PMMA (Polymethylmethacrylate/acrylic) Material Data Sheet (heat resistant)

PMMA (heat resistant) Designation

Polymethylmethacrylate (Heat Resistant, Molding and Extrusion)

PMMA (heat resistant) Tradenames

Acrigel, Acryl, Acrylite, Acrypet, Acryrex, Alathon, Altuglas, Anjacryl, Aristech, Astaglas, Claradex, Colorrx, Cyrolite, Delpet, Diakon, Elvacite, Elvakon, Goldrex, Lucite, Maxiglas, Next, Optix, Parapet, Permastat, Perspex, Plaskolite, Plexiglas, Plexiglas Satinice, Polyman, Polyplex, Shinkolite-P, Solarkote, Sumipex, Terez, Trimma, Tufcoat

PMMA (heat resistant) Typical uses

Light fittings, display signs, domestic baths, packaging, safety spectacles, tool handles, motorcycle windscreens, baby incubators

PMMA (heat resistant) Compositional summary

(CH2-C(CH3)COOCH3)n
Material family	Plastic (thermoplastic, amorphous)
Base material	PMMA (Polymethyl methacrylate / acrylic)
Polymer code	PMMA

PMMA (heat resistant) Composition detail (polymers and natural materials)

Polymer

100

PMMA (heat resistant) Physical properties

Density

1.160

–

1.22

g/cm³

PMMA (heat resistant) Mechanical properties

Young’s modulus	2.41	–	3.8	GPa
Specific stiffness	2.02	–	3.2	MN.m/kg
Yield strength (elastic limit)	65.7	–	72.4	MPa
Tensile strength	64.1	–	79.3	MPa
Specific strength	54.9	–	61.2	kN.m/kg
Elongation	2	–	10	% strain
Compressive modulus	1.65	–	2.54	GPa
Compressive strength	103	–	117	MPa
Flexural modulus	3.09	–	4.26	GPa
Flexural strength (modulus of rupture)	82.7	–	124	MPa
Shear modulus	0.866	–	1.37	GPa
Bulk modulus	4.55	–	4.78	GPa
Poisson’s ratio	0.384	–	0.4
Shape factor	4.9
Hardness – Vickers	20	–	22	HV
Hardness – Rockwell M	94	–	100
Hardness – Rockwell R	118	–	130
Elastic stored energy (springs)	617	–	1e3	kJ/m³
Fatigue strength at 10^7 cycles	25.2	–	32.7	MPa

PMMA (heat resistant) Impact & fracture properties

Fracture toughness	0.7	–	1.6	MPa.m^0.5
Toughness (G)	0.18	–	0.761	kJ/m²
Impact strength, notched 23 °C	1.9	–	2.1	kJ/m²
Impact strength, notched -30 °C	1.82	–	2.2	kJ/m²
Impact strength, unnotched 23 °C	19	–	21	kJ/m²
Impact strength, unnotched -30 °C	16.4	–	19.8	kJ/m²

PMMA (heat resistant) Thermal properties

Glass temperature	105	–	120	°C
Heat deflection temperature 0.45MPa	97	–	112	°C
Heat deflection temperature 1.8MPa	92	–	107	°C
Vicat softening point	101	–	116	°C
Maximum service temperature	90	–	105	°C
Minimum service temperature	-75	–	-65	°C
Thermal conductivity	0.19	–	0.21	W/m.°C
Specific heat capacity	1.4e3	–	1.48e3	J/kg.°C
Thermal expansion coefficient	72	–	128	µstrain/°C
Thermal shock resistance	167	–	338	°C
Thermal distortion resistance	0.00156	–	0.00278	MW/m

PMMA (heat resistant) Electrical properties

Electrical resistivity	3.3e23	–	3e24	µohm.cm
Electrical conductivity	5.75e-23	–	5.22e-22	%IACS
Dielectric constant (relative permittivity)	3.2	–	3.4
Dissipation factor (dielectric loss tangent)	0.05	–	0.06
Dielectric strength (dielectric breakdown)	15.7	–	19.7	MV/m
Comparative tracking index	600			V

PMMA (heat resistant) Magnetic properties

Magnetic type

Non-magnetic

PMMA (heat resistant) Optical, aesthetic and acoustic properties

Refractive index	1.49	–	1.5
Transparency	Transparent
Acoustic velocity	1.41e3	–	1.8e3	m/s
Mechanical loss coefficient (tan delta)	0.0105	–	0.0166

PMMA (heat resistant) Absorption & permeability

Water absorption @ 24 hrs	0.2	–	0.3	%
Water vapor transmission	1.62	–	1.79	g.mm/m².day
Permeability (O2)	4.31	–	7.19	cm³.mm/m².day.atm

PMMA (heat resistant) Processing properties

Polymer injection molding	Acceptable
Polymer extrusion	Excellent
Polymer thermoforming	Acceptable
Linear mold shrinkage	0.2	–	0.8	%
Melt temperature	182	–	329	°C
Molding pressure range	34.4	–	206	MPa

PMMA (heat resistant) Durability

Water (fresh)	Excellent
Water (salt)	Excellent
Weak acids	Acceptable
Strong acids	Unacceptable
Weak alkalis	Excellent
Strong alkalis	Excellent
Organic solvents	Unacceptable
Oxidation at 500C	Unacceptable
UV radiation (sunlight)	Good
Flammability	Highly flammable