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

          Material Information

          Buy Polyphenyleneoxide on-line

          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

          Buy Polyphenyleneoxide on-line

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

          Choose a form to search our on-line catalogue  

          Index