The Use Of Creating Polylactic Acid Using Starch From Corn Acid

1210 WordsOct 30, 20145 Pages
Biopolymers are polymers (large molecules, consisting of many repeated subunits) produced by living organisms also known as organic polymers. An example of this is starch, which by chance is one of the most commonly used raw materials in creating Polylactic acid. DNA and RNA are both examples of Biopolymers that have been constructed from nucleotides. Polylactic Acid Polylactic acid is a biodegradable thermoplastic deprived from renewable sources such as cornstarch and sugarcane There are several routes in order to create Polylactic Acid (PLA) however, the most commonly used one and one I will be discussing today being the polymerization of lactic acid. Another method is the use of the cyclic lactic acid dimer called lactide as an intermediate stage. I am going to explain the method of creating Polylactic Acid using starch from corn. Polylactic acid has the chemical formula (C3H4O2) n Chemical process involved in the production of Polylactic acid Polylactic Acid is easily made and is usually done in two steps. The first step in creating PLA bacteria ferment the corn in order to create lactic acid. Step two is the lactic acid leads to the creation of PLA by chemical reactions. (I have attached the physical production method on a separate piece of paper) First step: For corn starch or other organic materials used in biopolymers to become lactic acid and therefore turn into PLA the Corn starch has to converted to dextrose. The corn is wet milled and separates into starch,
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