粘带的研制

主要介绍了聚四氟乙烯薄膜和有机硅压敏胶制造压敏胶粘带的方法。     

热敏型压敏胶带的研制

本热敏型压敏胶带的压敏胶以天然橡胶为主体，加入合成橡胶、增粘剂及其他助剂制成。胶带的基材是含有热敏剂的美纹纸。选用了一种比有机硅增粘剂交联温度低而且可以书写的高分子共聚物(100℃以下交联)作为防粘剂。确定了压敏胶的配方和胶带的生产工艺，并检测了各项性能。试验证明，该胶带在常温下无色，在高温时则会显示出标识、字迹或图案。在医学、科研等领域有广泛的用途。     

我国压敏胶粘带工业的现在与未来

介绍了我国压敏胶粘带工业及与之相关的原材料和设备等工业的现状；分析了制约我国胶粘带产业发展的因素，对我国压敏胶粘带产业发展的品种和方向提出观点。     

耐高温皱纹纸压敏胶带的研制

采用100份的天然橡胶为主要弹性体、加入20份丙烯酸酯橡胶（ACM）、3-5份ZnO,0.8-1份硬酯酸制得混炼胶，在适量甲苯溶解上述混炼胶并加入60-80份的萜烯树脂、6-9份的2402酚醛树脂、8-12份改性剂及适量防老剂制得耐温压敏胶。将该胶涂布在耐温的皱纹纸上制得皱纹纸胶带，其粘性佳、耐高温、保持力强、无残胶、可用于电容器等电子元件的“编带“及机动车辆“烤漆保护“等生产环节。     

我国压敏胶粘带的现状及发展

报道了我国压敏胶粘带的需用量、及应用市场。 1998年销售量 2 4.9亿m2 ,比上一年增长 3.75 %。包装用占份额48.5 % ,标签及印刷占 17.2 % ,医疗卫生用占 11.2 5 %。还介绍了压敏胶粘带的生产设备 ,基材 ,离型纸的技术现状 ,并提出正在或期待开发的项目     

中国压敏胶粘带标准的现状

介绍了中国压敏胶粘带标准的制定情况 ,并将中国压敏胶粘带测试方法的标准 (厚度、剥离粘合力、持粘性、初粘性以及拉伸性能的测试方法 )与ASTM、PSTC、AFERA、JIS和UL等标准组织的相应标准进行了比较 ,指出了它们之间存在的差异。对中国压敏胶粘带标准中存在的问题提出了改进建议     

MQ硅树脂及其压敏胶粘带的研究

用FT -IR、2 9Si-NMR和GPC对适用于合成硅酮压敏胶的自制MQ硅树脂进行了表征 ,研究了硅酮压敏胶的合成配比和工艺对PET压敏胶带“三物性的影响 ,并优选出最佳配比     

压敏胶基导热胶带及其应用

压敏胶基导热胶带的主要作用就是在提供粘接功能的同时,填充元器件与散热器接触面间的微观缝隙,降低界面热阻。介绍了导热胶带的结构和功能,以及相关的性能测试。同时简述了导热胶带对LED背光电视中灯条的粘接方案及其优点。     

Effect of cure rate of rubber compound on the adhesion to copper-plated steel cord

Copper-plated steel cord was prepared and its adhesion properties to rubber compounds, which have different loading amounts of both sulfur and accelerator, were examined in comparison with brass-plated steel cord. The lower pullout force of copper-plated steel cord to the rubber compounds was shown compared with brass-plated steel cord. The copper-plated steel cord showed higher adhesion retention to rubber compounds than brass-plated steel cord against various hostile environments. The stability against both humidity aging and thermal aging, and the cause for the high adhesion retention of the copper-plated steel cord to rubber compounds, were discussed compared with those of the brass-plated steel cord. The pullout force of copper-plated steel cord to rubber compound is inversely correlated with cure rate after various aging treatments.     

