GOALI: Understanding the Role of Interfacial Structure in Controlling Oil-Resistant Properties of Elastomeric Rubbers

目标：了解界面结构在控制弹性橡胶耐油性能中的作用

• 批准号: 0355304
• 负责人: Ali Dhinojwala
• 金额: --
• 依托单位: University of Akron
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2004
• 资助国家: 美国
• 起止时间: 2004-04-01 至 2007-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0355304&HistoricalAwards=false
• 关键词: GOALI; Understanding; Role; Interfacial; Structure

Dhinojwala, Ali - University of AkronMohsen Yeganeh and Dennis Peiffer - ExxonMobil Research and Engineering "GOALI: Understanding the Role of Interfacial Structure in Controlling Oil-ResistantProperties of Elastomeric Rubbers"The objective of this research is to study the surface interaction of two important commercial elastomers, EXXPRO and nitrile rubbers, with oil and water. EXXPRO and nitrile rubbers are based on brominated methylstyrene and polyacrylonitrile (PAN), respectively. In the U.S. alone, the production of copolymers based on PAN and EXXPRO is 1 billion lbs./year. The oil-resistance and good weatherability properties of these substances are inherently dependent on understanding the interaction of these polymers with hydrophobic and hydrophilic liquids (oil and water). The PIs propose to study the molecular structure at polymer/liquid interface using a surface-sensitive infrared-visible sum frequency generation spectroscopy (SFG). The content of PAN in nitrile rubber and brominated methylstyrene in EXXPRO will be varied systematically, and the influence of these polar substitutions on the surface structure will be studied at air, water, and n-alkane interfaces. Selectively deuterated polymers and liquids will be used to independently study the orientation of both the polymer and water (or alkanes) groups at the interface. This information will allow development of a fundamental understanding of the relationship between the structures at the interface and their oil-resistant and weatheribility properties. The research focuses on applying this new surface characterization technique on industrially important copolymers that contain both hydrophobic and hydrophilic groups. Hydrophilic and hydrophobic segments are also the main ingredients of copolymers for biomedical applications, coatings and surface-active additives. This study will help in understanding these systems as well.Broader Impact: The surface interaction of polymers with liquids is important in many industrial and biomedical applications. The interaction of acrylonitrile in acrylic fibers or gasoline pipelines with water or oil is important in understanding the mechanism behind these applications. This work will provide a direct measurement of the structure of both the polymer molecules and hydrophobic or hydrophilic liquids at the polymer/liquid interfaces. This information will be important to ExxonMobil and other industries involved in designing polymers that are often exposed to water or other fluids. The long- term goal of this research is to aid scientists in designing engineered copolymers using mettalocene chemistry to produce better oil and water resistant properties. This study will also provide important insight into the development of biocompatible (bio-invisible) polymers for biomaterial applications.The project will also provide valuable training to the post-doctoral and graduate students because of their collaboration in an industrial laboratory.

Dhinojwala，Ali- Akronmohsen Yeganeh和Dennis Peiffer-埃克森莫比尔研究与工程学“目标：了解界面结构在控制弹性橡胶的耐石油 - 耐石油橡胶中的作用”这项研究的目的是研究两个重要的商业弹性和expro and exxpro and exxpro and expro and expro的表面交互。 Exxpro和硝酸橡胶分别基于溴化甲基苯乙烯和聚丙烯硝那烯（PAN）。仅在美国，基于PAN和EXXPRO的共聚物的生产为10亿磅/年。这些物质的石油耐石材和良好的天气性能固有地取决于了解这些聚合物与疏水和亲水性液体（油和水）的相互作用。 PI建议使用表面敏感的红外可见总和产生光谱（SFG）研究聚合物/液体界面处的分子结构。氮橡胶中锅的含量和exxpro中溴化的甲基苯乙烯的含量将有系统地变化，这些极性取代对表面结构的影响将在空气，水和N-烷烃界面上进行研究。有选择的氘化聚合物和液体将用于独立研究界面上聚合物和水（或烷烃）基团的方向。这些信息将允许对界面上结构之间的关系及其耐石油和天气性能的基本了解。该研究重点是将这种新的表面特征技术应用于包含疏水和亲水性基团的工业重要共聚物。亲水性和疏水性片段也是生物医学应用，涂料和表面活性添加剂的共聚物的主要成分。这项研究也将有助于理解这些系统。BRODER的影响：聚合物与液体的表面相互作用在许多工业和生物医学应用中很重要。丙烯腈在丙烯酸纤维或汽油管道中与水或油的相互作用对于理解这些应用背后的机制很重要。这项工作将直接测量聚合物分子和聚合物/液体界面处的聚合物分子和疏水或亲水性液体的结构。这些信息对于埃克森美孚和其他参与设计的聚合物的行业将很重要，这些聚合物通常会暴露于水或其他流体中。这项研究的长期目标是帮助科学家使用元世化学来设计工程的共聚物，以产生更好的油和防水特性。这项研究还将为生物材料应用的生物相容性（可视化）聚合物的开发提供重要的见解。由于他们在工业实验室的协作，该项目还将为博士后和研究生提供宝贵的培训。