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Polyvinylidenechloride ( PVDC ) - Properties and Applications - Supplier Data by Goodfellow

Background

Polyvinylidenechloride ( PVDC ) is a transparent and almost colourless thermoplastic noted for its extremely low permeability to gases. As the homopolymer begins to decompose at or marginally above its melting point (200°C), all commercially available grades are copolymers (with vinyl chloride, acrylates or nitriles) and stabilisers are also normally necessary.

Applications

The applications of Polyvinylidenechloride ( PVDC ),are predominantly packaging and barrier films, often as the barrier layer in multi-layer structures.

Key Properties

The key properties of Polyvinylidenechloride ( PVDC ) are tabulated below.

Table 1. Key properties

Chemical Resistance
Acids - concentrated Good
Acids - dilute Good
Alcohols Good
Alkalis Good
Aromatic hydrocarbons Fair
Greases and Oils Good
Halogens Good
Ketones Fair
Electrical Properties
Dielectric constant @ 1 MHz 3.0 - 6.0
Surface resistivity ( Ohm/sq ) 1012 - 1013
Volume resistivity ( Ohm.cm ) 1012 - 1016
Mechanical Properties
Coefficient of friction 0.24
Hardness - Rockwell R98 - 106
Izod impact strength ( J m-1 ) 16 - 53
Tensile modulus ( GPa ) 0.3 - 0.55
Tensile strength ( MPa ) 25 - 110
Physical Properties
Density ( g.cm-3 ) 1.63
Flammability Self Extinguishing
Limiting oxygen index ( % ) 60
Resistance to Ultra-violet Fair
Water absorption - over 24 hours ( % ) 0.1
Thermal Properties
Coefficient of thermal expansion ( x10-6 K-1 ) 190
Thermal conductivity ( W.m-1.K-1 ) 0.13 @ 23
Upper working temperature (°C ) 80 - 100
Properties Polyvinylidenechloride Film
Property   Value
Dielectric Strength @ 25 µm thick KV.mm-1 160 - 280
Dissipation Factor @ 1 MHz   0.05 - 0.08
Elongation at Break % 30 - 80
Heat-sealing Temperature °C 120 - 150
Permeability to Carbon Dioxide @ 25 °C x10-13 cm3.cm.cm-2.s-1.Pa-1 0.02
Permeability to Nitrogen @ 25 °C x10-13 cm3.cm.cm-2.s-1.Pa-1 0.0007
Permeability to Oxygen @ 25 °C x10-13 cm3.cm.cm-2.s-1.Pa-1 0.004
Permeability to Water @ 25 °C x10-13 cm3.cm.cm-2.s-1.Pa-1 7

 

About Goodfellow

Goodfellow supplies metals, ceramics and other materials to meet the research, development and specialist production requirements of science and industry worldwide.

 

 

Source: Goodfellow.

 

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Comments

  1. Bill Pierce Bill Pierce United States says:

    Do you have any data for the UV barrier properties of PVDC?

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