EXAM FINALS QUESTIONS WITH
COMPLETE SOLUTIONS
/. Polymer - Answer-✅large molecule made by repetitive linking of smaller units
(monomers)
/.Macromolecule - Answer-✅very large molecule composed of thousands of covalently
bonded atoms (ex: polymer)
/.1. natural (in nature)
2. synthetic (in lab) - Answer-✅two ways polymers are made
/.rubber, carbs: starch & cellulose, proteins, nucleic acids DNA, RNA - Answer-✅natural
polymers
/.nylon, teflon, styrofoam, polyethylene, Dacron, - Answer-✅synthetic polymers
/.1. method of formation
2. final composition
3. stereochemical orientation - Answer-✅3 main ways to differentiate polymers
/.1. chain-growth
2. step-growth - Answer-✅Two classifications of Synthetic polymers
/.addition polymers - Answer-✅chain growth polymers are also know as:
/.made by addition of one monomer unit to another in a repetitive pattern - Answer-
✅How are chain growth polymers made?
/.chain growth polymerization - Answer-✅A polymerization involving sequential addition
to monomers that are unsaturated (C=C) or have some other reactive functional groups
(particularly ethylene and derivatives)
/.1. intervention
2. consumption of all available monomers - Answer-✅what 2 things stops chain growth
polymerization?
/.Teflon - Answer-✅chain-growth
, polymer: polytetrafluoroethylene
monomer: F2C=CF2
nonstick coating, goretex, electrical insulator, chem-resistant coating
/.Saran - Answer-✅chain-growth
polymer: polyvinylidenedichloride
monomer: H2C=CCl2
cling-wrap
/.Polypropylene - Answer-✅chain-growth
polymer: polypropylene
monomer: H2C=CHCH3
carpet fibers, car parts, toys, packaging, houseware
/.Orlon, Acrilan, Creslan - Answer-✅chain-growth
polymer: polyacrylonitrile
monomer: H2C=CH(CN)
textiles/fibers, carpets, upholstery
/.Polyvinyl Acetate - Answer-✅chain-growth
polymer: polyvinyl acetate
monomer: H2C=CH(OCOCH3)
elmers glue, silly putty, latex paints
/.Polyvinyl alcohol - Answer-✅chain-growth
polymer: polyvinyl alcohol
monomer: H2C=CH(OH)
eye med- artificial tears
/.Plexiglass (Lucite) - Answer-✅chain-growth
polymer: polymethylmethacrylate
monomer: H2C=C9CH3)COOCH3
clear plastic sheets , blocks, and tubing
/.the final polymer retains all of the atoms of the monomer - Answer-✅The defining
characteristic of chain-growth polymers
/.step growth polymerization - Answer-✅formed by the reaction between 2 different
functional groups on different monomer molecules with the accompanying loss of some
small molecule (typically water)
/.The final polymer chain does NOT include all the atoms initially present in the
monomer molecules - Answer-✅The defining characteristic of step-growth polymers
/.condensation polymers - Answer-✅step-growth polymers also known as: