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CHEM 11.2 3A midterm 2 trimestre 2 (petrochemicals and polymers) - Coggle…
CHEM 11.2 3A midterm 2 trimestre 2 (petrochemicals and polymers)
plastic
material that can be shaped into a form, often reversable
High molecular weight
termoindurenti: polimeri che induriscono per il riscaldamento
termoplastici: fusi con calore
elastomeri
elastomeri reticolati(gomme)
elastomeri termoplastici
polymers
large organic macromolecules
made up of monomers linked together by polymerisation
Each monomer is connected to the adjacent units
via covalent bonds
ADDITION
POLYMERISATION
ethene from cracking
steam(ethanol), polymerise(polyethene), chlorine(vynil chlorine: polymerise(PVC)), benzene(phenylethene:polymerise(polyestyrene)).
alkenes(double bond)
addition reaction
double bond is broken and other atoms attach to carbons
many molecules of ethene join each other form a large molecule
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propeties
Huge number of
intermolecular forces
High melting and
boiling point
Strong C-C covalent
bonds
Inert and not
degradable
CONDENSATION
POLYMERISATION
nylon, a synthetic polymer of condensation
is solyd but can be melted and turned into fibers which can be woven
copolymer of two different monomers, a diamine and a dicarboxylic acid.
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types
polyethylene(PE)
tough, durable
polypropylene(PP)
Polyvinylchloride(PVC)
Polytetrafluoroethylene(PTFE, TEFLON)
polystyrene
1 meth 2 eth 3 prop 4 but 5 pent 6 hex 7 hept 8 oct 9 non 10 dec
