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.