question and answers 2025 pdf.
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