CHE 1405 Chapter Notes - Chapter 10: Carboxylic Acid, Amine, Intermolecular Force
Document Summary
10. 1 polymerization: making big ones out of little ones. Polymer made from much smaller molecules called monomers. Polymerization process by which monomers are converted to polymers. Living things could not exist without polymers. Each plant and animal requires many different specific types of polymers. The earliest synthetic attempt to improve on natural polymers involved chemical modification of a common macromolecule. Semisynthetic material celluloid was derived from natural cellulose. 10. 2 polyethylene: from the battle of britain to bread bags. Ellipses ( ) and tildes (~) serve as et caters. In the formula, the repeat unit is placed within brackets with bonds extending to each side. The subscript indicates that this unit is repeated many times. Properties: tough and flexible, excellent electric insulator, able to withstand both high and low temperatures. High-density polyethylene (hdpe) mostly linear molecules that pack closely together: can assume a fairly well-ordered crystalline structure, rigid and good tensile strength, high density compared to other polyethylenes.
