status of polymers
Post on 15-Apr-2017
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WELCOMEStatus of PolymersM.PRIYADHARSHINI IIBSC PHYSICSDEPARTMENT OF CHEMISTRY & PHYSICSN.S COLLEGE OF ARTS & SCIENCE THENI.
What is a polymer ?A long molecule
made up from lots of small molecules called
monomers.
POLYMERS SIMPLE POLYMERS:
Monomers all same type (A) A + A + A + A -A-A-A-A-
Eg: poly(ethene) polychloroethene PVC PIPES
DIFFERENT POLYMERS: Monomers of two different types A + B A + B + A + B -A-B-A-B-
Eg: polyamides polyesters
POLYMERS IN PHYSICS Polymers in physics shows that ,there is
the changes of materials properties like….
Stress ,strain Conductivity Hardness Toughness viscosity
Bonding
Covalent
Ionic (NaCl)
Polar (H2O)
Van der Waals
Polymers in Chemistry
Polymers are giant molecules usually with carbons building the backbone – exceptions exist (poly dimethylsiloxane)
Linear chains, branched chains, ladders, networks, dendrimers
Homopolymers, copolymers, random copolymers, micro phase separated polymers (like amphiphilic polymers)
Molecular Structure of Polymers
Linear High Density Polyethylene (HDPE), PVC, Nylon,
Cotton Branched
Low Density Polyethylene (LDPE)
Cross-linked Rubber
Network Kevlar, Epoxy
Low-Density Polyethylene (LDPE)
High-Density Polyethylene (HDPE)
Ultra-high-molecular-weight polyethylene (UHMWPE)
Helmet
Gears
Joint Replacemen
t
Polyethylene Terephthalate (PETE) “Polyester”
Ester
Polymers in Biology
DNA
Sugar
Starch
Proteins
Rubber Tree
Sap: Sticky Viscous Gooey
Goodyear Experiment Luck Profit ($0)
POLYMERS IN NANO SCIENCE
Current status
Current status
CURRENT STATUS
CONCLUSION Polymers (or plastics as they are also called) are known to have good insulating properties.
Polymers are one of the most used materials in the modern world.
Their uses and application range from containers to clothing.
They are used to coat metal wires to prevent electric shocks.
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