本项目拟通过薄膜拉伸法及化学合成法制备外形可控的非球形固体粒子，与高分子共混物复合构建模型体系，借此深入揭示粒子形状、尺寸及表面特性在决定多组分聚合物复合材料微观结构形成及稳定性中的相对贡献。本项目将利用动态/小角激光光散射、低温扫描电镜、荧光共聚焦显微镜、光学-剪切联用系统及动态流变等技术，重点研究（1）非球形粒子在制备过程中的形成机理、形变动力学及控制；（2）非球形粒子在不同黏弹性的模型共混体系中的扩散、迁徙及选择性分布行为；（3）微球形状对流场下模型共混物形态演变的微观动力学过程（包括相区的凝聚、破碎和松弛等）及流变学响应的影响。本项目从微观及在线的角度对固体粒子稳定多组分聚合物复合物制备过程中发生的结构演化进行基础研究，对深入认识这类体系在流场下的结构演化和稳定性的控制因素、澄清现有实验现象及机理研究中的分歧与争议具有重要意义，可为制备具有预想微观结构及宏观性能的新型复合材料提供理论指导和实验依据。

Although highly versatile and widely used, a fundamental understanding of particle-filled immiscible polymer blends is lacking and basic science is necessary to prepare multiphase polymeric materials with well-controlled structures and performers both efficiently and economically. The proposed research aims to understand how characteristics of solid particles, in particular, shape, size and surface chemistry, determine the morphology formation and stability of immiscible polymer blends with a progressive change in viscoelasticity. Shape-controllable anisotropic polymeric and inorganic particles will be prepared and then blended with polymer blends to construct model systems for mechanism investigation. Taking advantage of model systems, we will (a) investigate the diffusion, migration and selective location of anisotropic particles in viscoelastic polymeric components and their impacts on the bulk and interfacial properties of blends, (b) determine the morphology evolution dynamics of polymer blends in the presence of anisotropic particles, including droplet coalescence, breakup, deformation and relaxation, both in quiescent state and under flow, and (c) complement microscopic, rheological and light scattering experiments with theory to delineate the respective contributions of particle characteristics, especially shape, on the morphology evolution of polymer blends. This program will afford new insights into the fundamental origins of complex structural evolution in particle-filled polymer blends, and contribute to the advancement of relevant science and technique.