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.


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 September 23, 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 September 23, 2014).

Share This



More Matter & Energy News

Tuesday, September 23, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Company Copies Keys From Photos

Company Copies Keys From Photos

Newsy (Sep. 22, 2014) A new company allows customers to make copies of keys by simply uploading a couple of photos. But could it also be great for thieves? Video provided by Newsy
Powered by NewsLook.com
Rockefeller Oil Heirs Switching To Clean Energy

Rockefeller Oil Heirs Switching To Clean Energy

Newsy (Sep. 22, 2014) The Rockefellers — heirs to an oil fortune that made the family name a symbol of American wealth — are switching from fossil fuels to clean energy. Video provided by Newsy
Powered by NewsLook.com
Raw: SpaceX Rocket Carries 3-D Printer to Space

Raw: SpaceX Rocket Carries 3-D Printer to Space

AP (Sep. 22, 2014) A SpaceX Rocket launched from Cape Canaveral, carrying a custom-built 3-D printer into space. NASA envisions astronauts one day using the printer to make their own spare parts. (Sept. 22) Video provided by AP
Powered by NewsLook.com
Inside London's Massive Sewer Tunnel Project

Inside London's Massive Sewer Tunnel Project

AP (Sep. 22, 2014) Billions of dollars are being spent on a massive super sewer to take away London's vast output of waste, which is endangering the River Thames. (Sept. 22) Video provided by AP
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