Comparison
PMP Transparent High Temp vs PLA
A side-by-side comparison of Poly(4-methyl-1-pentene) for High-Temperature Transparent Applications and Polylactic Acid.
Physical
Density
0.830-0.840 g/cm³
1.24 g/cm³
Water Absorption (24h)
<0.01 %
0.5 %
Transparency
Excellent
Semi-transparent
Shrinkage
1-3 %
0.3 – 0.5 %
Mechanical
Young's Modulus
1.0-1.5 GPa
3.5 GPa
Tensile Strength
25-35 MPa
50 – 65 MPa
Elongation at Break
10-30 %
6 %
Impact Strength (Izod)
15-25 J/m
16 J/m
Flexural Strength
—
80 MPa
Thermal
Glass Transition Temperature
N/A (amorphous)
60 °C
Melting Point
220-240 °C
150 – 160 °C
Continuous Service Temperature
100-140 °C
45 °C
Heat Deflection Temperature
80-100 °C
55 °C
Electrical
Dielectric Constant
2.1-2.2
3.0
Volume Resistivity
>10¹⁶ Ω⋅cm
10¹⁴ Ω·cm
Dielectric Strength
20-30 kV/mm
—
Chemical resistance
Acids
Excellent resistance
Fair
Bases
Excellent resistance
Poor
Solvents
Good resistance at room temp, swells in hot aromatic and chlorinated hydrocarbons
—
UV Resistance
Fair (requires stabilization)
Poor
Alcohols
—
Fair
Hydrolysis
—
Poor
Sustainability
Recyclability
Recyclable
Industrially compostable
Recycling Code
7 (Other)
7
Carbon Footprint
Moderate
~1.6 kg CO₂e / kg
Bio-based Content
—
100 %