Comparison
General Purpose Styrene-Butadiene Rubber vs PLA
A side-by-side comparison of Styrene-Butadiene Rubber (General Purpose) and Polylactic Acid.
Physical
Density
0.92 - 0.95 g/cm³
1.24 g/cm³
Water Absorption (24h)
0.5 %
0.5 %
Transparency
Opaque
Semi-transparent
Shrinkage
1.5 - 2.0 %
0.3 – 0.5 %
Mechanical
Young's Modulus
0.02 - 0.06 GPa
3.5 GPa
Tensile Strength
15 - 25 MPa
50 – 65 MPa
Elongation at Break
400 - 600 %
6 %
Impact Strength (Izod)
N/A
16 J/m
Flexural Strength
—
80 MPa
Thermal
Glass Transition Temperature
-50 to -60 °C
60 °C
Melting Point
N/A
150 – 160 °C
Continuous Service Temperature
-40 to 70 °C
45 °C
Heat Deflection Temperature
N/A
55 °C
Electrical
Dielectric Constant
3.0 - 3.5
3.0
Volume Resistivity
10^12 - 10^13 Ohm-cm
10¹⁴ Ω·cm
Dielectric Strength
10 - 20 kV/mm
—
Chemical resistance
Acids
Fair
Fair
Bases
Good
Poor
Solvents
Poor (swells in hydrocarbon oils)
—
UV Resistance
Fair
Poor
Alcohols
—
Fair
Hydrolysis
—
Poor
Sustainability
Recyclability
Limited
Industrially compostable
Recycling Code
N/A
7
Carbon Footprint
Moderate
~1.6 kg CO₂e / kg
Bio-based Content
—
100 %