Featured Research

from universities, journals, and other organizations

Patented Technique Makes For Tougher Heat-Resistant Plastics

Date:
September 21, 2000
Source:
Ohio State University
Summary:
Tough, heat-resistant plastics may soon find their way into car and airplane engines as a result of research at Ohio State University. Scientists here have patented a method of mixing plastic with silica to create a material three to four times tougher than the plastic alone.

COLUMBUS, Ohio - Tough, heat-resistant plastics may soon find their way into car and airplane engines as a result of research at Ohio State University.

Scientists here have patented a method of mixing plastic with silica to create a material three to four times tougher than the plastic alone.

Plastic engine parts would mean lighter, more fuel-efficient cars and airplanes, but today's heat-resistant plastics aren't tough enough -- they shatter at the smallest impact, said John Lannutti, associate professor of materials science and engineering at Ohio State.

The new composite material is tougher than plastic alone because it divides the force of an impact into many small interactions involving millions of individual silica particles.

"We think that as a crack starts traveling through the composite, it breaks up into finer and finer cracks, until the material has dissipated the energy of the impact," Lannutti said.

Lannutti developed the method of producing these materials with Robert Seghi, associate professor of restorative and prosthetic dentistry at Ohio State, and graduate student Jiazhong Luo. Their goal, at first, was to create tough plastic dental fillings.

After moderate success -- they created a plastic that was about as good as today's standard fillings -- Lannutti tried the technique with a different kind of plastic for Ohio Aerospace Institute member BFGoodrich Co.

BFGoodrich supplied plastic powder for Lannutti's experiments, and will manufacture parts containing this silica for further testing.

annutti and his colleagues call the method "synergistic toughening," or "toughening across scales," because it strengthens material down to the scale of the individual particles.

The silica particles they use are only 50 nanometers wide -- about 100 times smaller than the width of a human hair -- and each particle contains a host of even smaller pores that measure only a couple of nanometers across.

What makes the patented manufacturing method unique is that the researchers force melted plastic to fill these tiny pores, creating a strong bond between atoms of silica and plastic over a large surface area.

"So basically we can create toughness that starts at the nanoscale," said Lannutti.

Eventually consumers may one day find more plastic parts under their car hoods, or on a commercial airplane wing -- places where iron, steel, and aluminum are used today, Lannutti said. Sooner than that, though, military aircraft will probably take advantage of the technology.

It was military testing of parts made with heat-resistant plastic and reinforced with graphite fiber that uncovered the need for tougher plastics.

Impacts such as a bird flying into an airplane wing, or even a wrench falling onto a part, would shatter the plastic and leave behind only the woven graphite fibers, Lannutti said.

Still, the brittle plastic's tolerance of temperatures up to 800F makes it ideal for parts surrounding hot jet engines.

In laboratory tests, the plastic-silica composite material retained the heat-resistance of fiber-reinforced plastics, but improved resistance to impacts by four to five times.

Lannutti said the new composite isn't as hard as steel, but displays good heat resistance at a fraction of the weight of steel.


Story Source:

The above story is based on materials provided by Ohio State University. Note: Materials may be edited for content and length.


Cite This Page:

Ohio State University. "Patented Technique Makes For Tougher Heat-Resistant Plastics." ScienceDaily. ScienceDaily, 21 September 2000. <www.sciencedaily.com/releases/2000/09/000921072508.htm>.
Ohio State University. (2000, September 21). Patented Technique Makes For Tougher Heat-Resistant Plastics. ScienceDaily. Retrieved October 22, 2014 from www.sciencedaily.com/releases/2000/09/000921072508.htm
Ohio State University. "Patented Technique Makes For Tougher Heat-Resistant Plastics." ScienceDaily. www.sciencedaily.com/releases/2000/09/000921072508.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

Thanks, Marty McFly! Hoverboards Could Be Coming In 2015

Thanks, Marty McFly! Hoverboards Could Be Coming In 2015

Newsy (Oct. 21, 2014) If you've ever watched "Back to the Future Part II" and wanted to get your hands on a hoverboard, well, you might soon be in luck. Video provided by Newsy
Powered by NewsLook.com
Robots to Fly Planes Where Humans Can't

Robots to Fly Planes Where Humans Can't

Reuters - Innovations Video Online (Oct. 21, 2014) Researchers in South Korea are developing a robotic pilot that could potentially replace humans in the cockpit. Unlike drones and autopilot programs which are configured for specific aircraft, the robots' humanoid design will allow it to fly any type of plane with no additional sensors. Ben Gruber reports. Video provided by Reuters
Powered by NewsLook.com
Graphene Paint Offers Rust-Free Future

Graphene Paint Offers Rust-Free Future

Reuters - Innovations Video Online (Oct. 21, 2014) British scientists have developed a prototype graphene paint that can make coatings which are resistant to liquids, gases, and chemicals. The team says the paint could have a variety of uses, from stopping ships rusting to keeping food fresher for longer. Jim Drury reports. Video provided by Reuters
Powered by NewsLook.com
China Airlines Swanky New Plane

China Airlines Swanky New Plane

Buzz60 (Oct. 21, 2014) China Airlines debuted their new Boeing 777, and it's more like a swanky hotel bar than an airplane. Enjoy high-tea, a coffee bar, and a full service bar with cocktails and spirits, and lie-flat in your reclining seats. Sean Dowling (@SeanDowlingTV) has the details. Video provided by Buzz60
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