Polyvinylidenedifluoride - PVDF

Polymer Type

Thermoplastic

Advantages

Highest tensile strength of all processable fluorocarbons.  Good radiation resistance (better than other fluorocarbons).  Melt processable.  Good abrasion resistance. Good general chemical resistance, although inferior to PTFE.  Maximum use temperature 150°C (300°F).  Useful piezo-electric properties.

Disadvantages

High dissipation factor.  Processing machinery needs to be very clean.  Normally cannot reinforce with glass fibres due to decomposition initiated by boron.  Poor resistance to fuming acids.

Typical Properties

Property

Value

Density (g/cm3)

1.76

Surface Hardness

SD80

Tensile Strength (MPa)

35

Flexural Modulus (GPa)

1.7

Notched Izod (kJ/m)

0.18

Linear Expansion  (/°C x 10-5)

16

Elongation at Break (%)

50

Strain at Yield (%)

9.5

Max. Operating Temp. (°C)

150

Water Absorption (%)

0.04

Oxygen Index (%)

43

Flammability UL94

V0

Volume Resistivity (log ohm.cm)

14

Dielectric Strength (MV/m)

13

Dissipation Factor 1kHz

0.06

Dielectric Constant  1kHz

7

HDT @ 0.45 MPa (°C)

121

HDT @ 1.80 MPa (°C)

82

Material. Drying  hrs @ (°C)

4 @ 90

Melting Temp. Range (°C)

260 - 300

Mould Shrinkage (%)

3

Mould Temp. Range (°C)

80 -  90

Applications

Chemical process industry - pipes, bearings, pipe fittings, wire insulation, chemical laboratory apparatus, heat-shrinkable tubing

 

Source : Abstracted from Plascams

For more information on Plascams please visit RAPRA Technology Ltd.

 

Date Added: Sep 10, 2001 | Updated: Jun 11, 2013
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