Polymethylmethacrylate - Acrylic - PMMA Casting

Polymer Type

Thermoplastic

Advantages

Similar physical properties to general-purpose acrylic. Can be made up in small batches, as required, and hand poured into moulds.

Disadvantages

Same problems as associated with general purpose acrylic, i.e. brittle and notch sensitive, limited/poor resistance to organic solvents.

Typical Properties

Property

Value

Density (g/cm3)

1.19

Surface Hardness

RM100

Tensile Strength (MPa)

70

Flexural Modulus (GPa)

3

Notched Izod (kJ/m)

0.02

Linear Expansion  (/°C x 10-5)

6

Elongation at Break (%)

4

Strain at Yield (%)

N/A

Max. Operating Temp. (°C)

50

Water Absorption (%)

0.3

Oxygen Index (%)

18

Flammability UL94

HB

Volume Resistivity (log ohm.cm)

17

Dielectric Strength (MV/m)

20

Dissipation Factor 1kHz

0.04

Dielectric Constant  1kHz

3.3

HDT @ 0.45 MPa (°C)

103

HDT @ 1.80 MPa (°C)

90

Material. Drying  hrs @ (°C)

NA

Melting Temp. Range (°C)

NA

Mould Shrinkage (%)

NA

Mould Temp. Range (°C)

NA

Applications

Decorative plaques for car badges, domestic appliance motifs, etc. Protective coatings for metals, concrete and wood.

 

Source : Abstracted from Plascams

For more information on Plascams please visit RAPRA Technology Ltd.

 

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