Student%20Notes%20CHM115-F09-Lecture%2024%28revised%29

Student%20Notes%20CHM115-F09-Lecture%2024%28revised%29 -...

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1 CHM 115 Lecture 24 Today’s Lecture Reading was KTT: Section 10.5 on Polymers Polymers Introduction Structures Polymer Reactions Addition Condensation Commercial Polymers Next Lecture Review Section 10.5 on Polymers
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2 Polymer Characterized by repetition of a group of atoms that are bonded to each other. Properties will not vary if one or two of the repeating units are added or removed. Polyethylene
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3 Biopolymers What are the biopolymers we have discussed so far in the course? What are the repeating units in each case?
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4 Another Biopolymer Cellulose Monomer
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5 Another Biopolymer Proteins Repeat unit
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6 Another Biopolymer Genetic Material: DNA & RNA phosphate sugar base phosphate sugar base phosphate sugar base
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7 Polymer Structure Linear Branched Cross linked
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8 Polymer Structure Linear: The chains are all tangled up in each other. Makes many polymers strong in materials like plastics, paint, elastomers, and composites. High-density linear polyethylene medical devices Tangled linear polymer chain
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9 Polymer Structure Low-density branched polyethylene bag Branched: Branched carbon chains cannot line up as close to each other as unbranched chains can.
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Student%20Notes%20CHM115-F09-Lecture%2024%28revised%29 -...

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