SCI 300 Lecture Notes - Lecture 10: Low-Density Polyethylene, Ultimate Tensile Strength, Recycling Symbol
27 Apr 2016
School
Department
Course
Professor
Document Summary
Origin greek (cid:272)o(cid:373)(cid:271)i(cid:374)i(cid:374)g for(cid:373) of (cid:373)o(cid:374)os + (cid:373)eros part, portio(cid:374) monomer a rea(cid:272)ta(cid:374)t that is used to make a polymer. Polymerization: a reaction that breaks bonds from a monomer to form new bonds in a polymer. There are two general types of polymerization reactions. Addition polymerization-a reaction that bonds all the atoms of the monomer in the polymer chain. Condensation polymerization-a reaction that joins some of the atoms of the monomer into the polymer with the loss of a small molecule. Polymerization of a large number of lactic acid. Polymers can be classified as synthetic, inorganic or organic (biological) based on their source or composition. Difficult to control size distribution of polymer chains in some polymerizations. Polymers have a number of different properties due to their large molecule weight compared to similar molecules. These plastics can be melted and shaped into different objects such as bags, bottles, and pipes.