Adhesion enhancement of powder coatings on galvanised steel by addition of organo-modified silica particles

The addition of organo-modified silica particles (OSP) to organic monolayer coatings has been investigated as an alternative to the use of primers or surface pretreatments in galvanised steel substrates. A commercial additive consisting of trifunctional organosilane (alkyl-triethoxysilane) grafted on silica particles was directly incorporated at different concentrations (1, 2.5, 3.5 and 4.5 wt%) as an integral additive in a polyester powder coating. The OSP were characterised physicochemically by means of FTIR and TGA, and the coating formulated by DSC. The anticorrosive properties of the systems were evaluated by means of electrochemical impedance spectroscopy (EIS), showing improvements with all the formulations containing the OSP, especially in the coating with 2.5% OSP. In order to explain this behaviour, morphological (using SEM) and adhesion studies were done. The formation of agglomerates in the powder coatings was detected when the concentration was over 2.5%. There was an improvement in the adhesion of the coating to the substrate for all the samples containing the OSP but especially for that containing 2.5%. The impact resistance was increased too, especially in the formulations with 2.5% and 3.5%.     

Effect of surface nanocrystallization on corrosion and corrosion inhibition of low carbon steel: Synergistic effect of methionine and iodide ion

The corrosion properties of a nanocrystalline low carbon steel coating (SNCLCS) fabricated on a low carbon steel substrate by magnetron sputtering and the bulk steel (BLCS) were investigated in aerated 0.5 M H₂SO₄ solution by EIS and polarization techniques. The corrosion inhibiting effect of methionine and synergistic KI additives was also studied. The results show that both specimens underwent active corrosion with no transition to passivation in the potential range studied. Surface nanocrystallization was observed to increase the corrosion susceptibility of low carbon steel, leading to a decrease in interfacial impedance and an increase in the kinetics of the anodic reaction. Methionine inhibited the corrosion of both specimens with comparable inhibition efficiencies and iodide ions synergistically increased the inhibition efficiency. This synergistic effect was, however, more pronounced for BLCS. This has been discussed vis-à-vis the more positive surface charge on BLCS compared to SNCLCS.     

Effects of carbon nanotube content on adhesion strength and wear and corrosion resistance of epoxy composite coatings on AA2024-T3

The effects of multiwalled carbon nanotube (MWCNT) content on the adhesion strength and wear and corrosion resistance of the epoxy composite coatings prepared on aluminum alloy (AA) 2024-T3 substrates were evaluated using atomic force microscopy (AFM), blister test, ball-on-disk micro-tribological test and electrochemical impedance spectroscopy (EIS). The adhesion strength of the epoxy composite coatings improved with increasing MWCNT content. Increased MWCNT content also decreased the friction coefficient and increased the wear resistance of the epoxy composite coatings due to improved solid lubricating and rolling effects of the MWCNTs and the improved load bearing capacity of the composite coatings. Finally, EIS indicated that increased MWCNT content increased the coating pore resistance due to a decreased porosity density, which resulted in an increase in the total impedance of the coated samples.     

异氰酸酯底胶对压敏胶粘接性能的影响

了异氰酸酯底胶对于提高压敏胶粘接性能的影响,分别以单面和双面压敏胶带与钢、铝、铜、玻璃试片粘接,制备了剥离试样和拉剪试样,并分别测试了性能。结果发现,对于两种试样,异氰酸酯 胶均可大幅提高其粘接强度,适当延长涂底胶后的晾置时间,以及贴合后的放置时间有利于粘接性能的提高。     

Adhesion of carbon steel and natural rubber by functionalized silane coupling agents

This study characterized a method of adhesion between uncured natural rubber and carbon steels (CS) by the surface modification of the CS with silane coupling agents comprising amino, thiol, glycidoxy, and isocyanate organic functionality. The effects of the functionalization of the silane coupling agents on adhesion between CS and uncured natural rubber were investigated by X-ray photoelectron spectroscopy, Fourier transform infrared spectroscopy, atomic force microscopy, and local nanoscale thermal analysis. The reaction mechanism among the CS, silane coupling agent, and natural rubber was studied, revealing that adhesion was optimized and cohesive failure achieved when 3-(trimethoxysilyl)propylamine (APS) was used to modify the CS. The CS was shown to be directly silanized by the silane coupling agents, but the reactions between the natural rubber and the silane coupling agents was dependent on silane functionality.     

