Copolymers and Plasticized Polymers at Interfaces

界面处的共聚物和增塑聚合物

• 批准号: 1005606
• 负责人: Frank Blum
• 金额: $ 35.4万
• 依托单位: Oklahoma State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2010
• 资助国家: 美国
• 起止时间: 2010-07-15 至 2014-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1005606&HistoricalAwards=false
• 关键词: Copolymers; Plasticized; Polymers; Interfaces

TECHNICAL ABSTRACT This research is focused on determining the behavior of copolymers and plasticized polymers adsorbed on the surfaces of particles and on the development of nanocomposites where the interaction of the polymer with the particles is critical to their use in different applications. Polymers adsorbed at interfaces have properties that are altered compared to those in bulk. Their characterization is often difficult and sometimes impossible to determine with many techniques, as most of the interfacial polymer systems are opaque. A variety of techniques, including, nuclear magnetic resonance spectroscopy (NMR), and also modulated differential scanning calorimetry (MDSC), and Fourier-transform infra-red spectroscopy (FTIR) will be used to understand the behavior of these important interfacial systems. The intellectual merit of this project lies in the understanding of the behavior of copolymers and plasticized polymers at interfaces and the role of polymers in nanocomposite systems. Copolymers are often used in surface systems because the presence of a single monomer alone does not always have the preferred properties for a specific application. Given the different characteristics of monomers, copolymers at interfaces will have differences in structure and dynamics compared to their behavior in bulk. Plasticizers may also behave differently in surface polymers than in bulk. With the synthesis of specially labeled plasticizers, it should be possible to understand how the plasticizer behaves in surface adsorbed polymers. In situations where the plasticizer is not effective in the adsorbed polymers, it should be possible to determine if the polymer excludes the plasticizer or effectively entraps it in the constrained polymer configuration at the surface. This work will also help in understanding the role of polymers in nanocomposites for different applications, e.g. electronic and catalytic applications.NON-TECHNICAL ABSTRACTThis project is focused on providing fundamental scientific understanding of the behavior of polymeric materials at interfaces and the role of polymers in nanocomposite systems. The broader impact of the work lies in the application of this knowledge to the design of new systems where polymers are used in conjunction with solid fibers and fillers. Structural, electronic and other devices can be improved by an understanding of the interfacial layers of polymers. In addition, devices such as memory and catalysis sensors can be more readily developed based on information gained through research on nanocomposite materials. The integrated training provided to students, at all levels, will be another significant benefit of this work. They will receive a broad-based education in the polymer/materials area with specific expertise in polymer synthesis, polymer characterization, physical and electronic properties of polymers. The PI has been very active throughout his career in educational and outreach activities and will continue to do so through this award.

技术摘要本研究的重点是确定吸附在颗粒表面上的共聚物和增塑聚合物的行为，以及开发纳米复合材料，其中聚合物与颗粒的相互作用对其在不同应用中的使用至关重要。吸附在界面处的聚合物与本体中的聚合物相比具有改变的性质。由于大多数界面聚合物系统是不透明的，因此它们的表征通常很困难，有时甚至不可能用许多技术来确定。各种技术，包括核磁共振光谱（NMR），以及调制差示扫描量热法（MDSC）和傅里叶变换红外光谱（FTIR）将用于了解这些重要的界面系统的行为。该项目的智力价值在于理解共聚物和增塑聚合物在界面处的行为以及聚合物在纳米复合材料体系中的作用。共聚物通常用于表面系统中，因为单独存在单一单体并不总是具有特定应用的优选性质。鉴于单体的不同特性，界面处的共聚物与它们在本体中的行为相比将具有结构和动力学上的差异。增塑剂在表面聚合物中的行为也可能与在本体中不同。通过合成特殊标记的增塑剂，应该可以了解增塑剂在表面吸附聚合物中的行为。在增塑剂在吸附的聚合物中无效的情况下，应该可以确定聚合物是否排除增塑剂或有效地将其捕获在表面处的约束聚合物构型中。这项工作还将有助于了解聚合物在纳米复合材料中的作用，用于不同的应用，例如电子和催化应用。非技术摘要该项目的重点是提供对聚合物材料在界面处的行为以及聚合物的作用的基础科学理解纳米复合材料系统。 这项工作的更广泛的影响在于将这一知识应用于设计新系统，其中聚合物与固体纤维和填料结合使用。通过了解聚合物的界面层，可以改进结构、电子和其他设备。此外，基于通过对纳米复合材料的研究获得的信息，可以更容易地开发诸如存储器和催化传感器之类的设备。向各级学生提供的综合培训将是这项工作的另一个重要好处。他们将在聚合物/材料领域接受广泛的教育，在聚合物合成，聚合物表征，聚合物的物理和电子特性方面具有特定的专业知识。 PI在他的职业生涯中一直非常积极地参与教育和外展活动，并将通过这个奖项继续这样做。