Feature comparison

PMMA (Acrylic) & PC(Polycarbonate) Characteristics

Properties	Condition	Unit	PMMA	PC
Physical Properties
Specific Gravity	23°C	g/cm³	1.19	1.2
Light Transmittance	3.2mm	%	92	87
Refractive Index		-	1.49	1.586
Water Absorption		%	0.3	0.3
Thermal Properties
Melt Flow Index		g/10min.	1.6 (230°C/3.8kg)	10 (300°C/1.2kg)
VICAT Softening Temp.	1kg；50°C/hr	°C	113	143
Heat Distortion Temp.	Unannealed	°C	98	124
Coefficient of Linear Expansion	-		6 x 10-5	6.0~8.0 x 10-5
Molding Shrinkage	-	%	0.2~0.6	0.6~0.8
Mechanical Properties
Tensile Strength	-	Mpa	74	64
Flexural Strength		MPa	103	90
UL Flammability	UL 94	class	HB	HB~V0

The data given in above figure is based on information offered from raw material producer.
Values may differ under the processing conditions and coloring/pigmentation of the product.