Navigation Links
New theory may shed light on dynamics of large-polymer liquids
Date:8/23/2011

CHAMPAIGN, Ill. A new physics-based theory could give researchers a deeper understanding of the unusual, slow dynamics of liquids composed of large polymers. This advance provides a better picture of how polymer molecules respond under fast-flow, high-stress processing conditions for plastics and other polymeric materials.

Kenneth S. Schweizer, the G. Ronald and Margaret H. Professor of materials science and engineering at the University of Illinois, and graduate student Daniel Sussman published their findings in the journal Physical Review Letters.

"This is the first microscopic theory of entangled polymer liquids at a fundamental force level which constructs the dynamic confinement potential that controls slow macromolecular motion," said Schweizer, who also is a professor of chemistry and of chemical and biomolecular engineering and is affiliated with the Frederick Seitz Materials Research Laboratory at the U. of I. "Our breakthrough lays the foundation for an enormous amount of future work relevant to both the synthetic polymers of plastics engineering and the biopolymers relevant to cell biology and mechanics."

Polymers are long, large molecules that are ubiquitous in biology, chemistry and materials, from the stiff filaments that give cells their structure to plastics. Linear polymers fall into two classes: rigid rods like uncooked spaghetti or flexible strands like al dente noodles.

When in a dense solution, linear polymers become entangled like spaghetti in a pot, intertwining and crowding each other. Each polymer is hemmed in by its neighbors, so that the liquid behaves like an elastic, viscous rubber. Given enough time, the liquid will eventually flow slowly as polymers crawl along like snakes, a movement called reptation. Researchers have long assumed that each polymer's reptation is confined to a tube-shaped region of space, like a snake slithering through a pipe, but have had difficulty understanding
'/>"/>

Contact: Liz Ahlberg
eahlberg@illinois.edu
217-244-1073
University of Illinois at Urbana-Champaign
Source:Eurekalert  

Page: 1 2

Related biology news :

