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提高鞋用聚氨酯胶粘剂剥离强度的几种途径 总被引:3,自引:0,他引:3
论述了提高聚氨酯胶粘剂剥离强度盼几种途径。包括选择具有结晶度高、结晶速度快的原材料合成聚氨酯胶粘剂,通过改性或添加增粘树盾提高聚氨酯胶粘剂的结晶度和结晶速度。选择合适溶剂、表面处理剂和配合异氰酸酯固化剂使用等,来提高聚氨酯胶粘剂对材质的剥离强度。 相似文献
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丙烯酸酯液体橡胶改性环氧树脂胶粘剂的研究 总被引:7,自引:1,他引:6
以侧链含环氧基团的丙烯酸酯液体橡胶为改性剂 ,二乙撑三胺基甘油正丁基醚为固化剂制备了一种室温固化环氧树脂胶粘剂。重点研究了其粘接工艺性、力学性能和丙烯酸酯液体橡胶的改性作用。研究结果表明 :该胶粘剂具有较好的粘接工艺性能和拉剪强度 ,加入丙烯酸酯液体橡胶后拉伸剪切强度有显著的提高 ;液体橡胶环氧基含量和橡胶添加量对胶粘剂拉剪强度有重要的影响 ,每百份环氧树脂加 10份环氧基含量为 1.2mmol·g-1的丙烯酸酯液体橡胶 ,铝合金胶接试片拉剪强度提高了 133% ,复合材料胶接试片拉剪强度提高了 12 4 % ,4 5 # 钢胶接试片拉剪强度提高了 84 %。 相似文献
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以无机补强剂、复合偶联剂、复合润湿剂、多元共混树脂乳液、增粘树脂乳液、复合消泡剂等为原料制备了水性塑/塑复合胶粘剂。研究了偶联剂、润湿剂、消泡剂等对其复合膜剥离强度的影响,结果表明,偶联剂、润湿剂、消泡剂等通过形成化学键、增加接触面积、减少表面应力破坏等形式可使其剥离强度得到提高,当用量过多时会引起剥离强度下降。 相似文献
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以聚酯改性羟基丙烯酸树脂为主要成膜物质研制了一种底面合一辊涂型风电叶片涂料,选用氟改性有机硅消泡剂和聚醚改性有机硅消泡剂复配能很好地消除辊涂时产生的气泡;选用有机硅流平剂和氟改性聚丙烯酸酯流平助剂复配可以达到优异的流平效果;采用气相二氧化硅和改性脲复配能消除风电叶片涂料的橘皮和立面流挂问题;消光粉和溶剂的选择对表面效果也有影响。 相似文献
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A. Synytska S. Michel D. Pleul C. Bellmann R. Schinner K. -J. Eichhorn K. Grundke A. W. Neumann M. Stamm 《The Journal of Adhesion》2004,80(8):667-683
Two commercially available amine-cured epoxy resin formulations were studied under different environmental conditions with regard to the surface tension evolution using axisymmetric drop shape analysis (ADSA). By employing a new strategy, ADSA was used to monitor simultaneously the surface tension and the density of these reactive mixtures from sessile drops. The kinetics of the bulk reactions were quantified by Fourier transform infrared (FTIR) spectroscopy, and the changes in the molecular composition of the surface region were studied by X-ray photoelectron spectroscopy (XPS).
In both formulations, the surface tension values of the amine hardeners were lower than those of the epoxy resins. For one system, the surface tension of the mixture was similar to the surface tension of the hardener. In this case, the hardener migrates to the surface and determines the surface tension of the mixture, as could be proved by XPS measurements. In the other case, the surface region contained only a very small amount of nitrogen, indicating that the nitrogen-containing groups of the hardener were not enriched in the surface region of this mixture. Its surface tension was similar to that of the pure epoxy resin.