The influence of zinc surface pretreatment on the adhesion of epoxy coating electrodeposited on hot-dip galvanized steel

The adhesion and electrochemical properties of epoxy coatings electrodeposited on hot-dip galvanized steel with and without passive films were investigated during exposure to 3% NaCl. The passive films were formed in hot air, in boiling water and by chromating. Adhesion was measured both by a standardized pull-off method and by swelling in N-methyl pyrrolidone. Pretreatment of hot-dip galvanized steel with passive film formed in hot air increases both dry and wet adhesion strength of the epoxy coating compared to pretreatment with passive film formed in boiling water and chromate coating. The overall increase of wet adhesion for this sample was maintained throughout the whole investigated time period. It was shown that the change in adhesion of epoxy coating on a chromate coating is smallest of all investigated samples, although the initial value of adhesion on this surface had the lowest value. The corrosion stability of coated Zn samples pretreated by different methods, was investigated by electrochemical impedance spectroscopy and in the initial time of exposure to NaCl the highest values of pore resistance were also obtained for the epoxy coating on Zn pretreated in hot air, whereas the epoxy coating on a HDG steel with a chromate coating showed the smallest change in electrochemical properties (pore resistance, coating capacitance, charge-transfer resistance) during prolonged exposure time.     

Solventborne paint systems on carbon steel and hot-dip galvanized steel for a wide range of atmospheric exposures

The paper analyzes the performance of solventborne paint systems applied on carbon steel and hot-dip galvanized steel in a wide range of atmospheric exposures. The study has involved paint systems exposure for 3.5 years in eight natural atmospheres. The atmospheric conditions cover from temperate rural climates to tropical severe marine and Antarctic coastal regions. The paint systems included several alkyds formulated with a variety of pigments (anticorrosive and barrier), epoxies, chlorinated rubber, and zinc-rich (ethyl silicate and epoxy). It has been concluded that in rural and urban atmospheres alkyd systems afford equivalent anticorrosive protection of steel to the epoxy/polyurethane system. The toxic red lead pigment may be replaced in long linseed-oil alkyd primer paints by non-toxic pigments, such as a mixture of micaceous iron oxides (MIO) and black iron oxides or zinc phosphate, without affecting the anticorrosive properties of the paint system. In aggressive atmospheres (industrial, marine), paint systems including zinc-rich primers or applied on galvanized steel must be used, especially in surface regions with coating faults (scribes).     

Effects of cure levels on adhesion between rubber and brass in the composites made up of rubber compound and brass-plated steel cord

The adhesion between rubber compound and brass-plated steel cord of rubber-brass composites with different cure levels was investigated in relation to the formation and growth of their adhesion interphase examined with AES spectroscopy. The optimum-cured adhesion sample showed a maximum pullout force, but the pullout forces of samples under-cured and over-cured were low. The adhesion property of under-cured adhesion samples enhanced with humidity aging due to further curing of rubber and supplementary growth of the adhesion interphase. Cure level exhibiting good adhesion was discussed based on the composition and structure of the adhesion interphase and the crosslinking density of the rubber layer attached to the interphase. This paper is dedicated to Professor Hyun-Ku Rhee on the occasion of his retirement from Seoul National University (Gon Seo).     

带有压敏性的环氧胶带的研制

研制带有压敏性的环氧胶带,可以使用表面涂或内部加压敏胶的方法,两种方法有各自的优缺点。表面涂压敏胶,压敏性好,但固化的粘接强度较低;内加压敏胶则相反。全面衡量,内加压敏胶的方法较好。     

Experimental and theoretical study of the effect of some heterocyclic compounds on the corrosion of low carbon steel in 3.5% NaCl medium

The efficiency of three heterocyclic compounds, 3-amino-1,2,4-triazole, 4-hydroxy-2H-1-benzopyran-2-one and 4-hydroxy-3-(1H-1,2,4-triazole-3-ylazo)-2H-1-benzopyran-2-one (abbreviated 3-ATA, 4-HQ and 3-ATA-Q, respectively) as steel corrosion inhibitors in 3.5% NaCl has been investigated by Tafel extrapolation and linear polarization methods. Corrosion parameters and adsorption isotherms were determined from current-potential curves. It was found that inhibition efficiencies (η%) and surface coverage (θ) increase with an increase in the concentration of 3-ATA and 3-ATA-Q. However, 4-HQ accelerates the corrosion rate as its concentration increases. The adsorption of 3-ATA and 3-ATA-Q on the steel surface obey Langmuir isotherm. A clear correlation was found between corrosion inhibition efficiency and theoretical parameters obtained by the density functional B3LYP/6-31g(d) method. The experimental results are supported by the theoretical data.