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1. Topic: Polycarbonate
Name: M.Qasim
Roll No:
E13-342
Semester: 5th
Dept: Metallurgy & Material Enigineeriing
University Of the Punjab

2. polycarbonate: PC trademarked names Lexan, Makrolon,
Makroclear and others, are a particular group of thermoplastic polymers.
Easily worked, molded, thermoformed and recycleable material.
PC was first developed by German
scientist '' Hermann Schnell" in
1953.
• PC is one of the high
performance heterochain
polymeric materials that comprise
the family of
“engineeringthermoplastics”
• PC is a good material due to its
good impact strength low scretch
resistance.

3. chemical structure
bisphenol A (BPA)
• condensation polymerization is
occure in PC
• Bisphenol A is produced by the
condensation of phenol with
propanone.
• Carbonyl chloride is produced
from carbon monoxide and
chlorine

4. Properties: (phy,mech)
• density of pc is 1.20–1.22 g/cm3
• Excellent resistance (no attack) to
dilute acids and mineral oils.
• Poor resistance with
Concentrated Acids, Bases,
Esters, Aliphatic Hydrocarbons,
Aromatic Hydrocarbons,
Hydrocarbons, and Oxidizing
Agents.
• Melting temperature (Tm)
155 °C (311 °F)
• Glass transition temperature (Tg)
147 °C (297 °F)
• heat deflection tempetarure is
(Hdt) 128–138 °C
• PC is commercially available into
pellets form.

5. Processes:
Moulding Extrusion
The molten pc is pass through The pc melt is pressed into
the die that gives the material its a mould with the definite shape
final shape after that materail of tha final product. The melt is
cooled rapidely. long pipe and then cooled into the mold. The
sheet are created b this method. process is specific for parts of
automobile and computer parts.

6. Application:
• PC is used into electronic component like dielectric and capacitor it
is also good insulator
• Used for glazing
• Used into data storage devices like Compact Discs, DVDs, and
Blu-ray Discs.
• Automotive, aircraft and security component like F-22 Raptor jet
and bullet-proof "glass",
• Limitation:
• Subject to stress cracking.
• Degrades upon extended residence time in processing equipment.
• Chemical resistance is only fair.
• Aromatic sensitivity.

7. Article: 1 Changes in the properties of Lexan polycarbonate by
UV irradiation
• The changes in the microstructural
parameters of Lexan polycarbonate
films irradiated with UV radiationat a
wavelength of =250 nm wereƬ
investigated using wide-angle X-ray
scattering measurements. The
• crystal imperfection parameters,
such as the crystallite size, lattice
strain, and enthalpy, were
determined by line profile analysis
using the Fourier method of Warren.
• Thermogravimetric analysis
revealed that the thermal
decomposition temperature
increased after the films were
irradiated.
• total uv out is 0.5 w at centre of the
photoreactor where the film
• was placed to be irradiated.
Reference: Nuclear Instruments and Methods in
Physics Research B 295 (2013) 61–68
www.sciencedirect.com.

8. Article: 2 Compact Disc Laser Cleaning for Polycarbonate
Recovering
• Laser cleaning of Compact
Discs (CDs) through the
employment of a 30 W MOPFA
Q-switched pulsed Yb:YAG
fibre laser investigated.
• several advantages, including:
absence of mechanical
contact, reduction of
secondary pollutants, low
energy consumption, greater
flexibility of use and possibility
to work small batches.
• The minimum time required to
clean a CD-R with a beam
power higher than 250W is 5
seconds.

9. conclusion:
After the brifely explanation of pc am
reached to conclusion that is if we
comapre pc with other polymer it
promin with its high impact strength.