Vivak Technical Data

	Typical values	Units	Test method
Physical
Density	1.27	g/cm³	DIN 53479
Moisture absorption:
- 23°C, 24h immersion (3 mm)	0.2	%
Index of refraction n D at 20°C	1.57		DIN 53491
Light transmittance (2 mm sheet)	88	%	DIN 5036

Mechanical
Tensile stress at yield	50	N/mm²	DIN 53455 (1)
Elongation at yield	5	%	DIN 53455 (1)
Tensile strength	26	N/mm²	DIN 53455 (1)
Elongation at break	>100	%	DIN 53455 (1)
Tensile modulus of elasticity	2050	N/mm²	DIN 53457 (2)
Limiting flexural stress	77-83	N/mm²	DIN 53452
Impact strength:
- Charpy unnotched	no break	J/m²	DIN 53453
- Charpy notched	16	J/m²	DIN 53453
- Izod notched (4 mm)	90	J/m	ASTM D256
Instrumented impact (4 mm) at F max	28	J	ASTM D3763
Rockwell hardness	R104-R117	rating	ASTM D785

Thermal
Glass transition temperature	81	°C
Thermal conductivity (l)	0.32	W/m°C	DIN 52612
Coeff. of linear thermal expansion	0.050	mm/m°C
Heat deflection temperature under load acc. to SO/R75			DIN 53461
- method A: 1.81 N/mm 2	63	°C
- method B: 0.45 N/mm 2	70	°C
Max. service temperature in air (3)	65	°C
Min. service temperature	-40	°C

Electrical
Dielectric strength (4)	20	Kv/mm	IEC 243-1
Volume resistivity	10¹⁵	Ohm.cm	DIN 53482
Surface resistivity	10¹⁶	Ohm	DIN 53482
Dielectric constant at 10³ Hz	2.6	-	DIN 53483
Dielectric constant at 10⁶ Hz	2.4	-	DIN 53483
Dissipation factor at 10³ Hz	0.005	-	DIN 53483
Dissipation factor at 10⁶ Hz	0.020	-	DIN 53483

Flame
Oxygen index	26	%	ASTM D2863
Flammability (3 mm sheet)	V-2 (6)	rating	UL 94
Glow wire test (2 & 3 mm)	850	°C	IEC695-2-1
Germany
- 0.5 to 8 mm sheet	B1	rating	DIN 4102/part1
- 4 mm sheet	S4/SR2/ST1	rating	DIN 5510 DIN
- 5 & 6 mm sheet	S4/SR2/ST2	rating	5510