Comparison

PMP Transparent High Temp vs Polycarbonate

A side-by-side comparison of Poly(4-methyl-1-pentene) for High-Temperature Transparent Applications and Polycarbonate.

Property

PMP Transparent High Temp

Polycarbonate

Physical

Density

0.830-0.840 g/cm³

1.20 g/cm³

Water Absorption (24h)

<0.01 %

0.15 %

Transparency

Excellent

Transparent (88% light transmission)

Shrinkage

1-3 %

0.5 – 0.8 %

Mechanical

Young's Modulus

1.0-1.5 GPa

2.3 – 2.4 GPa

Tensile Strength

25-35 MPa

60 – 70 MPa

Elongation at Break

10-30 %

100 – 150 %

Impact Strength (Izod)

15-25 J/m

600 – 900 J/m

Flexural Strength

—

90 – 100 MPa

Hardness (Rockwell M)

—

Thermal

Glass Transition Temperature

N/A (amorphous)

147 °C

Melting Point

220-240 °C

—

Continuous Service Temperature

100-140 °C

115 – 130 °C

Heat Deflection Temperature

80-100 °C

130 – 140 °C

Thermal Conductivity

—

0.20 W/m·K

CTE

—

65 – 70 × 10⁻⁶ /K

Electrical

Dielectric Constant

2.1-2.2

2.9 – 3.0

Volume Resistivity

>10¹⁶ Ω⋅cm

10¹⁶ Ω·cm

Dielectric Strength

20-30 kV/mm

15 kV/mm

Chemical resistance

Acids

Excellent resistance

—

Bases

Excellent resistance

Poor

Solvents

Good resistance at room temp, swells in hot aromatic and chlorinated hydrocarbons

—

UV Resistance

Fair (requires stabilization)

Poor (unless coated)

Acids (dilute)

—

Good

Alcohols

—

Fair

Oils

—

Good

Gasoline

—

Fair

Acetone

—

Poor (attacks)

Sustainability

Recyclability

Recyclable

Recycling Code

7 (Other)

Carbon Footprint

Moderate

~5 kg CO₂e / kg

Bio-based Content

—

0 – 50 % (bio grades)