Many so-called biodegradable polymers, but in reality the polymer is

Environmentally friendly plastics Written by Administrator Thursday, 15 January 2009 By. Johan Nasiri environmentally friendly foam material plastic is desirable in the present, especially with the increasing environmental burden due to the garbage, but the development of environmentally friendly plastic is very slow in the head to commercial plastics. This is due to the price is still expensive and somewhat different properties from conventional plastics. However the slow degradation of conventional plastics have become a concern to many people, so the use of environmentally friendly plastiik remains the hope of protection measures against environmental
Environmentally friendly plastic is desirable in the present, especially with the increasing environmental burden due to the garbage, but the development of environmentally friendly plastic is very slow in the head to commercial plastics. This is due to the price is still expensive foam material and somewhat different properties from conventional plastics. However the slow degradation of conventional plastics have become a concern to many people, so the use of environmentally friendly plastiik remains the hope of protection measures against environmental
Biodegradable thriving since decades foam material ago also growing very slowly, but with the higher price of oil 145 usd per barrel at this point, then the price of bio-plastics will soon be competitive compared to other plastics. Another advantage of biodegradable plastic is produced from renewable sources can not have the nature of the oil and naturally degradable. European foam material Commission for prospective technological studies concluded the plastic needs to reach 1-2% of the total polymer market by 2010 and to 5% in 2020.
Many so-called biodegradable polymers, but in reality the polymer is 'bioerodable', 'hydro-biodegradable' or 'photo-biodegradable'. For the environmentally friendly plastic which can be summed up as: degraded as 'biodegradable', 'compostable', 'hydro-biodegradable', 'photo-biodegradable', and 'bioerodable'. In the market the type of plastic foam material can be as Fotodegradable Polymer, Starch-based Polymers, Polymers Dissolved in water, biodegradable polyester.
Photo degradation in plastics can be caused by lack of regular in the polymer or added materials that are sensitive to UV light or sunlight. Speed degradation typically increases with additional material is also called a promoter. Promoters commonly used is of a carbonyl group or carbon, C, binds duplex (double-bonded) with Oxygen, O, and metal complex is a metal that is mixed with various compounds. This degradation still leaves the question whether the degradation products would really be a non-plastic products or simply foam material degraded into small particles.
Copolymer material that is added to assist photodegradation process can be as monomers when the copolymerization process. Comonomer is added typically having a ketone group and carbon monoxide. Metallic materials foam material are normally added when the process as an additive. foam material
Ketone carbonyl copolymers obtained with the addition of comonomer in the polymerization of vinyl ketones polyethylene and polystyrene. The results foam material of the copolymer foam material will be degraded if the carbonyl foam material group mengabsorb foam material sunlight. The results of microbial degradation require assistance foam material to change into CO 2 and water. Because degradation requires direct sunlight then this product is suitable foam material for use for mulch films which usually foam material ends up being trash.
Copolymers with carbon monoxide commercialized by Dow chemical, Du Pont and Union Carbide. Copolymers obtained, usually of the type of PE, then with the help of sunlight will degradable plastic.
Additives are added in plastic metal complex to the initiation of the process of decomposition. The advantages of this additive is not overly dependent on sunlight. In fact if this plastic has received sufficient UV light, when buried in the soil, the plastic can be degraded. Issues of concern of this type of additive is the possibility of residual heavy metals that are toxic after degradation process. These additives are known as 'prodegradant' concentrate is usually a transition metal catalyst such as component-based Co-stearate, Mn-stearate. The material is added in the amount foam material of 1-3% and will add to cost between 10-35% of the price of polyethylene.
The addition of starch in plastic degradation process is expected to take place beginning with the biological process followed by photo degradation and biodegradation foam material last longer. Degradation of starch will leave an empty space in the plastic so that the contact surface extending between the plastic with metals present in the soil. Energji of sunlight in the ground with a metal catalyst