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南京大学 化学化工学院 高分子科学与工程系,高性能高分子材料教育部重点实验室,光刻胶材料教育部工程技术中心,配位化学国家重点实验室,南京 210023
Received:01 October 2024,
Accepted:07 November 2024,
Published Online:31 December 2024,
Published:20 February 2025
移动端阅览
吴茗, 殷爽渤, 段敏芝, 陶松林, 封成栋, 汪蓉, 王晓亮, 周东山, 薛奇. 受限态高分子的微观动力学与流变学行为研究进展. 2025, 38(2), 333–353
Wu, M.; Yin, S. B.; Duan, M. Z.; Tao, S. L.; Feng, C. D.; Wang, R.; Wang, X. L.; Zhou, D. S.; Xue, Q. Progress on dynamics and rheology behavior of confined polymers. Polym. Bull. (in Chinese), 2025, 38(2), 333–353
吴茗, 殷爽渤, 段敏芝, 陶松林, 封成栋, 汪蓉, 王晓亮, 周东山, 薛奇. 受限态高分子的微观动力学与流变学行为研究进展. 2025, 38(2), 333–353 DOI: 10.14028/j.cnki.1003-3726.2025.24.293.
Wu, M.; Yin, S. B.; Duan, M. Z.; Tao, S. L.; Feng, C. D.; Wang, R.; Wang, X. L.; Zhou, D. S.; Xue, Q. Progress on dynamics and rheology behavior of confined polymers. Polym. Bull. (in Chinese), 2025, 38(2), 333–353 DOI: 10.14028/j.cnki.1003-3726.2025.24.293.
高分子体系具有典型的多尺度特征,当其处于受限态时,高分子的微观动力学、黏弹性、流动性都会偏离本体行为,进而对纳微尺度的成型加工及其使用性能带来显著性影响。本文从高分子单链受限过孔开始,到本体受限流动,对比了不同维度下链运动行为的差异,重点探讨了尺寸效应、表界面相互作用、链受限效应、缠结度等因素对流动过程的影响,及其适用的表征方法和理论。在高分子熔体降温至玻璃态的过程中,受限界面上的残余应力与降温速率、界面曲率高度相关。位于自由界面上的玻璃态受限高分子表现出远高于本体的运动性,而接近吸附界面的高分子受束缚作用运动受阻,多种因素的竞争导致玻璃态受限高分子微观动力学分布的多样性。本文围绕这些核心要素对高分子动力学和流变学行为的影响做了简要综述,旨在深入理解高分子在受限条件下的流动到玻璃化过程的特点,进而为当前微器件、微芯片等领域中涉及的高分子加工成型与使用性能的构效关系提供更全面的视角和更深入的认识。
Polymer dynamics span the range from the segmental scale involving only a few repeated units to relaxation of the entire macromolecular chain (tens of nanometers). When it was confined in nano to micro scales
its dynamics
viscoelasticity and rheology behaviors would deviate from its bulk behavior. Such deviation makes it more complex in processing and results in unpredictable performance at nano and micro scales. Here in this review
the process of single chains through nanopore and polymer melts under confinement of different dimension were summarized. Special attention was drawn on contribution of scale
interaction
conformation of confined chains
degree of entanglement
and corresponding characterization technique and theory therein. While cooling from melt to glass state
extra thermal stress alters the confinement of polymers vitrificated in nanopores or on thin films. Unexpected fast segmental mobility appeared on free surface of polymers while retarded on interface with strong interaction. In this review
we reviewed the current progress on dynamics and rheology behavior of confined polymers
wishing to providing some insight to advanced manufactures
such as microchip
microdevice.
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