Polyphenylene Oxide (PPO)

Polyphenylene Oxide (PPO)

Polyphenyleneoxide (PPO) is one of those high-performance polymers we like to call engineering thermoplastics. Its biggest strength is its resistance to high temperatures. It has a very high glass transition temperature, 210 oC. But there’s a price for being heat-resistant. Most polymers are processed at high temperature in a liquid-like state. But if your polymer won’t become liquid-like at reasonable temperatures, you can’t process it! For this reason, PPO is often made into blends with high-impact polystyrene (HIPS for short). Blending PPO with HIPS makes the PPO easier to process, plus it gives PPO some resilience. PPO needs this toughening because by itself PPO can be brittle in some situations.

General Properties:

Chemical Resistance

Acids – concentrated Fair
Acids – dilute Good
Alcohols Fair
Alkalis Good
Aromatic hydrocarbons Poor
Greases and Oils Fair
Halogens Poor
Ketones Fair

Electrical Properties

Dielectric constant @1MHz 2.7
Dielectric strength ( kV.mm-1) 16 to 20
Dissipation factor @ 1kHz 0.004
Surface resistivity ( Ohm/sq ) 2×1016
Volume resistivity ( Ohm.cm ) 1017

Mechanical Properties

Abrasive resistance – ASTM D1044 ( mg/1000 cycles ) 20
Coefficient of friction 0.35
Elongation at break ( % ) 50
Hardness – Rockwell M78/R115
Izod impact strength ( J.m-1 ) 200
Poisson’s ratio 0.38
Tensile modulus ( GPa ) 2.5
Tensile strength ( MPa ) 55-65

Physical Properties

Density ( g.cm-3 ) 1.06
Flammability HB
Limiting oxygen index ( % ) 20
Resistance to Ultra-violet Good
Water absorption – over 24 hours ( % ) 0.1-0.5

Physical Properties

Coefficient of thermal expansion ( x10-6 K-1 ) 60
Heat-deflection temperature – 0.45MPa ( °C ) 137
Heat-deflection temperature – 1.8MPa ( °C ) 125
Lower working temperature ( °C ) -40
Thermal conductivity ( W.m-1.K-1 ) 0.22 @ 23
Upper working temperature ( °C ) 80-120

Member Testimonials

ONGC – Oil and Natural Gas Corporation Limited

"ONGC - Oil and Natural Gas Corporation Limited" - Our complex drilling application where Shaft was eccentric and application was robust & muddy. Replacement was never easy. Mech Spares designed Oil seals resolved difficulty. This gave a complete joy to my maintenance team.
2014-06-08T07:48:57+00:00
“ONGC – Oil and Natural Gas Corporation Limited” – Our complex drilling application where Shaft was eccentric and application was robust & muddy. Replacement was never easy. Mech Spares designed Oil seals resolved difficulty. This gave a complete joy to my maintenance team.

Kuwait National Petroleum Company

"Mr Mohammed Al Duaigy" of (Kuwait National Petroleum Company) : We tried several diaphragms from renown worldwide Rubber manufacturing companies. We found Mech Spares technical know how and product to be of great durability and lasted 3 times more then anticipated. They have accurate understanding of there products.
2014-06-08T07:49:23+00:00
“Mr Mohammed Al Duaigy” of (Kuwait National Petroleum Company) : We tried several diaphragms from renown worldwide Rubber manufacturing companies. We found Mech Spares technical know how and product to be of great durability and lasted 3 times more then anticipated. They have accurate understanding of there products.

McCafferty BM Design Ltd, KENT United Kingdom

"McCafferty BM Design Ltd, KENT United Kingdom" - Most of the O rings manufacturing company suggested to use larger diameter and expensive elastomers. We learnt with Mech Spares that elastomer being weaker compare to metal and alloys and needs appropriate back up for high pressure or high vacuum applications. Further not necessary the most expensive elastomer is the best for all applications. We trust Mr Nilesh chodhari completely for all our O rings designing applications.
2014-06-08T07:50:26+00:00
“McCafferty BM Design Ltd, KENT United Kingdom” – Most of the O rings manufacturing company suggested to use larger diameter and expensive elastomers. We learnt with Mech Spares that elastomer being weaker compare to metal and alloys and needs appropriate back up for high pressure or high vacuum applications. Further not necessary the most expensive View Full →

Bhabha Atomic Research Centre ( BARC )

"Dr. A. Singh" of BARC: The electric Insulation mat manufactured by MECH SPARES as per IS 15624 tested at ERTL and found to withstand 40 Kv and still didn't tear. We have been using since 5 years and still didn't generate any fatigue. They arranged bulk delivery in short period.
2014-06-08T07:16:20+00:00
“Dr. A. Singh” of BARC: The electric Insulation mat manufactured by MECH SPARES as per IS 15624 tested at ERTL and found to withstand 40 Kv and still didn’t tear. We have been using since 5 years and still didn’t generate any fatigue. They arranged bulk delivery in short period.

Tata Steel

"Tata Steel" - One of our old machines started making loud noise and disturbed the entire village. We were compelled to stop the machines which lead to huge production loss. With the help of Mech Spares designed bellows in two part we could retain the lubrication and eliminate the noise.
2014-06-08T07:17:16+00:00
“Tata Steel” – One of our old machines started making loud noise and disturbed the entire village. We were compelled to stop the machines which lead to huge production loss. With the help of Mech Spares designed bellows in two part we could retain the lubrication and eliminate the noise.
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