受限空间对均聚物相分离的影响
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- 英文论文题名：The effect of confined space on phase separation of homopolymers
- 论文作者：阚迪 ; 何学浩
- 英文论文作者：Di Kan ; Xuehao He ; Department of Chemistry ; Tianjin University
- 年：2016
- 作者机构：天津大学化学系;
- 论文关键词：柱坐标 ; 自洽场 ; 均聚物
- 会议召开时间：2016-07-01
- 会议录名称：中国化学会第30届学术年会摘要集-第二十四分会：超分子组装与软物质材料
- 语种：中文
- 分类号：O631.1
- 学会代码：ZGHY
- 会议名称：中国化学会第30届学术年会-第二十四分会 ; 超分子组装与软物质材料
- 会议地点：中国辽宁大连
- 主办单位：中国化学会
- 学会名称：中国化学会
- 页数：1
- 文件大小：136k
- 原文格式：D
- 会议级别：全国
摘要
目前,高分子材料得到了突飞猛进的发展,这不仅体现在材料种类的丰富,也体现不同聚合物之间的共混制取的各种高性能新型材料的广泛应用。高分子材料的性能主要取决于这些材料的相结构,而这些材料的相结构又与其相分离行为密切相关。研究在受限空间中两种均聚物相分离的双节线问题就非常重要。由于球受限空间在三维空间中具有良好的对称性,我们采用了柱坐标来计算球受限空间。我们利用自洽场理论~([1]),通过改变两种均聚物之间的相互作用和两种均聚物之间的混合比例,得到了在球受限空间中两种不同均聚物相分离的相图。通过更改不同空间大小,我们最终得到了三组相图。在三组相图中我们分别找到了两种均聚物在不同空间下相分离的双节线。由于受到空间大小的影响,这三条双节线随着空间变小,双节线的U型开口依次减小。我们又将在球受限空间下的两种对称均聚物的双节线的U型开口与理论计算得到非受限空间下两种对称均聚物的双节线的U型开口相比较,我们发现在球受限空间下的双节线的U型开口较小。
In our work, the sphere constrained space was calculated in cylindrical coordinate. We applied self-consistent field theory to study the phase separation between two kinds of homopolymers in sphere constrained space. As a result, we obtained the phase diagram. The phase diagram is about the equilibrium configuration in sphere confined space as a function of the interaction and mixture ratio between two kinds of homopolymers. By varying the space size, three phase diagrams were obtained. Three binodals in sphere constrained space were found in three phase diagrams, respectively. With the space size decreasing, the u-shaped opening of binodal decreases in turn. Compared with the theoretically calculated biondal in bulk, the u-shaped opening of binodal in sphere constrained space is smaller.
In our work, the sphere constrained space was calculated in cylindrical coordinate. We applied self-consistent field theory to study the phase separation between two kinds of homopolymers in sphere constrained space. As a result, we obtained the phase diagram. The phase diagram is about the equilibrium configuration in sphere confined space as a function of the interaction and mixture ratio between two kinds of homopolymers. By varying the space size, three phase diagrams were obtained. Three binodals in sphere constrained space were found in three phase diagrams, respectively. With the space size decreasing, the u-shaped opening of binodal decreases in turn. Compared with the theoretically calculated biondal in bulk, the u-shaped opening of binodal in sphere constrained space is smaller.
引文
[1]M.W.Matsen,J.Chem.Phys.2004,121:1938.