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Biodegradable plastics

 Plastic » is a word meaning malleable, or something (suitable for molding). Plastics are softened by heat and can be molded into any shape like children's play dough. Therefore, plastics can be heated and made into various shapes, of course, after cooling, they harden and remain in the shape they found. Plastic is a product that is used for various purposes. Plastic may be hard or soft, transparent or opaque. It can look like wood, leather, or silk.

Currently, there are more than 10,000 different types of plastics. Some types of plastics are recyclable and some are non-recyclable. According to some, plastics are waste that cannot be converted in the end or because they consume fossil fuels. They call them energy-consuming, when this is not the case, and plastics are very efficient in terms of energy and consumption. That is, much less energy is used to make a plastic bottle than to make a glass bottle. Also, since Plastics are light in weight and less energy is used to transport them. Although plastics are generally light, their disposal in landfills is not a good option, there are two other ways, recycling and incineration.

The use of these methods leads to the recovery of some plastic values ​​that can be used in the reconstruction of plastic items. Garbage incineration recovers chemical energy that can be used to generate steam and electricity. If land burial Plastics do not have any of these advantages, and in addition, sanitary burial of plastic means permanent burial because this type of waste does not decompose. The uses of plastic are thermal and electrical insulation, it is light weight, and it can be made in such a way that it never Do not break or use it to make toys or heart valves. In today's age, the advancement of technology depends on the advancements that have been made in the field of materials.

Composite materials are a sign of great steps taken in the development of engineering materials. With the physical combination of 2 or more materials, not only lighter and stronger materials are obtained, which replace traditional materials such as metals, ceramics, wood and ordinary polymers, but also specific properties can be obtained in this material according to the intended application. created materials. In the physical composition of the components, they completely preserve their nature, but in some composite materials, minor surface modifications are applied to the components in order to improve the properties of the materials.