23CHM115_spring_09

23CHM115_spring_09 - 1 CHM 11500 Lecture 23 Drugs as...

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Unformatted text preview: 1 CHM 11500 Lecture 23 Drugs as Molecules External readings; p. 732; pp 698- 699 See the course website 2 Condensation Polymerization Two monomers react and form a chain and a second small molecule 3 Polyesters This is the first step in formation of a polyester. 4 Polyesters Dacron, Mylar 5 Polyamides 6 Polyamides Nylon Kevlar 7 Kevlar H bond Dipole- Induced dipole IMF Fibers of Kevlar consist of long molecular chains produced from poly-paraphenylene terephthalamide. Kevlar derives a portion of its strength from intermolecular hydrogen bonds and dipole- induced dipole interactions between the carbonyl groups and hydrogen atoms on neighboring polymer chains and the aromatic stacking interactions between stacked strands. 8 Question Which polyethylene bottle is prepared from branched polyethylene? 9 Cellulose & Cellulose Nitrate (C 6 H 7 O 11 N 3 ) 2 3 CO 2 + 9 CO + 7 H 2 O + 3 N 2 Cotton Gun cotton HNO 3 , H 2 SO 4 10 Recycling 11 Recycling 12 Universal recycling symbols 13 The big six Six polymers constitute 76% of all plastics used in the USA - 40,000,000 tons (80,000,000,000 pounds) 14 The big six 15 Only a small fraction of plastics now are recycled, primarily because of difficulties in identifying and separating the various types of plastics. A large fraction of the waste stream from the automotive industry is composed of black plastics, and more than 2 billion pounds of it ends up in landfills or incinerators each year. 16 Drugs as Molecules Disease Mechanism (Cancer, Parkinsons, Alzheimers)...
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23CHM115_spring_09 - 1 CHM 11500 Lecture 23 Drugs as...

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