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Polyphenyleneoxide ( PPO (modified), PPE (modified) )

Material Information

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We stock and supply the following standard forms:
Rod Sheet
Rod Sheet

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Common Brand Names:
Noryl, Vestoran, Luranyl
 
General Description:  

General Description : Although unmodified PPO is a semi-crystalline thermoplastic, all commercially available grades are blended with (high impact) polystyrene in order to improve melt processability. A wide range of proportions, together with the use of other modifiers, results in a good range of grades with differing properties tailored to the needs of individual end-uses.

These blends are amorphous, opaque, pale grey engineering thermoplastics with a balance of properties (and cost) not unlike nylon but without nylon's high water absorption and consequent dimensional instability. However they have poor fatigue characteristics and poor solvent, though good hydrolysis, resistance.

Applications include electrical and TV components, washing and dish-washing machine parts, automobile parts (especially fascias) and structural foam.

   

Chemical Resistance

Acids - concentrated Good-Fair
Acids - dilute Good
Alcohols Good
Alkalis Good
Aromatic hydrocarbons Poor
Greases and Oils Good-Poor
Halogenated Hydrocarbons Fair-Poor
Halogens Poor
Ketones Poor

Electrical Properties

Dielectric constant @1MHz 2.7
Dielectric strength ( kV mm-1 ) 16-20
Dissipation factor @ 1kHz 0.004
Surface resistivity ( Ohm/sq ) 2x1016
Volume resistivity ( Ohmcm ) 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
Radiation resistance Good
Water absorption - over 24 hours ( % ) 0.1-0.5

Thermal 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 @23C ( W m-1 K-1 ) 0.22
Upper working temperature ( C ) 80-120
All information and technical data are given as a guide only. Although every effort has been made to ensure that the information is correct, no warranty is given as to its completeness or accuracy.

Buy Polyphenyleneoxide on-line

We stock and supply the following standard forms:
Rod Sheet
Rod Sheet

Choose a form to search our on-line catalog  

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