Featured Research

from universities, journals, and other organizations

Scaling up polymer blobs

Date:
September 27, 2012
Source:
Springer Science+Business Media
Summary:
Several new simulations performed on polymers outline their scaling-up behavior at extreme limits where it depends on their density and length.

Scientists use simulations to test the limits of their object of study -- in this case thin films of polymers -- to extremes of scale. In a study about to be published in EPJ E, Nava Schulmann, a researcher at Strasbourg University, France, and colleagues use a well-known model capable of providing information on heat and mechanical energy exchange between these polymer chains. They found that polymer blends confined to ultrathin two-dimensional films displayed enhanced compatibility. This was made possible by simulations using a fairly standard model, which is simple enough to allow the efficient computation of dense large-chain systems.

The authors focused on making simulations of self-avoiding and highly flexible polymer chains without chain intersections. To do so, they varied the level of polymer density, as well as their chain length, while using numerical methods to arrive at a universal view of polymer behaviour.

Thanks to molecular dynamics and so-called Monte Carlo simulations, they confirmed that such polymers adopt a scaling behaviour following a power law as a function of density and chain length. This scaling behaviour applies, for example, to polymer pressure and, hence, polymer compressibility. French Nobel laureate Pierre-Giles de Gennes predicted this property in his so-called blob picture approach. Accordingly, a polymer chain is akin to a succession of blobs, like beads in a necklace.

Schulmann and colleagues focused on a regime relevant for applications, referred to as a semi-dilute regime. There, scaling occurs more universally as long as the initial blob size is well defined. Understanding the limit of a system of long chains can currently only be realised in simulations of simplified models. However, the authors hope their findings will facilitate the work of polymer experimentalists.²


Story Source:

The above story is based on materials provided by Springer Science+Business Media. Note: Materials may be edited for content and length.


Journal Reference:

  1. N. Schulmann, H. Xu, H. Meyer, P. Polińska, J. Baschnagel, J. P. Wittmer. Strictly two-dimensional self-avoiding walks: Thermodynamic properties revisited. The European Physical Journal E, 2012; 35 (9) DOI: 10.1140/epje/i2012-12093-x

Cite This Page:

Springer Science+Business Media. "Scaling up polymer blobs." ScienceDaily. ScienceDaily, 27 September 2012. <www.sciencedaily.com/releases/2012/09/120927091621.htm>.
Springer Science+Business Media. (2012, September 27). Scaling up polymer blobs. ScienceDaily. Retrieved October 22, 2014 from www.sciencedaily.com/releases/2012/09/120927091621.htm
Springer Science+Business Media. "Scaling up polymer blobs." ScienceDaily. www.sciencedaily.com/releases/2012/09/120927091621.htm (accessed October 22, 2014).

Share This



More Matter & Energy News

Wednesday, October 22, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Chameleon Camouflage to Give Tanks Cloaking Capabilities

Chameleon Camouflage to Give Tanks Cloaking Capabilities

Reuters - Innovations Video Online (Oct. 22, 2014) — Inspired by the way a chameleon changes its colour to disguise itself; scientists in Poland want to replace traditional camouflage paint with thousands of electrochromic plates that will continuously change colour to blend with its surroundings. The first PL-01 concept tank prototype will be tested within a few years, with scientists predicting that a similar technology could even be woven into the fabric of a soldiers' clothing making them virtually invisible to the naked eye. Matthew Stock reports. Video provided by Reuters
Powered by NewsLook.com
Jet Sales Lift Boeing Profit 18 Pct.

Jet Sales Lift Boeing Profit 18 Pct.

Reuters - Business Video Online (Oct. 22, 2014) — Strong jet demand has pushed Boeing to raise its profit forecast for the third time, but analysts were disappointed by its small cash flow. Fred Katayama reports. Video provided by Reuters
Powered by NewsLook.com
Internet of Things Aims to Smarten Your Life

Internet of Things Aims to Smarten Your Life

AP (Oct. 22, 2014) — As more and more Bluetooth-enabled devices are reaching consumers, developers are busy connecting them together as part of the Internet of Things. (Oct. 22) Video provided by AP
Powered by NewsLook.com
What Is Magic Leap, And Why Is It Worth $500M?

What Is Magic Leap, And Why Is It Worth $500M?

Newsy (Oct. 22, 2014) — Magic Leap isn't publicizing much more than a description of its product, but it’s been enough for Google and others to invest more than $500M. Video provided by Newsy
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
 
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:  

Breaking News:

Strange & Offbeat Stories

 

Space & Time

Matter & Energy

Computers & Math

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:  

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile iPhone Android Web
Follow Facebook Twitter Google+
Subscribe RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins