Light-Induced Hierarchical Morphology of Polymer Mixtures Confined in the Mesoscopic Length Scales.

在本研究中，利用光化学反应将聚合物混合物从单相驱动到相图上的不稳定区，研究了光诱导相分离现象。用激光扫描共聚焦显微镜研究了相分离与反应之间的竞争关系。得到了以下结果：1)用Mach-Zehnder干涉法测量光反应多组分聚合物的弹性变形。2)用计算机辅助辐照（CAI）方法设计特征长度尺度在微米范围内任意分布的聚合物的进展。3)采用延时辐照技术设计具有分层形貌的多相高分子材料。4)具有空间梯度形态和任意特征长度尺度分布的互穿聚合物网络（IPNs）的合成。通过上述结果，我们可以得出结论，光化学反应可以控制和设计具有多种形态的多相聚合物材料

In this study, light-induced phase separation phenomena were studied by using photochemical reactions to drive a polymer mixture from the one-phase into the unstable region on the phase diagram. The competition between the phase separation and the reaction was investigated by using laser scanning confocal microscope. The following results were obtained.:1) Measurements of elastic deformation in photo-reactive multicomponent polymers by using Mach-Zehnder Interferometry.2) Developments of Computer-Assisted Irradiation (CAI) method for designing polymers with an arbitrary distribution of characteristic length scales in the micrometers range.3) Designing multiphase polymer materials with hierarchical morphology by using irradiation with a time delay.4) Synthesis of interpenetrating polymer networks (IPNs) with spatially graded morphology and an arbitrary distribution of characteristic length scales.With the above-mentioned results, we are able to conclude that multiphase polymer materials with a variety of morphologies can be controlled and designed by using photochemical reactions