1. Revised theory suggests carbon dioxide levels already in danger zone
2. Scientists present moving theory behind bacterial decision-making
3. No place like home: New theory for how salmon, sea turtles find their birthplace
4. Nearly a century later, new findings support Warburg theory of cancer
5. Rethinking the genetic theory of inheritance
6. Researchers disprove 15-year-old theory about the nervous system
7. Clarke clarifies pattern recognition theory
8. Rumbaughs theory links positions of Wilson, Skinner
9. MS study offers theory for why repair of brains wiring fails
10. New theory gives more precise estimates of large-scale biodiversity
11. New theory on why male, female lemurs same size
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
New theory may shed light on dynamics of large-polymer liquids
(Date:12/19/2014)... 2014 Research and Markets ( ... "iPhone 5S Fingerprint Sensor - Apple/AuthenTec TMDR92 ... their offering. http://photos.prnewswire.com/prnh/20130307/600769 ... in July 2012, Apple introduced the fingerprint reading ... the only device of Apple incorporating such a ...
(Date:12/19/2014)... 2014  23andMe, Inc., the leading personal genetics company, ... fine-scale differences in genetic ancestry of individuals from across ... Since immigrants first arrived more than four hundred years ... served as a meeting place for peoples from different ... ongoing mixing of peoples with African, European, and American ...
(Date:12/17/2014)... Research and Markets ( http://www.researchandmarkets.com/research/s6qzt5/samsung_galaxy_s5 ... "Samsung Galaxy S5 - Home Button Synaptics Fingerprint ... http://photos.prnewswire.com/prnh/20130307/600769 ... than the iPhone 5S, Samsung introduces for the ... The Galaxy S5 home button presents ...
Breaking Biology News(10 mins):iPhone 5S Fingerprint Sensor - Apple/AuthenTec TMDR92 & Sapphire - Technology Report 223andMe Study Sketches Genetic Portrait of the United States 223andMe Study Sketches Genetic Portrait of the United States 323andMe Study Sketches Genetic Portrait of the United States 4Samsung Galaxy S5 - Home Button Synaptics Fingerprint Sensor Technology Analysis 2
... Northwest National Laboratory scientists have used electrostatic attraction ... carbon nanotubes. , This configuration can accommodate ... monitoring to infectious-agent detection, said Yuehe Lin, who ... campus' W.R. Wiley Environmental Molecular Sciences Laboratory. ...
... a vaccine designed to fight avian influenza will begin this ... is part of a multicenter trial that will test a ... whether the vaccine still triggers a strong immune response at ... the National Institute of Allergy and Infectious Diseases of the ...
... online today in the journal Nature Methods, researchers at ... powerful new tool that will facilitate genetic research and ... genetic disease. , The researchers have combined several ... lentiviral vector ?a gene delivery system partly derived from ...
Cached Biology News:A biosensor layered like lasagna 2Duke to test bird flu vaccine dosing 2Swiss researchers develop all-in-one remote control gene expression tool 2
(Date:12/24/2014)... St. Louis, Missouri (PRWEB) December 23, 2014 ... and targeting Swiss biotechnology company, Syngenta, are in the ... for pretrial proceedings. The consolidated case is In Re: ... in the U.S. District Court for the District of ... litigation (MDL) has been handed over to U.S. District ...
(Date:12/24/2014)... The report provides basic ... definition, classification, application and industry overview. This ... and product cost structure. Production is separated ... also covers upstream raw materials, equipment, downstream ... and proposals. In the end, the export ...
(Date:12/24/2014)... Vermillion, Inc. (Nasdaq:   VRML), a ... today that investors including Oracle Investment Management, ... several Vermillion directors have agreed to purchase approximately ... stock and warrants to purchase unregistered shares of ... Under the terms of the private ...
(Date:12/22/2014)... 22, 2014 The Center for ... of technical training across the life sciences industry, has ... (SCDM) to provide the organization's members with discounted ... access to the more than 350 sessions across 80 ... 10% off when registering for a public course ...
Breaking Biology Technology:Carey Danis & Lowe Reports on Syngenta GMO Corn Transfer Order 2Worldwide Methyl Mercaptan Market 2015-2020 Forecasts on Development & Trends Now Available at ReportsnReports.com 2Vermillion Announces Equity Financing of up to $18.9 Million; Suspends ATM Program 2Vermillion Announces Equity Financing of up to $18.9 Million; Suspends ATM Program 3Vermillion Announces Equity Financing of up to $18.9 Million; Suspends ATM Program 4Vermillion Announces Equity Financing of up to $18.9 Million; Suspends ATM Program 5CfPIE Announces Partnership with the Society for Clinical Data Management 2CfPIE Announces Partnership with the Society for Clinical Data Management 3
... , , BRUSSELS, December 14 ... Assessing the Lifestyles of,Women With Rheumatoid Arthritis in Seven Major Industrialized Countries , , ... disease, impacts their enjoyment of the festive season, ... preparing holiday food, writing cards and wrapping presents most, ...
... have discovered a new explanation for differences in the severity of ... gene, the more serious the handicap. The genetic defect is situated ... amount of copies of the GDI1 gene that is responsible. The ... Genetics , and are the result of work by the group ...
... , , DAVIS, Calif., Dec. 11 ... to its executive management team. Mr. Chris Hildreth joined ... is responsible for expanding all commercial aspects of the ... Kin Sing (Ray) Lam joined MBI as Vice President ...
Cached Biology Technology:Rheumatoid Arthritis Patients Want Pain-Free Days at Christmas 2Rheumatoid Arthritis Patients Want Pain-Free Days at Christmas 3Rheumatoid Arthritis Patients Want Pain-Free Days at Christmas 4Amount of gene surplus determines severity of mental retardation in males 2Marrone Bio Innovations Announces Two New Executive Appointments 2Marrone Bio Innovations Announces Two New Executive Appointments 3
... assay system offers the following ... for batch-processing systems, Long lasting ... microplates such as 384-well and ... storage conditions ( 2 - ...
Functionally tested for consistent G-banding of chromosomes....
...
Schneider's Drosophila Medium is formulated for the expression of heterologous proteins in Drosophila S2 cells....
Biology Products: