Acrylic – PPMA

Acrylic has many different names including Poly(methyl methacrylate) (PMMA). It is also known as acrylic or acrylic glass as well as by many different trade names such as Plexiglas, Acrylite, Lucite, and Perspex to name just a few. Acrylic engineering plastic is transparent, lightweight and shatterproof.

 

This type of engineered plastic is often used as an alternative or replacement to glass, as well as casting resin, a comment in inks and coatings, to name just a few.

 

Acrylic can refer to a group of man-made plastic materials containing one or more derivatives of acrylic acid. The most often used and manufactured is polymethyl methacrylate (PMMA), it is a tough, highly transparent material with excellent resistance to ultraviolet radiation and weathering.

 

It can be coloured, moulded, cut, drilled, and formed to meet the needs of the end user. All of these properties make it perfect for many applications including airplane windshields, skylights, automobile tail lights, and outdoor signs.

 

Cast Acrylic sheet – Stock Shapes

Mechanical properties	parameter	value	unit	norm
Modulus of elasticity (tensile test)		2.800 – 3.200	N/mm2	ISO 527
Tensile strength		67 – 75	N/mm2	ISO 527
Elongation at break		4 – 6	%	ISO 527
Flexural strength		120	N/mm2	ISO 178
Compression strength		125	N/mm2	ISO 604
Impact strength		12 -26	kJ/m2	ISO 179-1
Indentation hardness		175	N/mm2	ISO 2039-1

 

Thermal properties	parameter	value	unit	norm
Heat Stability – Vicat B		100-116	°C	ISO 306
Forming Temperature		160-180	°C
Linear shrinkage after heating		<2	%
Thermal expansion (CLTE)		0.08	M/mm °C	ISO 11359-2
Specific heat		1.46	KJ/kg °C
Thermal conductivity		0.19	W/m °C	DIN 52612

 

Electrical properties	parameter	value	unit	norm
Dielectric constant	103 Hx	3.4		DIN 53 483
Specific volume resistance		10r15	*cm	DIN IEC 167
Dissipation Factor	50 Hx	0.06		DIN 53 483
Dielectric strength		40		DIN EN 60243-2

 

Other properties	parameter	value	unit	norm
Water absorption	24h,(20°C)	0.17	%	ISO 62
Light transmission	Clear sheet	92	%	DIN 5036

Cast Acrylic tube

 

Mechanical properties	parameter	value	unit	norm
Modulus of elasticity	23˚C	3300	MPa	D790
Tensile strength	-40°C	110	MPa	D638
	20°C	80
Elongation at break		5.5	%	DIN 53455
Flexural Strength	80x10x4 mm3	115	MPa	D790
Compressive Yield Stress		110	MPa
Impact strength (Charpy)		15	kJ/m2	DIN 53453
Notched impact strength (IZOD)		1.6	kJ/m2	DIN 53453
Indentation hardness	961/30	175	MPa	DIN 53456

 

Thermal properties	parameter	value	unit	norm
Forming Temperature		160 – 175	°C
Ignition temperature		425	°C	DIN 51794
Heat deflection temperature under load	1.8MPa 0.45MPa	105 113	°C
Service temperature	MAX	80	°C
Thermal expansion (CLTE)		0.7	mm/m˚C	DIN 53752
Specific heat		1.47	J/(g*K)
Thermal conductivity	20°C	0.19	W/(K*m)	DIN 52612

 

Electrical properties	parameter	value	unit	norm
Volume resistivity		>10 r15	. cm	DIN VDE 0303
Dielectric strength	1mm	˜30	kV/mm	DIN VDE 0303

 

Other properties	parameter	value	unit	norm
Water absorption	24h (20°C)	41	mg	DIN 53495
UV Transmission		no
Flammability	>2mm	B2		DIN 4102