CHEM 1106 Lecture Notes - Lecture 16: Glass Transition, Intermolecular Force, Silly Putty
3 Apr 2016
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Document Summary
The r group of an ester is replaced with an o, oxygen. Among many things, this can be used to make shock-resistant glasses. Polycarbonates are tough, clear polymers used in bulletproof glass, aircraft windows, protective helmets, safety glasses, and dental crowns. This is made from the reaction between bisphenol a (bpa,) and phosgene, which is very poisonous. Addition polymers contain all the atoms of the original monomers, while condensation polymers may not. They may be elastomers or tough and rigid, depending on the monomers used. They are used in foam rubber, skate wheels, and tough furniture inishes. Epoxy resins are often sold as two-part liquids. They make clear and durable coatings and are an excellent adhesive. They are mixed with a catalyst to induce polymerization and cross-linking. Composite materials are composed of high strength ibers (iberglass, graphite, or ceramic ibers) help in a polymeric matrix.
