HobbyParts Acrylic - Materials - Technical Information

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HobbyParts Acrylic - Materials - Technical Information

Acrylic - Polymethylmethacrylate (PMMA)

MBA Products made from this material
Balls

PMMA is an amorphous, transparent thermoplastic that is hard and stiff but brittle and notch-sensitive. It is UV resistant but has poor low temperature and solvent resistance. It is flammable but it has low smoke emission.

Properties of Polymethylmethacrylate

Physical Properties
PROPERTY	UNIT	VALUE
Density	g/cm³	1.19
Surface Hardness	Rockwell M	92-100
Tensile Strength	MPa	80
Tensile Modulus	GPa	2.4-3.3
Izod Impact Strength	J m^-1	16-32
Elongation at Break	%	2.5-4
Max Operating Temp.	^oC	85
Water Absorption	%	0.2 Over 24 Hours
Flammability	UL94	HB
Volume Resistivity	ohm.cm	2-14x10¹⁵
Dielectric Strength	kV/mm^-1	15
Dissipation Factor	@ 1MHz	0.014
Dielectric Constant	@ 1MHz	2.6
Heat Deflection Temp. @ 0.45 MPa	^oC	105
Heat Deflection Temp. @ 1.80 MPa	^oC	95

Chemical Resistance
Chemical	Resistance
Acids (Concentrated)	Poor-Good
Acids (Dilute)	Poor-Good
Alcohols	Poor-Good
Alkalis	Good
Aromatic hydrocarbons	Poor
Greases and Oils	Good
Halogenated Hydrocarbon	Poor
Halogens	Poor
Ketones	Poor

Note! Property values are typical and should be used only as a guide to selection of materials and not as purchase specifications.

You can purchase online at H.E. Supplies.

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Product Technical Information

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Tables and information on this web site should be read as a general guide only. The relevant standards should be consulted to ensure accuracy

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Site Summary:

H.E. Supplies (Hobby Engineering Supplies) offers thousands of products including remote controlled cars, planes, boats, and helicopters. We stock spare parts for remote controlled models. Our range includes the popular Solarbotics solar model kits and spares. We also distribute the full range of miniature engineering products from Miniature Bearings Australia. This range includes small bearings, timing pulleys, timing belts, seals, o-rings, gears and more. Also available from our store in Mansfield Queensland are a full range of lubricants, adhesives, kites, balsa wood and plastic rod and sheet materials. See our Online Catalogue for more information. Our main business is handled from our sales counter and showroom at 186 Wecker Road Mansfield, Queensland, Australia, but we also sell by phone, fax, online and mail order. We offer all of our hobby parts through our online store and some of the more popular MBA items. If you would like to purchase other MBA items online, Small Parts and Bearings offer the full range in their online catalogue.

Using the links at the top of this page you will find extensive information including catalogues (Products and Store link), technical data, and other product specific information.

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