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Chemistry II

Polymer Review

QuestionAnswer
Glyptal Glycerol and Phthalic anhydride Thermosetting, Condensation, Highly cross linked
Kevlar 1,4-Benzenediamine and Terephthaloyl chloride
Nylon 6-10 Sebaccoyl chloride and 1,6-Diamino hexane Thermoplastic, Condensation, Linear
Polyacrylonitrile Acrylonitrile
Polyethylene Ethylene
Polypropylene Propylene
Polystyrene Styrene
Polyvinyl chloride Vinyl chloride
Saran Vinylidene chloride and Vinyl chloride
Teflon Tetrafluoroethene
Thermoplastic Can be reheated, softened, and reformed
Thermosetting Plastics hardens permanently and cannot be reformed
Elastomer Stretches but always returns to original state
Addition Polymerization Adds end for end and uses all atoms Often alkenes
Condensation Polymerization Small molecule splits out Often involves functional groups
Cross-linking One chain connects to another chain
Copolymer Two different monomers that are connected
Homopolymer A polymer made from many copies of a single repeating unit
Vulcanization Added sulfur to rubber cross linking to add strength
Natural Rubber Isoprene
Natural polymer examples DNA, RNA, starches, silk fibers, keratin, hair
Polyester [-O=C-O-C-] Ester
Polyamide [-O=C-H-N-C-] Amide
LDPE Low Density Polyethylenes More branching
HDPE High Density Polyethylenes Less branching
 

 



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