Advantages And Disadvantages Of Biodegradable Plastics

970 WordsOct 1, 20174 Pages
Plastics today are products that we use everyday such as plastic bags, plastic food packaging and utensils. They are produced from nonrenewable sources such as fossil fuels, oil and natural gas. These plastics are known as non-degradable plastics and will take more than a year to break down in landfills, as these non-degradable plastic are being dumped into landfills every year. [ Recyclaholics: The Facts]. This indicates that these non-degradable plastics cannot be broken down by the environment, sunlight water or ground soil substances as these non-degradable plastics will have a longer lasting effect on the environment. This is where the use of biodegradable plastics comes into display as biodegradable plastics will help minimise…show more content…
However the PLA polymer products have been obtained which therefore tends to have a low molecular weight so therefore the second route has been improved by the ring opening polymerization of LA which is the normal process for making PLA then is condensed into water then converted into cyclic dimer of LA or lactide which is used as a monomer and therefore converted into polylactic acid. Non degradable plastics such as Polyethylene terephthalate which is therefore a commonly used thermoplastic polymer around the world and is known by its trade name “polyester”. It is used in grocery shoppings and packaging and is formed by adding altogether molecules of ethylene (C2H4). The main process producing polyethylene includes: raw material preparation, esterification, pre-polycondensation and polycondensation. Polyethylene is produced by polymerization from ethylene glycol and terephthalic acid. As according to this chemical equation Ethylene glycol which is a colourless liquid. When ethylene glycol and terephthalic acid is heated together under the influence of a catalyst which will than be fed into the esterification system. This indicates that esterification takes place under the pressure by separating water. Therefore the products from the esterification process is then sent off to the the pre-polymerization unit where the reaction is taken place under the influence of a vacuum, and the pre-polymerization

More about Advantages And Disadvantages Of Biodegradable Plastics

Open Document