U.S.-Japan Cooperative Research: Transition of Mean-Field to Ising Behavior of Polymer Blends

该奖项将使纽约州立大学的朱邦造教授 约克在斯托尼布鲁克与东京大学的Takuhei Nose教授合作 日本理工学院，为期两年。 他们将 研究二元聚合物共混物的行为与 二元流体混合物。 聚合物共混物可以表现为至少 两种不同的方式，取决于它们是否只由高 或仅为低分子量级分;或为高分子量级分 溶解在小分子溶剂中的重量分数。 研究 这两种行为模式之间的交叉将被研究 通过对一种聚合物组分使用高分子量级分 和通过改变第二聚合物组分的分子量。 对于这些不同的混合物，这些可测量的量，如局部 浓度波动和相分离的性质将是 用于在行为类型之间的交叉处表征行为。 本研究的目的是检验批判理论的基本理论 现象的聚合物系统，并提供新的知识， 先进高分子材料领域。 研究人员分享了 对聚合物溶液、共混物和临界现象感兴趣， 曾经参观过对方的实验室 其合并 在聚合物动力学方面的经验增加了成功的可能性， 这项工作

This award will enable Prof. Ben Chu of the State University of New York at Stony Brook to collaborate with Prof. Takuhei Nose of the Tokyo Institute of Technology, Japan, over a period of two years. They will investigate how the behavior of binary polymer blends differs from that of binary fluid mixtures. Polymer blends may behave in at least two different ways, depending upon whether they consist only of high or only of low molecular weight fractions; or of high molecular weight fractions dissolved in a solvent of small molecules. Study of the cross-over between these two modes of behavior will be examined by using a high molecular weight fraction for one polymer component and by varying the molecular weight of the second polymer component. For these various blends, such measurable quantities as local concentration fluctuations and properties of phase separation will be used to characterize behavior at the cross-over between behavior types. The purposes of this research are to test the basic theory of critical phenomena for polymer systems, and to provide new knowledge in the field of advanced polymer materials. The researchers share common interests in polymer solutions, blends, and critical phenomena, and have visited each other's laboratories in the past. Their combined experience in polymer dynamics adds to the probability of success of this work.