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嵌段共聚物所形成特定的空间图样,其微观形态不仅与各组分之间的相互作用以及各组分的含量有关,嵌段的空间受限状况也会对分相形态造成一定的影响.为了研究受限于球壳内的线型AB两嵌段共聚物的相分离行为,构建了适用于闭合球壳空间的Laplace-Beltrami算子,并运用TDGL(time dependent Ginzburg-Landau)介观动力学方程,对在不同尺寸的球壳中发生的相分离行为进行分析,关注的重点是球壳的半径和厚度对微观形态的影响.通过对分相形态和不同组分在球壳内分布的考察表明,随着球壳半径和厚度的增加,高分子链所受到的空间限制减小,其在球壳内的分相形态的规整性随之降低.尤其是在球壳的厚度增加时,非对称线性AB两嵌段共聚物的不同嵌段在球壳内的浓度分布发生明显变化.
The specific spatial pattern formed by the block copolymer is not only related to the interaction between the components and the content of each component, but also the space constraints of the block also affect the phase separation morphology. In order to study the phase separation behavior of linear AB diblock copolymers confined in the spherical shell, a Laplace-Beltrami operator for the closed spherical shell space is constructed and the time-dependent Ginzburg-Landau (TDGL) Learning equations, the phase separation behavior occurred in different sizes of spherical shell analysis, the focus of attention is the radius and thickness of the spherical shell on the microscopic morphology of the phase morphology and distribution of different components within the spherical shell The investigation shows that with the increase of the radius and thickness of the spherical shell, the space limitation of the polymer chain decreases and the regularity of the phase separation in the spherical shell decreases, especially when the thickness of the spherical shell increases, The asymmetric linear AB diblock copolymer of different blocks in the spherical shell concentration distribution changes significantly.