VECTRAN™ HT has excellent thermal properties, especially in regard to thermal loading.
Fiber thermal properties
VECTRAN™ | Aramid | |||
---|---|---|---|---|
HT | UM | Standard | High Modulus | |
LOI | 28 | 30 | 30 | 30 |
M.P., °C | None | 350 | None | None |
HAS (hot-air shrink, 180°C, 30 minutes), % | < 0.2 | < 0.1 | < 0.2 | < 0.1 |
BWS (boiling water shrinkage, 100°C, 30 minutes), % | < 0.2 | < 0.1 | < 0.2 | < 0.1 |
50% Strength Retention Temperature, °C | 145 | 150 | 400 | 230 |
TGA (20% weight loss), °C | > 450 | > 450 | > 450 | > 450 |
Equilibrium moisture regain
Temperature (°C) |
Relative Humidity (%) |
VECTRAN™ | Aramid | ||
---|---|---|---|---|---|
HT | UM | Standard | High Modulus | ||
20 | 65 | < 0.1 | < 0.1 | 4.2 | 4.1 |
20 | 80 | < 0.1 | < 0.1 | 4.8 | 4.8 |
20 | 90 | < 0.1 | < 0.1 | 5.4 | 5.5 |
VECTRAN™ at high temperature
Mechanical property retention during or after thermal exposure is a key concern in many applications. The tensile strength of VECTRAN™ at temperature should be used as a reference in selecting process conditions.
VECTRAN™ after thermal exposure
For high temperature processing at low mechanical load, VECTRAN™ will have excellent strength after processing, superior to aramids.
VECTRAN™ resistance to cyclic thermal loads
The resistance of VECTRAN™ to cyclic thermal loads at higher temperatures is superior to aramids and increases product lifetimes.
VECTRAN™ thermal properties at low temperature
Evaluated by ILC Dover during the design of the airbag system for the 1997 Mars Pathfinder mission, ILC reported VECTRAN™ increased in strength in tests at –62°C, leading to its selection for the airbag fabric and external assembly tendons.
VECTRAN™ HT CTE at various temperatures
Temperature Range | Fiber Longitudinal Direction CTE (m/m- °C x 10-06) |
|
---|---|---|
VECTRAN™ HT | Standard Aramid | |
–150 to 100°C | –4.8 | –4.9 |
100 to 200°C | –11.6 | –5.8 |
Thermal conductivity of VECTRAN™ HT
Direction | Temperature °C | Density g/cm3 |
Specific Heat J/kg-°K |
Thermal Conductivity | ||
---|---|---|---|---|---|---|
W/m-°K | 10-3 cal/cm-sec-°C | |||||
VECTRAN™ HT | Longitudinal | 23 | 1.4 | 1100 | 1.5 | 3.5 |
100 | 1.4 | 1420 | 2.0 | 4.7 | ||
Standard Aramid | Longitudinal | 23 | 144 | 1230 | 2.5 | 5.9 |