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Role of Interface Interpenetration and Domain Size on Dynamic Coupling Across Dissimilar Polymer Domains

界面互穿和域尺寸对不同聚合物域动态耦合的作用

基本信息

批准号：
1905782
负责人：
Connie Roth
金额：
$ 40.03万
依托单位：
Emory University
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
2019
资助国家：
美国
起止时间：
2019-06-01 至 2024-05-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=1905782&HistoricalAwards=false
关键词：
Role Interface Interpenetration Domain Size

项目摘要

NON-TECHNICAL SUMMARY:Advanced materials design for technological applications such as ion conduction, filtration, photoelectric generation, or composite reinforcement is focused on combining different material components at the nanoscale level. This creates systems where nearly all parts are near an interface making the resulting performance primarily dependent on the local material properties near these interfaces. Recent observations have demonstrated an unanticipated strong coupling of dynamics across dissimilar polymer interfaces established during final materials processing and interface formation. The planned research aims to understand what controls this dynamical coupling across dissimilar polymer domains and how interfaces mediate this behavior. Experiments on simplified systems using a series of different techniques will be carried out to investigate what property changes take place in multilayer systems during interface formation and how they alter the dynamics across the material. Integrated with this research will be education of students as well as outreach. Outreach efforts by the PI involve a partnership with Emory's Carlos Museum education programs to develop STEAM (Science, Technology, Engineering, Arts and Mathematics) programing for teachers and school groups covering scientific concepts used by ancient cultures such as historical water management strategies. In collaboration with the Museum's Chief Conservator, undergraduate research projects will characterize polymer resins and their applications used in artwork conservation. TECHNICAL SUMMARY:The planned research aims to understand what controls dynamical coupling across dissimilar polymer domains and how interfaces mediate this behavior. Experiments on simplified systems using a series of different techniques will be carried out to investigate what property changes take place in multilayer systems during interface annealing that alter the dynamics across the material. Comparison of results using multiple experimental techniques on a given system will provide a fuller picture of the relevant phenomena and thus facilitate improved understanding. Experiments on multilayer films with varying layer thicknesses will be done using the following techniques: quartz crystal microscopy to investigate changes in shear wave propagation across dissimilar polymer interfaces upon progressive interface annealing, ellipsometry to study changes in physical aging due to the impact of glassy-rubbery polymer interfaces, and differential scanning calorimetry to compare glass transition breadths and temperature-dependent heat capacities. Results from these techniques will be correlated or contrasted to localized depth-dependent measurements of the glass transition temperature using fluorescence on equivalent systems. The goals of this project are to address which experimentally measurable factors change during interface formation leading to dynamical coupling between different polymer domains, and how finite domain sizes (changing boundary conditions) alter this phenomenon. .This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

非技术总结：用于离子传导、过滤、光电发电或复合材料增强等技术应用的先进材料设计专注于在纳米级水平上组合不同的材料成分。这就产生了几乎所有部件都靠近界面的系统，使得所产生的性能主要取决于这些界面附近的局部材料特性。最近的观察表明，在最终的材料加工和界面形成过程中，不同的聚合物界面之间存在着一种意想不到的强动力学耦合。计划中的研究旨在了解是什么控制了不同聚合物域之间的动态耦合，以及界面如何介导这种行为。将使用一系列不同的技术对简化系统进行实验，以研究在界面形成过程中多层系统中发生了什么性质的变化，以及它们如何改变整个材料的动力学。与这项研究相结合的将是学生的教育以及推广。 PI的外联工作涉及与埃默里大学的卡洛斯博物馆教育计划合作，为教师和学校团体开发STEAM（科学、技术、工程、艺术和数学）课程，涵盖古代文化使用的科学概念，如历史上的水管理策略。与博物馆的首席保护员合作，本科研究项目将描述聚合物树脂及其在艺术品保护中的应用。技术总结：计划中的研究旨在了解是什么控制了不同聚合物域之间的动态耦合，以及界面如何介导这种行为。将使用一系列不同技术对简化系统进行实验，以研究界面退火期间多层系统中发生了哪些性质变化，从而改变了材料的动力学。在给定系统上使用多种实验技术比较结果将提供有关现象的更全面的画面，从而促进更好的理解。多层膜的实验与不同的层厚度将使用以下技术：石英晶体显微镜，以调查在不同的聚合物界面的剪切波传播的变化后，逐步界面退火，椭圆偏振法研究物理老化的变化，由于玻璃橡胶聚合物界面的影响，和差示扫描量热法比较玻璃化转变宽度和温度依赖的热容量。从这些技术的结果将相关或对比本地化的深度依赖性测量的玻璃化转变温度使用荧光等效系统。这个项目的目标是解决实验可测量的因素在界面形成过程中的变化，导致不同的聚合物域之间的动态耦合，以及如何有限域的大小（改变边界条件）改变这种现象。该奖项反映了NSF的法定使命，并通过使用基金会的知识价值和更广泛的影响审查标准进行评估，被认为值得支持。

项目成果

期刊论文数量（9）

专著数量（0）

科研奖励数量（0）

会议论文数量（0）

专利数量（0）

Polymer Glasses

聚合物玻璃

DOI：
10.1002/9783527815562.mme0064
发表时间：
2022
期刊：
Macromolecular Engineering: From Precise Synthesis to Macroscopic Materials and Applications
影响因子：
0
作者：
Connie B. Roth
通讯作者：
Connie B. Roth

Local Glass Transition Temperature T g ( z ) Within Polystyrene Is Strongly Impacted by the Modulus of the Neighboring PDMS Domain

聚苯乙烯内的局部玻璃化转变温度 Tg (z) 受到邻近 PDMS 域模量的强烈影响