Abstract The correlation between mechanical properties and the structural changes of a block copolymer having spherical microdomains in uniaxial stretching was examined by atomic force microscopy observations and two-dimensional small-angle X-ray scattering measurements. For this purpose, coated layers composed of di- and tri-block copolymer blends were prepared by solution coating at different drying temperatures. It was revealed that the bcc lattice underwent affine deformation up to a certain stretching ratio ( λ ), irrespective of the drying temperature, and that the upper limit of λ for the affine deformation is approximately the same as the stretching ratio at which the stress–strain curve rises dramatically. It was also found that the packing regularity of spheres in the uniaxial stretching direction is enhanced with stretching after a plateau region where the regularity does not change. The behavior of the packing regularity as a function of the stretching ratio strongly depends on the drying temperature. We could correlate the fracture of the block copolymer film having spherical microdomains with the completion of the stretching-induced ordering of spheres in the stretching direction. The correlation between mechanical properties and structural changes upon uniaxial stretching was studied by atomic force microscopy observations and two-dimensional small-angle X-ray scattering measurements. For this purpose, coated layers composed of di- and tri-block copolymer blends were prepared by solution coating at different drying temperatures. The packing regularity of spherical microdomains in the stretching direction was enhanced with stretching. We could correlate fracture of the block copolymer film having spherical microdomains with the completion of stretching-induced ordering of spheres in the stretching direction, which sensitively depended on the drying temperature.

中文翻译：

---

溶液涂布干燥温度对成球嵌段共聚物薄膜单轴拉伸结构变化的影响

摘要 通过原子力显微镜观察和二维小角 X 射线散射测量，研究了机械性能与单轴拉伸中具有球形微畴的嵌段共聚物的结构变化之间的相关性。为此，在不同干燥温度下通过溶液涂覆制备由二嵌段和三嵌段共聚物共混物组成的涂层。结果表明，无论干燥温度如何，体心立方晶格都会在一定的拉伸比（ λ ）下发生仿射变形，并且仿射变形的 λ 上限与应力 -应变曲线急剧上升。还发现，在规则不变的平台区域之后，球体在单轴拉伸方向上的堆积规律随着拉伸而增强。作为拉伸比函数的堆积规律的行为强烈依赖于干燥温度。我们可以将具有球形微畴的嵌段共聚物膜的断裂与拉伸方向上球体的拉伸诱导排序的完成相关联。通过原子力显微镜观察和二维小角 X 射线散射测量研究了单轴拉伸时机械性能和结构变化之间的相关性。为此，在不同干燥温度下通过溶液涂覆制备由二嵌段和三嵌段共聚物共混物组成的涂层。球形微畴在拉伸方向上的堆积规律随着拉伸而增强。我们可以将具有球形微畴的嵌段共聚物膜的断裂与在拉伸方向上完成拉伸诱导的球体排序相关联，这敏感地取决于干燥温度。