Hi am Mohamed i would like to get details on advantages and disadvantages of plastic in tamil language ..My friend Justin said advantages and disadvantages of plastic in tamil language will be available here and now i am living at Tamilnadu/Thanjavur and i last studied in the college/school Venkateswara and now am doing Hardware Engineer i need help on tamil ppt etc
Plastic is a material consisting of any of a wide range of synthetic or semi-synthetic organic compounds that are malleable and can be molded into solid objects. Plastics are typically organic polymers of high molecular mass, but they often contain other substances. They are usually synthetic, most commonly derived from petrochemicals, but many are partially natural. Plasticity is the general property of all materials that are able to irreversibly deform without breaking, but this occurs to such a degree with this class of moldable polymers that their name is an emphasis on this ability.
Due to their relatively low cost, ease of manufacture, versatility, and imperviousness to water, plastics are used in an enormous and expanding range of products, from paper clips to spaceships. They have already displaced many traditional materials, such as wood, stone, horn and bone, leather, paper, metal, glass, and ceramic, in most of their former uses. In developed countries, about a third of plastic is used in packaging and another third in buildings such as piping used in plumbing or vinyl siding. Other uses include automobiles (up to 20% plastic), furniture, and toys. In the developing world, the ratios may be different - for example, reportedly 42% of India's consumption is used in packaging. Plastics have many uses in the medical field as well, to include polymer implants, however the field of plastic surgery is not named for use of plastic material, but rather the more generic meaning of the word plasticity in regards to the reshaping of flesh.
The world's first fully synthetic plastic was bakelite, invented in New York in 1907 by Leo Baekeland who coined the term 'plastics'. Many chemists contributed to the materials science of plastics, including Nobel laureate Hermann Staudinger who has been called "the father of polymer chemistry" and Herman Mark, known as "the father of polymer physics".The success and dominance of plastics starting in the early 20th century led to environmental concerns regarding its slow decomposition rate after being discarded as trash due to its composition of very large molecules. Toward the end of the century, one approach to this problem was met with wide efforts toward recycling.
Since plastics are lightweight and sturdy, they can be conveniently used to transport goods. Vehicles made of lightweight plastics are more fuel-efficient. Lightweight plastics also economize on fuel consumption during the manufacturing process, and are therefore inexpensive compared to metal or paper. Also, plastics lend themselves to shaping and can be designed to make products resistant to impacts.
Additionally, since plastics are corrosion- and chemical-resistant, they can be used in any climate and for storing chemicals such as ammonia and caustic materials. Food-grade plastics preserve the freshness and flavor of foods. Plastics can also prevent contamination, which makes them useful in medical settings.
However, plastics require up to 500 or 1000 years for degradation. As plastics pile up in landfills, toxic chemicals contained in them are released into the environment, thus polluting the planet. Also, when wildlife consume plastics, mistaking it for food, it harms their health. Plastic food containers are said to leach harmful chemicals such as bisphenol A and phthalates into food materials contained in them, which can cause health problems in humans.