Comparison of Material Properties

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. 1kg50°C/hr °C 113 143
Heat Distortion Temp. Unannealed °C 98 124
Coefficient of Linear Expansion -   6 x 10-5 6.0~8.0 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.