Molecular Structural Design of Miscible Polymer Blends

可混溶的聚合物共混物具有简单的连续 性质和组成之间的关系，当无定形时， 与许多不混溶的共混物不同， 这些组件。 高纯度的可混溶共混物 因此，具有较便宜聚合物的聚合物提供了 在较宽的范围内规定性能水平的优点 最低成本。 这项研究的目的是促进 原理，通过示例，用于控制 通过分子结构设计来制备这种类型的共混物。 在 特别是，这项研究的重点是确定的例子， 现有的或新的高性能聚合物的可混溶共混物， 例如聚碳酸酯、聚砜、聚丙烯酸酯等， 基于商品单体如苯乙烯的较便宜的聚合物， 甲基丙烯酸甲酯、丙烯腈等。 找到在能量上接近 然后用共聚的方法使它们 通过分子内排斥的益处而有效地混溶 方面的影响. 对这种系统的研究必须遵循以下原则： 原则，因为组成变量的数量太多， 很高兴能随机探索它们。 这项工作涉及 应用最新的可扩展性理论和技术 除了合成靶向的 聚合物或共聚物。 除了确定 潜在的有用材料，这项工作应该回答重要的 关于分子间相互作用的基本问题。

Miscible polymer blends have a simple continuous relationship between properties and composition, when amorphous, unlike many immiscible blends whose properties may fall below those of the components. Miscible blends of high-preformance polymers with less expensive polymers consequently offer the advantage of specifying performance levels within wide limits for minimum cost. The goal of this research is to advance the principles, through example, for controlling phase behavior of blends of this type through molecular structural design. In particular, this research focuses on identifying examples of miscible blends of existing or new high-performance polymers, such as polycarbonates, polysulfones, polyacrylates, etc. with less expensive polymers based on commodity monomers like styrene, methyl methacrylate, acrylonitrile, etc. The strategy is to find homo-polymer pairs that are energetically close to the border of miscibility and then use copolymerization to make them usefully miscible via the benefits of intramolecular repulsion effects. A search for such systems must be guided by principles, since the number of compositional variables is too great to randomly explore them all. This work involves application of the latest theories of miscibility and techniques for quantifying interactions in addition to synthesis of targeted polymers or copolymers. In addition to identification of potentially useful materials, this work should answer important basic question aboutintermolecular interactions.