In a controlled argon atmosphere, the surface tension of the reactive epoxy-amine systems considered here changed very little as the curing reaction proceeded. The time-dependent changes of the surface tension of the mixtures were caused by environmental factors, particularly the presence of carbon dioxide and water. Such factors can produce complicated surface tension responses due to surface reactions with the amine hardener. The extent of these changes can be controlled by the migration of the hardener to the surface region. 相似文献
In both formulations, the surface tension values of the amine hardeners were lower than those of the epoxy resins. For one system, the surface tension of the mixture was similar to the surface tension of the hardener. In this case, the hardener migrates to the surface and determines the surface tension of the mixture, as could be proved by XPS measurements. In the other case, the surface region contained only a very small amount of nitrogen, indicating that the nitrogen-containing groups of the hardener were not enriched in the surface region of this mixture. Its surface tension was similar to that of the pure epoxy resin.
In a controlled argon atmosphere, the surface tension of the reactive epoxy-amine systems considered here changed very little as the curing reaction proceeded. The time-dependent changes of the surface tension of the mixtures were caused by environmental factors, particularly the presence of carbon dioxide and water. Such factors can produce complicated surface tension responses due to surface reactions with the amine hardener. The extent of these changes can be controlled by the migration of the hardener to the surface region. 相似文献
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有机硅消泡剂由于其良好的化学惰性和低表面张力,广泛应用于纺织及化工领域。本文重点介绍了有机硅消泡剂的消泡原理、二甲基硅油消泡剂、聚醚改性硅油消泡剂的特性及制备方法,展望了有机硅消泡剂的发展。 相似文献
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有机硅消泡剂KHZ的制备 总被引:9,自引:0,他引:9
根据有机硅氧烷的低表面张力的特性研究开发了高效消泡剂KHZ。消泡剂的活性组份是经有机氯硅烷处理的微细二氧化硅固体颗粒,它具有低能表面,在载体和扩展剂协同下易于发泡介质表面铺展,并且难于被加溶,因而消泡和抑泡性都比较高。消泡剂KHZ适用于造纸、石油化工、化学等行业。 相似文献
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以烯丙醇聚氧乙烯聚氧丙烯醚(FB)、长链烷基酯与含氢硅油(PHMS)通过Si-H加成反应,合成了有机硅高聚物(改性硅油),用IR和1HNMR对其结构进行了表征。将改性硅油作为活性成分,制备了有机硅消泡剂。探讨了长链烷基酯链段长短对其稳定性、表面张力、消抑泡性能的影响。结果表明:甲基丙烯酸十四烷基酯与烯丙醇聚醚共改性硅油所制消泡剂稳定性强,粒径分布最均匀,主要集中在260 nm处,消抑泡效果最优,其在质量分数为5%的十二烷基苯磺酸钠溶液中消泡时间为6 s,在质量分数为5%洗衣粉溶液中消泡时间为4 s,在黑液溶液中(质量分数为30%木质素)消泡时间为12 s,消抑泡性能优于国内(RX-504)与德国(850E)消泡剂产品。 相似文献
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二甲基硅油及其衍生物在消泡帮领域的研究进展 总被引:1,自引:0,他引:1
二甲基硅油由于其良好的化学惰性和低表面张力,广泛应用于消泡剂领域。聚醚改性硅油和氟改性硅油作为二甲基硅油的两种主要衍生产物,具有更强的消、抑泡能力。本论文重点介绍了二甲基硅油消泡剂、聚醚改性硅油消泡剂、氟改性硅油消泡剂的特性、制备方法及应用。 相似文献
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文章主要讨论了高性能消泡剂在水性油墨中的应用。水墨用高性能消泡剂主要具有快速消泡能力、持久的抑泡能力、抗剪切以及良好的体系相容性。文章介绍了水性油墨用消泡剂的分类,并侧重介绍了消泡剂在松香水墨及丙烯酸水墨的使用情况。结果表明,测试所选用的消泡剂具有良好的消泡性能及体系相容性,完全可以替代进口同类产品使用。 相似文献
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以摩尔比为1∶2∶2.5∶5的腰果酚、苯酚、二乙烯三胺、甲醛制得了一种新型的常温交联型环氧固化剂。在合成的低黏度环氧固化剂中,加入适当的颜填料、助剂制成高固体分环氧防锈漆A组分,与低相对分子质量环氧树脂(B组分)固化后漆膜的综合性能优异,硬度较高,柔韧性及抗冲击性能较好,耐高温、耐化学品性好,耐盐雾性达2 000 h以上,且涂层具有较好的可复涂性,可用作油管内壁涂料。 相似文献