NIRT: Influence of Nanoscale Structure and Dynamics on the Deformation of Polymer Glass Nanocomposites

NIRT:纳米结构和动力学对聚合物玻璃纳米复合材料变形的影响

基本信息

  • 批准号:
    0506840
  • 负责人:
  • 金额:
    $ 131.9万
  • 依托单位:
  • 依托单位国家:
    美国
  • 项目类别:
    Standard Grant
  • 财政年份:
    2005
  • 资助国家:
    美国
  • 起止时间:
    2005-09-01 至 2009-08-31
  • 项目状态:
    已结题

项目摘要

ABSTRACT - 0506840U of Wisconsin MadisonEven though polymeric glasses are impressive engineering materials, there are considerable opportunities to improve their strength and failure properties. Recent evidence indicates that reinforcement of polymer glasses with nanoscale particles (i.e. nanocomposites) can produce materials with strength and failure properties that are substantially improved and, given current understanding, cannot be produced in any other manner. The systematic development of new glassy nanocomposites will require an intricate understanding of deformation processes on the nanoscale. We propose an integrated effort that utilizes experiments, simulations, and theory to develop the needed understanding. Experiments will be used to characterize both the macroscopic and microscopic deformation behavior of model PMMA/silica nanocomposites. Deformation-induced polymer mobility will be quantified for the first time in these materials. Experimental results will be compared with continuum, mesoscale, and microscopic theoretical approaches. Computer simulations will guide and check the theoretical developments. Key questions to be addressed include: What is the interaction between the intrinsic nanoscale heterogeneity of a polymer glass and the presence of a nanoparticle? For what size nanoparticles do continuum models of the polymer glass fail to describe the experimental behavior? What is the microscopic origin of deformation-induced mobility? What are the dynamics inside a fibril created by crazing? What is the relationship between mechanical and dynamic heterogeneity in polymer glasses? The computational demands of the proposed work are substantial and we will take full advantage of the emerging national cyber infrastructure, including the NSF supported Grid Laboratory of Wisconsin (GLOW). We anticipate that this work will have broad impact in at least two dimensions. New polymer glass nanocomposites are urgently needed to solve vexing manufacturing problems such as the weakness of nanoscale photoresist features created by advanced lithography. Our primary technical goal is to develop tools that, using a minimum of experimental input, can predict the deformation properties of glassy nanocomposites as a function of temperature, thermal history, strain rate, and deformation geometry. Additionally, the PIs will work with a University of Wisconsin-Madison program known as PEOPLE (Pre-college Enrichment Opportunity Program for Learning Excellence) to increase the likelihood that minority and low-income high school students matriculate to colleges and universities. The PIs and our coworkers will provide experiences that will help these students to become scientifically literate citizens and encourage them to consider careers in science and engineering; we will work with teachers of these students in our laboratories and in the development of instructional materials. The PEOPLE program has a proven track record of sending more than 90% of its participants to college.
尽管聚合物玻璃是令人印象深刻的工程材料,但仍有相当大的机会来提高其强度和破坏性能。最近的证据表明,用纳米级颗粒(即纳米复合材料)增强聚合物玻璃可以生产出强度和破坏性能大大提高的材料,并且根据目前的理解,无法以任何其他方式生产。新型玻璃纳米复合材料的系统开发将需要对纳米尺度上的变形过程有一个复杂的理解。我们建议综合运用实验、模拟和理论来发展所需的理解。实验将用于表征模型PMMA/二氧化硅纳米复合材料的宏观和微观变形行为。变形引起的聚合物迁移率将首次在这些材料中被量化。实验结果将与连续体、中尺度和微观理论方法进行比较。计算机模拟将指导和检查理论发展。要解决的关键问题包括:聚合物玻璃的内在纳米尺度非均质性与纳米颗粒的存在之间的相互作用是什么?对于多大尺寸的纳米颗粒,聚合物玻璃的连续模型不能描述实验行为?变形引起的流动性的微观起源是什么?纤维内部的动力是什么?聚合物玻璃的力学非均质性和动力学非均质性之间的关系是什么?拟议工作的计算需求是巨大的,我们将充分利用新兴的国家网络基础设施,包括美国国家科学基金会支持的威斯康星州网格实验室(GLOW)。我们预计这项工作将至少在两个方面产生广泛的影响。新型聚合物玻璃纳米复合材料迫切需要解决令人烦恼的制造问题,如先进光刻技术造成的纳米级光刻胶特性的弱点。我们的主要技术目标是开发工具,使用最小的实验输入,可以预测玻璃纳米复合材料的变形特性,作为温度,热历史,应变速率和变形几何的函数。此外,pi将与威斯康辛大学麦迪逊分校的一个名为PEOPLE的项目合作,以增加少数民族和低收入高中学生进入学院和大学的可能性。pi和我们的同事将提供经验,帮助这些学生成为具有科学素养的公民,并鼓励他们考虑从事科学和工程方面的职业;我们将与这些学生的老师在我们的实验室和教学材料的开发工作。PEOPLE项目在将90%以上的参与者送入大学方面有着良好的记录。

