Theoretische und experimentelle Untersuchungen von Benetzungseigenschaften von dünnen ein- und zweikomponentigen Polymerfilmen

单组分和双组分聚合物薄膜润湿性能的理论和实验研究

• 批准号: 5107466
• 负责人: Professor Dr. Manfred Stamm
• 金额: --
• 依托单位: Leibniz-Institut für Polymerforschung Dresden (IPF)
• 依托单位国家: 德国
• 项目类别: Priority Programmes
• 财政年份: 1998
• 资助国家: 德国
• 起止时间: 1997-12-31 至 2004-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/5107466?language=en
• 关键词: Theoretische; und; experimentelle; Untersuchungen; von

Stabilisation of thin polymer films is of great practical importance for many applications in physics, chemistry, medicine, biology and material science. Utilising the spin-coating technique thin polymer films can be prepared on a large variety of different solid substrates including also non-wetting surfaces, where films are not stable. Different processes can contribute to film destabilisation during annealing above the glass transition temperature. Those effects are studied in the already running project on model systems. Real systems are, however, significantly different for instance due to the influence of substrate roughness and chemical inhomogeneity. A systematic study of those effects is still largely missing. Besides the influence of substrate parameters also the chemical nature of used polymer molecules is of importance. For instance block copolymers can be used for film stabilisation, but are also interesting because of the formation of ordered structures on themselves. The dewetting of block copolymers on solid substrates has hardly been studied up to now.In this project it is proposed to investigate the influence of substrate properties (roughness and chemical heterogeneity), which will be modified in a well defined way, as well as porticular plymer properties on the stabilisation of the film. The time scale of dewetting is taken as a measure of film stability. With scattering techniques we obtain information on a large sample area, which is characteristic for the dewetting process. By the use of local imaging techniques a picture of different aspects of stability and dewetting is obtained on different length scales.

聚合物薄膜的稳定化对于物理学、化学、医学、生物学和材料科学中的许多应用具有重要的实际意义。利用旋涂技术，可以在各种不同的固体基底上制备薄聚合物膜，所述固体基底还包括膜不稳定的非润湿表面。在高于玻璃化转变温度的退火过程中，不同的工艺会导致膜不稳定。这些影响已在模型系统上运行的项目中进行了研究。然而，真实的系统是显著不同的，例如由于基底粗糙度和化学不均匀性的影响。对这些影响的系统研究在很大程度上仍然缺失。除了基底参数的影响之外，所用聚合物分子的化学性质也是重要的。例如，嵌段共聚物可用于膜稳定，但也是令人感兴趣的，因为在其自身上形成有序结构。到目前为止，嵌段共聚物在固体基底上的去湿研究很少，在本项目中，建议研究基底性质（粗糙度和化学不均匀性）的影响，这些性质将以明确的方式进行修改，以及对膜的稳定性的特殊聚合物性质。将去湿的时间尺度作为膜稳定性的量度。与散射技术，我们获得的信息上的一个大的样品面积，这是特征的去湿过程。通过使用局部成像技术，在不同的长度尺度上获得稳定性和去湿的不同方面的图片。