Experimental and Theoretical Studies of Concentrated PolymerSolutions in Strong Flows
强流中浓聚合物溶液的实验和理论研究
基本信息
- 批准号:9114280
- 负责人:
- 金额:$ 38.85万
- 依托单位:
- 依托单位国家:美国
- 项目类别:Continuing grant
- 财政年份:1992
- 资助国家:美国
- 起止时间:1992-01-15 至 1995-12-31
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
A critical need exists to develop the technology that will allow processing polymers at faster speeds and that will result in polymeric materials with higher degrees of molecular orientation. Such advances will make existing processes more competitive and will increase the prospects for manufacturing valuable new products. It is likely that these goals can be reached if experimental techniques for studying polymers at high strain rates are improved and the resulting information is used to develop a microscopic understanding of how polymer liquids flow. This project is intended to provide this fundamental knowledge. It describes experimental research work on the molecular and fluid mechanics of polymeric liquids subjected to flow types that contain a mixture of shear and extension typically found in commercial processing operations. The experiments will investigate, using a range of techniques, the most important parameters affecting the rheological response: entanglement density and molecular-weight distribution. A data base of this type on materials that have well-characterized molecular structures is the necessary starting point. The molecular understanding so obtained will be used to continue the development of models described in the project. The ultimate goal is to have a detailed understanding of the highly nonlinear response that exits under these conditions and to use this information to devise new processing procedures that will optimize the macroscopic properties of polymers. This research is jointly supported by the Polymers Program in the Division of Materials Research and the Fluid, Particulate and Hydraulic Systems Program of the Division of Chemical and Thermal Systems.
迫切需要开发一种技术, 以更快的速度处理聚合物,这将导致 具有较高分子取向度的聚合物材料。 这些进步将使现有的工艺更具竞争力, 将增加制造有价值的新产品的前景, 产品. 这些目标有可能实现,如果 高应变率下研究聚合物的实验技术 并将由此产生的信息用于制定 聚合物液体如何流动的微观理解。 这 该项目旨在提供这些基本知识。 它 描述了分子和流体的实验研究工作 聚合物液体的力学受到流动类型, 剪切和延伸的混合物通常在商业中发现, 处理操作。 实验将使用 一系列的技术,最重要的参数影响 流变学响应:缠结密度和分子量 分布 这种类型的资料库, 良好表征的分子结构是研究 点 由此获得的分子理解将用于 继续开发项目中描述的模型。 的 最终目标是要有一个详细的了解高度 在这些条件下存在的非线性响应,并使用 设计新的处理程序, 优化聚合物的宏观性能。 这项研究是由聚合物计划联合支持, 材料研究与流体、颗粒和 化工与热工系液压系统项目 系统.
项目成果
期刊论文数量(0)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
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L. Gary Leal其他文献
Flow-aligning and tumbling in small-molecule liquid crystals: pure components and mixtures
小分子液晶中的流动排列和翻滚:纯组分和混合物
- DOI:
- 发表时间:
1999 - 期刊:
- 影响因子:0
- 作者:
D. Ternet;Ronald G. Larson;L. Gary Leal - 通讯作者:
L. Gary Leal
On the dynamics of suspended microstructure in unsteady, spatially inhomogeneous, two-dimensional fluid flows
关于不稳定、空间不均匀、二维流体流动中悬浮微观结构的动力学
- DOI:
- 发表时间:
1991 - 期刊:
- 影响因子:3.7
- 作者:
Andrew J. Szeri;S. Wiggins;L. Gary Leal - 通讯作者:
L. Gary Leal
Transient director patterns upon flow start-up of nematic liquid crystals (an explanation for stress oscillation damping)
- DOI:
10.1007/s003970000155 - 发表时间:
2001-07-01 - 期刊:
- 影响因子:3.000
- 作者:
Dennis J. Ternet;Ronald G. Larson;L. Gary Leal - 通讯作者:
L. Gary Leal
Adsorption energies of poly(ethylene oxide)-based surfactants and nanoparticles on an air-water surface.
聚环氧乙烷表面活性剂和纳米粒子在空气-水表面的吸附能。
- DOI:
10.1021/la404233a - 发表时间:
2014 - 期刊:
- 影响因子:0
- 作者:
Zachary A. Zell;L. Isa;P. Ilg;L. Gary Leal;Todd M. Squires - 通讯作者:
Todd M. Squires
L. Gary Leal的其他文献
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{{ truncateString('L. Gary Leal', 18)}}的其他基金
UNS: The Effect of Flow-Induced Concentration Inhomogeneities on the Flow of Polymer Solutions
UNS:流动引起的浓度不均匀性对聚合物溶液流动的影响
- 批准号:
1510333 - 财政年份:2015
- 资助金额:
$ 38.85万 - 项目类别:
Standard Grant
U.S. participation in the IUTAM Symposium on "Mobile particulate systems: kinematics, rheology and phenomena" Bangalor, India, January 23-27, 2012
美国参加 IUTAM 研讨会“移动颗粒系统:运动学、流变学和现象”,印度班加罗尔,2012 年 1 月 23 日至 27 日
- 批准号:
1147517 - 财政年份:2011
- 资助金额:
$ 38.85万 - 项目类别:
Standard Grant
GOALI: Vesicle Dynamics: The Transition From Unilamellar to Multilamellar Structures
目标:囊泡动力学:从单层结构到多层结构的转变
- 批准号:
0968105 - 财政年份:2010
- 资助金额:
$ 38.85万 - 项目类别:
Standard Grant
Nanoparticles as Surfactants: Static and Dynamic Properties
纳米颗粒作为表面活性剂:静态和动态特性
- 批准号:
0932259 - 财政年份:2009
- 资助金额:
$ 38.85万 - 项目类别:
Standard Grant
"The Effects of Finite Concentration and Surfactants on the Coalescence of Drops in Flow"
“有限浓度和表面活性剂对流动中液滴聚结的影响”
- 批准号:
0624446 - 财政年份:2006
- 资助金额:
$ 38.85万 - 项目类别:
Standard Grant
Viscoelastic and Surfactant Effects on the Deformation, Breakup and Coalescence of Drops in Flow
粘弹性和表面活性剂对流动液滴变形、破碎和聚结的影响
- 批准号:
0206666 - 财政年份:2002
- 资助金额:
$ 38.85万 - 项目类别:
Continuing grant
Studies of Entangled Polymers Under Strong Flow Conditions
强流动条件下缠结聚合物的研究
- 批准号:
0089124 - 财政年份:2000
- 资助金额:
$ 38.85万 - 项目类别:
Continuing Grant
The Mechanics of Complex Fluids: Drop Breakup, Coalescence and Multiparticle Dynamics in Viscoalastic Liquids
复杂流体力学:粘弹性液体中的液滴破碎、聚结和多粒子动力学
- 批准号:
9970567 - 财政年份:1999
- 资助金额:
$ 38.85万 - 项目类别:
Continuing grant
Experimental and Theoretical Studies of Polymeric Liquids in Extension-Dominated Fluids
延伸主导流体中聚合物液体的实验和理论研究
- 批准号:
9700034 - 财政年份:1997
- 资助金额:
$ 38.85万 - 项目类别:
Continuing Grant
The Mechanics of Complex Fluids: Drop Breakup and Shear Induced Diffusion Effects in NonNewtonian Fluids
复杂流体力学:非牛顿流体中的液滴破裂和剪切诱导扩散效应
- 批准号:
9523238 - 财政年份:1996
- 资助金额:
$ 38.85万 - 项目类别:
Continuing grant
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