项目成果

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Mark Ediger其他文献

EFFICACY AND SAFETY OF PROPROTEIN CONVERTASE SUBTILISIN/KEXIN TYPE 9 INHIBITORS TREATMENT IN FAMILIAL HYPERCHOLESTEROLEMIA: A COMPREHENSIVE META-ANALYSIS OF ALL RANDOMIZED CLINICAL TRIALS
  • DOI:
    10.1016/s0735-1097(16)31985-4
  • 发表时间:
    2016-04-05
  • 期刊:
  • 影响因子:
  • 作者:
    Armaghan Y. Soomro;Mark Ediger;Bhavi Pandya;Muhammad Rehan Raza;Zaka Khan;Mustafain Meghani;Thomas Vazzana;James Lafferty
  • 通讯作者:
    James Lafferty
Influence of substrate temperature on the transformation front velocities that determine thermal stability of vapor-deposited glasses.
基材温度对决定气相沉积玻璃热稳定性的转变前沿速度的影响。
EFFICACY AND SAFETY OF PROPROTEIN CONVERTASE SUBTILISIN/KEXIN TYPE 9 INHIBITORS TREATMENT ON CHOLESTEROL LEVELS: A COMPREHENSIVE META-ANALYSIS OF ALL RANDOMIZED CLINICAL TRIALS
  • DOI:
    10.1016/s0735-1097(16)31984-2
  • 发表时间:
    2016-04-05
  • 期刊:
  • 影响因子:
  • 作者:
    Armaghan Y. Soomro;Mark Ediger;Bhavi Pandya;Muhammad Rehan Raza;Zaka Khan;Mustafain Meghani;Sarah Tareen;Thomas Vazzana;James Lafferty
  • 通讯作者:
    James Lafferty
Neutron reflectivity measurements of the translational motion of tris(naphthylbenzene) at the glass transition temperature.
三(萘基苯)在玻璃化转变温度下的平移运动的中子反射率测量。
  • DOI:
  • 发表时间:
    2006
  • 期刊:
  • 影响因子:
    4.4
  • 作者:
    S. F. Swallen;Marie K. Mapes;Y. S. Kim;R. McMahon;Mark Ediger;S. Satija
  • 通讯作者:
    S. Satija
Molecular dynamics computer simulation of local dynamics in polyisoprene melts
聚异戊二烯熔体局部动力学的分子动力学计算机模拟
  • DOI:
    10.1016/0032-3861(96)87294-6
  • 发表时间:
    1996
  • 期刊:
  • 影响因子:
    4.6
  • 作者:
    N. Moe;Mark Ediger
  • 通讯作者:
    Mark Ediger

Mark Ediger的其他文献

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{{ truncateString('Mark Ediger', 18)}}的其他基金

In situ Investigations of Physical Vapor Deposition of Organic Glass Formers
有机玻璃成型体物理气相沉积的原位研究
  • 批准号:
    2153944
  • 财政年份:
    2022
  • 资助金额:
    $ 131.9万
  • 项目类别:
    Continuing Grant
Deformation-induced changes in segmental dynamics of polymer glasses prepared by melt stretching and stress aging
熔融拉伸和应力老化制备的聚合物玻璃的变形引起的链段动力学变化
  • 批准号:
    2002959
  • 财政年份:
    2020
  • 资助金额:
    $ 131.9万
  • 项目类别:
    Standard Grant
Using Physical Vapor Deposition to Prepare Unusual Liquids and Unusual Glasses
使用物理气相沉积制备不寻常的液体和不寻常的玻璃
  • 批准号:
    1854930
  • 财政年份:
    2019
  • 资助金额:
    $ 131.9万
  • 项目类别:
    Standard Grant
Influence of Cyclic Loading/Unloading on Segmental Dynamics of Polymer Glasses
循环加载/卸载对聚合物玻璃分段动力学的影响
  • 批准号:
    1708248
  • 财政年份:
    2017
  • 资助金额:
    $ 131.9万
  • 项目类别:
    Standard Grant
Investigation of Vapor-deposited Glasses by Nanocalorimetry and Dielectric Relaxation
通过纳米量热法和介电弛豫研究气相沉积玻璃
  • 批准号:
    1564663
  • 财政年份:
    2016
  • 资助金额:
    $ 131.9万
  • 项目类别:
    Continuing Grant
Molecular mobility during polymer glass deformation
聚合物玻璃变形过程中的分子迁移率
  • 批准号:
    1404614
  • 财政年份:
    2014
  • 资助金额:
    $ 131.9万
  • 项目类别:
    Standard Grant
Dynamics of Vapor-deposited Glasses and Liquids
气相沉积玻璃和液体的动力学
  • 批准号:
    1265737
  • 财政年份:
    2013
  • 资助金额:
    $ 131.9万
  • 项目类别:
    Continuing Grant
Molecular Mobility in Polycarbonate Glasses During Active Deformation
主动变形过程中聚碳酸酯玻璃的分子迁移率
  • 批准号:
    1104770
  • 财政年份:
    2011
  • 资助金额:
    $ 131.9万
  • 项目类别:
    Continuing Grant
Unusually mobile supercooled liquids
异常流动的过冷液体
  • 批准号:
    1012124
  • 财政年份:
    2010
  • 资助金额:
    $ 131.9万
  • 项目类别:
    Continuing Grant
Molecular Mobility in Polymer Glasses Under Stress
应力下聚合物玻璃中的分子迁移率
  • 批准号:
    0907607
  • 财政年份:
    2009
  • 资助金额:
    $ 131.9万
  • 项目类别:
    Standard Grant

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