Metallurgy and Materials Engineering Department, University of Punjab Lahore.

1. TOPIC:
PTFE
PRESENTED BY:
FARASAT ALI JUTT
14MME-S1-317
5TH SEMESTER
DEPARTMENT:
CEET(METALLURGY & MATERIAL ENGINEERING)

2. Introduction:
 Polytetrafluoroethylene is better known by the trade name of Teflon
 PTFE is highly molecular weight linear polymer consisting only Carbon &
Fluorine.
 It is produced by free radical addition polymerization reaction, which is
conducted as an emulsion in water.
 Its Fluorine atoms prefer their own kind e.g attracts only Fluorine & repel
other molecules, such as water.
Chemical Reaction:
Monomer: Name : 1,1,2,2-tetraflouroethylene (IUPAC Name) .
Chemical Formula is ;

3. Physical Properties:
Parameters Values
Melting Point 327 .
0
𝐶
Glass-Transition Temperature 115 .
0 𝐶
Crystallinity (60-80) %
Degradation Temperature 260 .
0
𝐶
Chemical Resistance even in aqua regia Good
Corrosion Resistance Excellent
Moisture Absorption No (Water proof)
Molecular Weight 400000-9000000 g/mole

4. Techniques:
 Polymerization technique of PTFE:
1) By suspension polymerization:
(Give granular powdered grade)
2) By emulsion polymerization:
(Give dispersion grade)
 Processing techniques of PTFE:
a) By compression molding (For simple shapes)
b) By isostatic molding (For complex shapes)
c) Ram extrusion (For continuous rods)

5. APPLICATIONS
Cookware Chemical and steel industries semiconductor industry Hair styling
( Slippery surfaces, non-stick ) (corrosion resistance & inertness to chemicals) ( Inert Polymer) ( iron comb coated with PTFE)
Fabric Protector Thread Seal Tape optical instruments Coating material
(Repel stains ,water) (Thread lubricant) ( porosity) (Friction resistance ,lubricant)

6. Research Article
On the aggregation process of ceramic LiSn2P3O12 particles
embedded in Teflon matrix.
1-Ceramic particles that contain
lithium ion conductor.
2-Teflon matrix insulator.
3-Below (30% volume ) ceramic
particles lay isolated.
4-More concentration of ceramic
particles more will be clustering.
5-Rhombohedral has higher
electrical conductivity than
triclinic phase.
6-Analysis by Scanning Electron
Microscopy.

7. Conclusion:
Accidental discovery of Teflon by Roy J. Plunkett led to many practical uses in the world
today. The practical ways in which it can be used has led to Teflon being apart of many
extraordinary things such as its extensive use in military appliances.
Reference:
1. Flouropolymers Industrial, Dupont , Wilmington , Deleware.
2. Teflon Mechanical Design Data, Dupont , Wilmington , Deleware.
3. Sciencedirect.com
4. William F. Smith.
5. Seprati C.A and J.L.McPherson, “Physical roperties of Polytetrafluoroethylene.”

8. JAZAKALLAH