Recycling Composite Materials

Composite materials, known for their durability, high strength, excellent quality, low maintenance, and low weight, are widely being used in automotive, construction, transport, aerospace and renewable energy industries. Their use in  numerous  engineering applications is a result of the edge composites provides over traditional materials. Recycling and disposal of composite materials is an issue that is being increasingly addressed, as it should with any widely used material. Previously, there were very limited commercial recycling operations for mainstream composite materials due to technological and economic constraints but RD activities are on the rise. Recycling Fiberglass Fiberglass is a versatile material that provides  tangible  potential over conventional materials such as wood, aluminum, and steel. Fiberglass is produced by using less energy and is used in products which result in fewer carbon emissions. Fiberglass offers advantages of being light weight yet has high mechanical strength, impact resistant, is chemical, fire and corrosion resistant, and a good thermal and electrical insulator. Even though fiberglass is extremely useful for the reasons previously listed, an end of life solution is needed. Current FRP composites with thermoset resins do not biodegrade. For many applications where fiberglass is used, this is a good thing. However, in landfills, this is not.   Research has lead to methods such as grinding, incineration, and pyrolysis being used for recycling fiberglass. The recycled fiberglass finds its way in various industries and can be used in various end products. For instance, recycled fibers have been effective in reducing shrinkage in concrete thereby increasing its durability. This concrete can be used best in freezing temperate zones for concrete floors, pavements, sidewalks, and curbs. Other uses for recycled fiberglass include being used as a filler in resin, which can increase  mechanical  properties in certain applications. Recycled fiberglass has also found its use together with other products such as recycled tire products, plastic wood products, asphalt, roofing tar and cast polymer  countertops. Recycling Carbon Fiber Carbon fiber composite materials are ten times stronger than steel and eight times that of aluminum, along with being much lighter than both materials. Carbon fiber composites have found their way into the manufacturing of aircraft and spacecraft parts, automobile springs, golf club shafts, racing car bodies, fishing rods, and more. With the current annual worldwide carbon fiber consumption being at 30,000 tons, most waste goes to the landfill. Research has been conducted to extract the high-value carbon fiber from end-of-life components and from manufacturing scrap, with the goal to use them for creating other carbon fiber composites. Recycled carbon fibers are used in bulk molding compounds for smaller, nonload-bearing components, as a sheet-molding compound and as recycled materials in load-bearing shell structures. The recycled carbon fiber is also finding uses in phone cases, laptop shells and even water bottle cages for bicycles. Future of Recycling Composite Materials Composite materials are preferred for many engineering applications because of its durability and superior strength. Proper waste disposal and recycling at the end of the useful life of composite materials is necessary.  Many current and future waste management and environmental legislation will mandate engineering materials to be properly recovered and recycled, from products such as automobiles, wind turbines, and aircraft that have lived their useful life. Although many technologies have been developed such as mechanical recycling, thermal recycling, and chemical recycling; they are on the brink of being fully commercialized. Extensive research and development are being done to develop better recyclable composites and recycling technologies for composite materials. This will contribute to the sustainable development of composites industry.

Common French Mistake Explained Ces vs. Ses

Ces (these) and ses (his, her, its) are homophones, so no one would ever know if you mixed them up when speaking. Writing, however, is another matter. Whether out of ignorance or carelessness, its easy* to confuse ces and ses but its just as easy to figure out which one is correct. All you have to do is think about what youd say if the noun were singular, since the singular adjectives are not homophones. For example: Il a perdu (ces/ses  ?) clà ©s. While both possibilities are grammatically and logically correct, which one to use depends on what youre trying to express. If clà © were singular, would you use cette (the singular demonstrative adjective) or sa (the singular possessive adjective)? The answer to that makes it crystal clear whether you want to write ces (plural demonstrative) or ses (plural possessive): l a perdu cette clà © (He lost this key) Il a perdu ces clà ©s (He lost these keys)Il a perdu sa clà © (He lost his key) Il a perdu ses clà ©s (He lost his keys

The Bad Influences of Television Free Essays

Let’s admit it. We love watching television. In fact, we love it so much that we can spend hours just sitting in front of our small boxes just to get our dose of must-see TV. We will write a custom essay sample on The Bad Influences of Television or any similar topic only for you Order Now Television offers us all kinds of things to keep our eyes glued to the small screen such as late night talk shows, hit comedy sitcoms, and games shows that keep you guessing which briefcase contains a million dollars. With all the hours we spend on watching television, there is no doubt that somehow it has influenced us somehow. Although that it can influence attitudes of adults, older audiences can discard certain themes since we already have our own preferences. However, television can be a very dangerous influence to young children who are still developing their brains. This paper shall discuss the negative influences of television on children and how these problems can be solved. Sex is a common problem that parents encounter with television. Some shows usually have sexual themes that are not suitable for young audiences. These images may stay with the child as they grow up and lead them to become sexually active in a very early age. Since they do not have adequate information about sex in early ages, this can cause a child to become pregnant or get infected with STDs. Aside from seeing these images, television shows may also have scenes wherein the characters are discussing sex. This is just as dangerous as seeing these images for they can also affect the child by making them more curious about what the characters are talking about. To give you an idea how violence can be a great influence on children, American viewers see an average of â€Å"200,000 acts of violence before they reach the age of 18† (How TV affects your Child) and this can be a very serious problem in the future if it is not addressed properly. Violence on television causes some problems such as emulating the images they see, traumatic stress on the child, and loss of sympathy to those who are suffering. Protagonists in TV shows have great influence on children. Whenever children see their favorite superhero kicking or punching the â€Å"bad guy† and save eventually â€Å"saving the day† they will think that these actions are correct as long as the superhero does it. Aside from suggesting violent actions to children, children may imitate these actions for fun because they would imagine themselves as these superheroes. Aside from causing children to imitate violent actions, these images may also cause trauma to a child. Frightening images of monsters may have some traumatic side effects on children since they still cannot distinguish the difference between the real world and a fictional one. Finally, watching too much violence on television can lead to a loss of sympathy towards people who are suffering. Just like an antagonist who fails in the end of the show, children would think that those who are suffering deserve it since they have done something bad before. Finally obesity is another problem that parents may face with television. TV can cause children to reduce their time to play and exercise since they will be sitting down for hours. Aside from becoming very passive, children usually tend to have snacks while watching due to the commercial of the famous brand potato chips they just saw. So not only will they lack exercise, children will also begin to eat kinds of food that do not have any nutritional value, which is a very important factor in growing up. Aside from obesity, television can also cause a child to become anti-social since they would usually spend more hours watching rather than interacting or playing with others. As we have seen in this paper, television can be a very dangerous influence on children. However, there are things that we can do solve this dilemma. First of all, parents need to always monitor what their children are watching. This will allow the parent to keep their child from watching shows that are inappropriate for their age. Parents should also be familiar with the shows that their children are watching so they could see immediately whether or not their child can watch the show. Parents should also reason out to the child whenever they are watching television. They need to explain to their child the images they see on television to prevent them from imitating these images or seeing them in the wrong light. Works Cited â€Å"How TV affects your child. † KidsHealth. org. 20 Sept. 2007 http://www. kidshealth. org/parent/positive/family/tv_affects_child. html â€Å"Facts and Statistics. † Parentstv. org. 20 Sept. 2007 http://www. parentstv. org/PTC/facts/mediafacts. asp How to cite The Bad Influences of Television, Papers