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Plastics


— Good Thinking

Process for laser-welding clear plastics developed

By - February 2, 2011
Laser welding of plastic is quick, precise, and generates little waste, but it does have its limitations. The process involves shining a laser beam through the edge of an upper sheet of plastic and onto the joining edge of a lower sheet, which has had soot particles mixed into it to absorb the radiation – this means that manufacturers are almost always limited to joining transparent plastic to black plastic. Researchers from Germany’s Fraunhofer Institute for Laser Technology, however, have recently developed a method for welding transparent plastics to one another. Read More
— Science

New packaging would indicate when food is spoiled

By - January 13, 2011
Given that German scientists have already developed packaging film that kills food-inhabiting bacteria, it only makes sense that Scottish scientists should be developing the next step in the process – food packaging that changes color when the food is going bad. The “intelligent plastic” film, which is being created at Glasgow’s University of Strathclyde, is intended to take the guesswork out of whether or not the food packaged within it is still safe to eat. Read More
— Science

Scientist developing self-healing biorenewable polymers

By - January 11, 2011
Materials that can repair themselves are generally a good thing, as they increase the lifespan of products created from them, and reduce the need for maintenance. Biorenewable polymers are also pretty likable, as they reduce or even eliminate the need for petroleum products in plastic production, replacing them with plant-derived substances. Michael Kessler, an Iowa State University associate professor of materials science and engineering, and an associate of the U.S. Department of Energy’s Ames Laboratory, is now attempting to combine the two. Read More
— Architecture

Recycled plastic housing resists earthquakes, hurricanes, rot, insects and mould

By - January 10, 2011 8 Pictures
Each year natural disasters and civil unrest leave hundreds of thousands of people homeless throughout the world. Many of these crises occur in developing nations where traditional building materials are either unavailable or prohibitively expensive, and where the focus is often on staying alive, not maintenance of a home. The ECO:Shield system from Innovative Composites International Inc. (ICI) may present a welcome solution. The earthquake and hurricane resistant houses use recyclable materials and according to ICI, are cheaper than both conventional and other modular constructions. They are energy efficient and durable – resisting moisture, insects, rot and mould. And they can be constructed quickly using unskilled labor: an 8' x 16' (2.4 x 4.9 meters) ECO:Shield house can be assembled in less than 45 minutes with standard tools. Read More
— Environment

CO2 could be used in 'green' plastic production

By - January 4, 2011
Excess carbon dioxide in the atmosphere has certainly become an environmental concern in recent years, but researchers from Germany’s Fraunhofer Institute for Environmental, Safety and Energy Technology are now experimenting with a process that uses CO2 to process plastic products in an environmentally-friendly fashion. They have discovered that by compressing the gas, it can be used to impregnate plastic objects with dyes, antibacterial compounds, or other substances. Traditionally, toxic solvents have been used for coloring plastic items. Read More
— Science

Man-made muscle fibers help scientists understand strain on plastics

By - December 23, 2010
Scientists tasked with creating better plastic films have been at a loss when it comes to observing how synthetic polymers react under mechanical stress – the polymers are just too small for a microscope to keep track of while being stretched. Now a team of physicists from Technische Universitaet Muenchen (TUM) has come up with a solution. They’re using a muscle filament protein to build polymer networks that can be observed by a microscope, and by doing so have already determined why some polymers get tougher with repeated stress, while others get softer. Read More
— Automotive

GM to recycle used Gulf of Mexico oil booms into parts for Volt

By - December 21, 2010 2 Pictures
During the course of this year’s Gulf Oil Spill, a lot of media attention was paid to the oil booms used to contain and/or absorb the surface slick. While a small percentage of the sausage-shaped tubes of netting were stuffed with unusual materials such as hair, most of them contained oil-absorbent polypropylene. Now that the Deep Horizon well has been capped, the question of what to do with all that oily plastic arises. It turns out that some of it will find its way into Chevrolet Volts. Read More
— Science

Making tougher biodegradable plastics from plants

By - November 18, 2010
Replacing petro-chemical-based plastics with plant-based alternatives is a growing area of research. One popular form of plant-derived plastic is Poly(lactic) acid, or PLA, a type of biodegradable plastic that is currently used to make bottles, bags and is woven into fibers to make clothes in place of polyester. Although PLA has similar mechanical properties to PETE polymer, it has significantly lower heat-resistance, which limits its uses. Researchers are now developing a new chemical catalyst to improve the properties of PLA, making it stronger and more heat-resistant so it can be used for a wider range of applications. Read More
— Science

Engineering plants to make plastics

By - November 10, 2010
Modern society's reliance on fossil fuel extends past its use as an energy source with by-products used in everything from plastics to lubricants and fertilizers. Seeking alternatives that are cleaner to produce and renewable is important for the continuation of life as we know it. This is why researchers the the U.S Department of Energy (DOE) are are engineering plants to produce chemicals needed for plastics that have traditionally come from fossil fuels. Read More
— Electronics

Plastic/metal composite material is able to monitor itself

By - October 19, 2010
When engineers want to know how much stress mechanical components such as wind turbine blades or machine parts are subjected to, they usually do so via a series of sensors. These sensors are typically either built into components, or are glued onto them. A new polymer-metal composite material developed at Germany’s Fraunhofer Institute for Manufacturing Technology and Applied Material Research (IFAM), however, may be about to change that – components made from the material are reportedly able to act as their own sensors. Read More
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