outline:1/19/07 n n pick up quiz #1 – from me n n chem seminar: today @ 4pm n n chapter 13...
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Outline: 1/19/07
Pick up Quiz #1 – from me Chem Seminar: today @ 4pm Chapter 13 (cont’d)
Macromolecules
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Quiz #1
Average: 6.2 / 10Average: 6.2 / 10 What to do if…What to do if…
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Organic Chemistry: Nomenclature: Alkanes, Alkenes, Alkynes Branched chain alkanes Aromatic compounds Functional groups Organic Reactions Polymers Definitions
Properties Intro to Biochemistry….
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Organic Chemistry: Nomenclature: Alkanes, Alkenes, Alkynes Branched chain alkanes Aromatic compounds Functional groups
Let’s test the keypad units….
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What color is the sky…
11 22 33 44 55
1.1. RedRed
2.2. BlueBlue
3.3. GreenGreen
4.4. Sky, what sky?Sky, what sky?
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What type of functional group is this?
11 22 33 44 55
1. Amine
2. Aldehyde
3. Thiol
4. Acid
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What’s the correct name for:
11 22 33 44 55
1. 1,1 – dimethyl propane-1-thiol
2. 2 – methyl butane-1-thiol
3. 3- methyl pentane-1-thiol
4. 3- methyl butane-1-thiol
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Polymerizable Functional Groups
p. 111
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Polymer Linkage Groups
p. 111
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Organic Reactions
Substitution reactions e.g. ethanol + HBr
Addition reactions Condensation reactions
e.g. ethene + HBr
e.g. esters….
General class of reaction Example
Some specific reactions
acid + alcohol ester + water
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Acid + Alcohol =
salicylic acid methanol
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ester + water
methyl salicylate (oil of wintergreen)
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What type of reactions are shown on page 112 of the image book?
C
ondensation
reactions
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Polymers Poly = “many” + mer = “part”
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e.g. Alkene polymerization:
Chloroethene monomers(vinyl chloride)
PolyVinyl Chloride
What type of reaction?
addition
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Chemical Polymerization Reactions
There are four types of chemical There are four types of chemical polymerization reactions:polymerization reactions:
1.1. Free Radical Polymerizations.Free Radical Polymerizations.2.2. Condensation Polymerizations.Condensation Polymerizations.3.3. Cationic Polymerizations.Cationic Polymerizations.4.4. Anionic Polymerizations.Anionic Polymerizations.Only type 1 and 2 polymerizations in Only type 1 and 2 polymerizations in
Chapter 13…Chapter 13…
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Chemical Polymerization Reactions
There are four types of chemical There are four types of chemical polymerization reactions:polymerization reactions:
1.1. Free Radical Polymerizations.Free Radical Polymerizations.
p. 113
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Chemical Polymerization Reactions
ethylene
polyethylene
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What are examples of polymers? polyethylene, polypropylene (plastic), polyvinylchloride (PVC), polystyrene (packing beads), polyvinylacetate (latex), polymethylmethacrylate, (Plexiglass), polytetrafluroethylene (teflon), poly-cis-isoprene (synthetic rubber), composites (reinforced plastics), polyamides (kevlar)
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U.S. only
15.7
8.0
6.6
2.9
2003 figures
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Categories of polymers:
Plastics vs. Elastomers Thermoplasts vs. Thermosets
Cross-linking / vulcanization Addition polymers vs. Condensation
polymers
Don’t need to know all the names….need to be able to recognize polymersand their monomer units
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What could be the monomer(s)?
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Two different monomers:
OO
Cl
O O
Cl
N
NH H
H H
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= =
C(CH2)4C N (CH2)6 N==O O HH
n
+ H2O
Two molecules form bonds between their Two molecules form bonds between their functional groups by displacing waterfunctional groups by displacing water
O OO O
HOC(CHHOC(CH22))44COH + HCOH + H22N(CHN(CH22))66NHNH22
Polymer Demo: Nylon-66
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Up Next: Biopolymers
– – carbohydratescarbohydrates
– – DNA/RNADNA/RNA
– – proteinsproteins
Enthalpy (Chapter 6) revisitedEnthalpy (Chapter 6) revisited