Electric Field Effects on Polymer Alloys

电场对聚合物合金的影响

• 批准号: 9202988
• 负责人: Sonja Krause
• 金额: $ 48万
• 依托单位: Rensselaer Polytechnic Institute
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1992
• 资助国家: 美国
• 起止时间: 1992-08-15 至 1998-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9202988&HistoricalAwards=false
• 关键词: Electric; Field; Effects; Polymer; Alloys

New recent work has demonstrated that electric fields can be used to produce phase-separated polymer alloys with unique morphologies. Film casting in electric fields has allowed the production of samples containing spherical minor phases with controlled dimensions, spherical minor phases that form "pearl chains" across the sample, ellipsoidal minor phases that form chains across the sample, columnlike minor phases across the sample, and unique morphologies in mixtures of block copolymers with homopolymers. This work will be extended using anisotropic samples which are expected to have anisotropic mechanical properties and dielectric constants, for example, when the ordered minor phases are made of conducting polymers, the dielectric constant in the direction of orientation of the minor phases is expected to be exceptionally high. When the columnlike phases are made of conducting polymers, the samples should exhibit conductivity in only one direction. The electrical characteristics of these composites are of particular interest since it is these properties and the ability to modulate them that lies at the heart of imaging, marking, and display technologies.

最近的新工作表明，电场可以用来 以生产具有独特形态的相分离的聚合物合金。 电场中的薄膜浇铸允许生产 含有球形次要相的样品， 尺寸，球形次要相，形成“珍珠链”， 样品，椭圆形的次要相，形成链横跨 样品，样品上的柱状次要相，以及独特的 嵌段共聚物与均聚物的混合物中的形态。 这项工作将使用各向异性样品进行扩展， 预期具有各向异性的机械性能和介电性能 常数，例如，当有序的次要相由 导电聚合物，介电常数的方向， 预计次要相的取向将异常 高 当柱状相由导电聚合物制成时， 样品应仅在一个方向上表现出导电性。 这些复合材料的电特性是 特别感兴趣，因为它是这些属性和能力， 调节它们，它们是成像、标记和 显示技术。