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High performance polymers
1. High Performance Polymers
Submitted to : Dr.Rouchdy Zahran
Presented By : Ahmed Mamdouh
Spring 2019
Alexandria University
Faculty of Engineering
Chemical Engineering Department
Polymer Engineering
2. Outline
Why HPPs ?
HPPs Market
Examples for common HPPs
Applications
Additives
HPPs market to where?!
3.
4. Why HPPs ?
• High mechanical properties
• High strength to weight ratio
• High chemical resistance
• Thermal degradation resistance even
at elevated temperatures
But????
• High-priced
• high processing temperatures and
melt viscosities
5. Market
• North America is dominant in the high
performance plastics market by about
47%.
• Victrex (England)
• Daikin industries, Ltd. (Japan)
• Solvay S.A. (Belgium)
• Evonik Industries AG (Germany)
• E. I. Du Pont de Nemours and
Company (U.S.A)
• SABIC (Saudi Arabia)
6. Examples for common HPPs
Structural
PEEK
• Two ether groups and the keto group
• Condensation of 4,4-Difluorodiphenyl
ketone with Hydroquinone
• Thermoplastic
Extreme temperature
PAI & PI
• condensation of a tricarboxylic acid
and a primary diamine
• Considered a Thermoset polymer
7. PEEK vs PI
• PEEK (like most thermoplastics)
quickly loses its mechanical properties
above the onset of its glass transition
temperature (289˚F for PEEK)
• while PI maintains significant strength
and stiffness at temperatures well
above 500˚F
• Vespel®
9. Aerospace
• In addition to engine connections &
valve seats
• PI exhibit a wide range in service
temperature and are therefore
candidates for such applications
• In the aerospace market High
Performance Polymers are replacing
metals
• reduce weight and improve fuel
efficiency, while allowing for simplified
manufacture
• For example PEEK is a substitute for
aerospace materials, including
aluminum (40% lighter), titanium (55%
lighter), and stainless steel (70%
lighter)
12. Coating & insulation films
Coating
• Extreme environment conditions
• chemical, high temperature, abrasion,
and wear resistance
• Aerospace applications
• For example VICOTE
Coatings (PEEK-based Coatings)
Insulation films
• polyvinyl fluoride (PVF) film was used
for insulation films but recently HPPs
has partly replaced PVF in this field
• For example APTIV film (PEEK-based
films)
• These systems reduce weight by up
to 60% when compared to PVF film
14. Melt stablizers
• In the course of melt processing Some polymers show a strong tendency to crosslink like
unstabilized poly(aryletherketone)s
• This behavior is highly undesirable since the melt viscosity increases
• such as zinc oxide or zinc sulfide
15. Reinforcing Additives
• Adding glass fiber and carbon fiber
reinforcements to neat polymers
significantly increases strength,
making them suitable for structural
applications
16. Radiopaque fillers
• PEEK exhibits an X-ray absorption
close to human tissue and is invisible
in X-ray
• Radiopaque fillers ,such as barium
sulphate and tungstene, are opaque
• therefore are visible under x-ray, so a
radiofiller Is added to PEEK
• Unlike metals, the materials do not
generate X-ray artifacts
17. Anti-microbial additives
• Cause of the contact with blood,
implantable devices and parts need to
be highly biocombaitable
• Therefore silver Oxide (AgO) is added
to HPPs which release of silver ions
upon contact to water