Comparison
Chitosan Crosslinked vs PETG
A side-by-side comparison of Chitosan, Crosslinked Grade DD and Polyethylene Terephthalate Glycol.
Physical
Density
1.45 g/cm³
1.27 g/cm³
Water Absorption (24h)
3.0-6.0 %
0.13 %
Transparency
Good
Transparent
Shrinkage
2.5-5.0 %
0.2 – 0.5 %
Mechanical
Young's Modulus
1.5 GPa
2.1 GPa
Tensile Strength
40 MPa
50 MPa
Elongation at Break
4.0 %
120 %
Impact Strength (Izod)
0.3 J/cm
100 J/m
Flexural Strength
—
70 MPa
Thermal
Glass Transition Temperature
90-130 °C
80 °C
Melting Point
None (degrades)
—
Continuous Service Temperature
70 °C
65 °C
Heat Deflection Temperature
60 °C
70 °C
CTE
—
68 × 10⁻⁶ /K
Electrical
Dielectric Constant
4.8
3.3
Volume Resistivity
10¹¹ Ω·cm
10¹⁴ Ω·cm
Dielectric Strength
16 kV/mm
—
Chemical resistance
Acids
Soluble in dilute acids
Good
Bases
Good resistance
Fair
Solvents
Reduced solubility in acidic solutions due to crosslinking
—
UV Resistance
Poor
Fair
Alcohols
—
Good
Oils
—
Good
Sustainability
Recyclability
Biodegradable (compost)
Recyclable
Recycling Code
7 (Other)
1
Carbon Footprint
Low (utilizes waste streams)
~2.7 kg CO₂e / kg
Bio-based Content
—
0 %