Effect of Processing Variables on the Structure and Properties of Plasma Polymerized Films on Metal Substrates

加工变量对金属基材上等离子体聚合膜结构和性能的影响

• 批准号: 9407809
• 负责人: F. James Boerio
• 金额: --
• 依托单位: University of Cincinnati Main Campus
• 依托单位国家: 美国
• 项目类别: Continuing grant
• 财政年份: 1994
• 资助国家: 美国
• 起止时间: 1994-08-01 至 2000-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9407809&HistoricalAwards=false
• 关键词: Effect; Processing; Variables; Structure; Properties

Project Summary Proposal Number: CTS-9407809 P.I.: Boerio Institution: University of Cincinnati Plasma polymerization is a process in which active species such as ions and radicals are formed in a low pressure gas or plasma of a "monomer" by collisions between free electrons and monomer molecules when an electric field is applied to the gas. The active species react with themselves or with monomers to form polymer coatings on the surfaces of solids that are exposed to the plasma. Plasma polymerization is an extremely attractive process for pretreatment of investigations of metals since it enables materials synthesis and processing to be combined into one step. Many investigations of plasma polymerization have been reported but most have focused on only one aspect, such as the effect of processing variables on the rate of film formation. In this research, the University of Cincinnati is collaborating with Ford Motor Co. and Goodyear Tire and Rubber Co. to determine relationships between the processing variables that are used to deposit plasma polymerized films on metal substrates, the molecular structure of the films, especially the surface and interfacial structures, and the performance of the films as primers for rubber-to-metal and spectroscopy (XPS), secondary ion mass spectrometry (SIMS), Auger electron spectroscopy (AES), reflection-absorption infrared spectroscopy (RAIR), ellipsometry, surface-enhanced Raman scattering (SERS), scanning electron microscopy (SEM), and atomic force microscopy (AFM) will be used to determine the effect of processing variables such as discharge power and frequency, monomer, flow rate, pressure, and substrate surface chemistry on the molecular structure and morphology of the films. Electrochemical impedance spectroscopy (EIS), fracture mechanics tests, and industrial test methods will be used to determine performance characteristics of the films such as the corrosion protection they impart to metal substrates, the interfacial fracture energy of films deposited on metal substrates, and the properties of the films as primers for rubber-to-metal and structural adhesive bonding. Surface analysis will be used to examine the failure surfaces of specimens after fracture mechanics and adhesive bonding tests to determine the failure mechanisms. The results obtained will be used to develop relationships between the processing variables used to deposit the films, their molecular structure, and their properties and will represent a significant enhancement to the knowledge base in the important, rapidly expanding field of thin polymer films. Collaboration with Ford will mostly involve structural adhesive bonding of aluminum and surface analysis. Collaboration with Goodyear will involve rubber-to-metal bonding and surface analysis.

项目摘要 提案编号：CTS-9407809 P.I.： Boerio院校：辛辛那提大学 等离子体聚合是这样的过程，其中当向气体施加电场时，通过自由电子与单体分子之间的碰撞，在低压气体或“单体”的等离子体中形成活性物质，例如离子和自由基。 活性物质与自身或与单体反应，以在暴露于等离子体的固体表面上形成聚合物涂层。 等离子体聚合是一种非常有吸引力的金属研究预处理方法，因为它可以将材料合成和加工结合到一个步骤中。 等离子体聚合的许多研究已被报道，但大多数都集中在一个方面，如加工变量对成膜速率的影响。 在这项研究中，辛辛那提大学与福特汽车公司和固特异轮胎和橡胶公司合作，以确定用于在金属基底上存款等离子体聚合膜的工艺变量、膜的分子结构（特别是表面和界面结构）以及膜作为橡胶-金属和光谱（XPS）底漆的性能之间的关系，二次离子质谱（西姆斯）、俄歇电子能谱（AES）、反射-吸收红外光谱（RAIR）、椭圆偏振法、表面增强拉曼散射（Sers）、扫描电子显微镜（SEM）和原子力显微镜（AFM）将用于确定处理变量的影响，所述处理变量例如放电功率和频率、单体、流速、压力，以及基底表面化学对膜的分子结构和形态的影响。 电化学阻抗谱（EIS），断裂力学测试和工业测试方法将用于确定膜的性能特征，如它们赋予金属基材的腐蚀保护，沉积在金属基材上的膜的界面断裂能，以及膜作为橡胶-金属和结构粘合剂粘合的底漆的性能。 表面分析将用于检查断裂力学和粘合剂粘合测试后的样本的失效表面，以确定失效机制。 所获得的结果将用于开发用于存款的薄膜，其分子结构，和它们的属性的处理变量之间的关系，并将代表一个显着的增强知识基础的重要，迅速扩大领域的薄聚合物薄膜。 与福特的合作将主要涉及铝的结构粘合剂粘合和表面分析。 与固特异的合作将涉及橡胶与金属的粘合和表面分析。