PVDF Properties
PVDF (KYNAR®) is generally used in applications requiring the high purity, strength, and resistance to solvents, acids, bases and heat. Compared to other fluoropolymers, like PTFE, PFA, FEP, it has an easier melt process because of its relatively low melting point of around 177°C.
KYNAR® is a registered trademark of Arkema, Inc
Maximum Usage Temperatures for PVDF
| Lower Chain Length |  | Improved Flow |
| Strong Inter-chain Forces | | Higher Modulus and Strength |
| Alternating C-H and C-F Structures | | Improved Flammability |
PVDF – Poly (vinylidene fluoride) - TYPICAL PROPERTIES
| Property | Value | Units | Method |
| MECHANICAL PROPERTIES | |||
| Tensile Strength, 73°F, at break | 5075 - 7250 35 - 50 | psi MPa | D 638 |
| Elongation at break, 73°F | 20 - 50 | % | D 638 |
| Flexural Strength, 73°F | 2100 11165 | psi MPa | D 790 |
| Impact Strength, Izod, 23 deg C, notched, 4mm thick | 2.25 120 | Ft-lbf/in J/m | D 256 |
| Yield StrengthAt 23 deg C | 7685 - 8265 53 - 57 | psi MPa | D 638 |
| Density | 1.78 | gm/cu.cm | |
| Coefficient of friction, static | 0.2 to 0.4 | D 1894 | |
| THERMAL PROPERTIES | |||
| Coefficient of Linear Expansion | 12 – 14 x 10-5 | K-1 | D 696 |
| Melting Point | 343 173 | deg F deg C | D 3418 |
| Thermal Conductivity | 1.39 0.2 | Btu·in/h·ft2·°F W/m·K | ASTM C 177 |
| Specific Heat, at 300 deg K | 0.287 – 0.382 1.2 – 1.6 | Btu/lb/deg F kJ/Kg/deg K | |
| Heat Distortion Temperature, 66 lb/sq.in (0.455 MPa), 4 mm thick | 293 145 | deg F deg C | D 648 |
| Service Temperature | to 302 to 150 | deg F deg C | |
| Processing Temperature | deg F deg C | ||
| ELECTRICAL PROPERTIES | |||
| Surface Arc-Resistance | sec | D 495 | |
| Volume Resistivity | > 1014 | ohm-cm | D 257/DIN 53483 |
| Surface Resistivity, @ 100% RH | > 1014 | Ohm sq-1 | D 257/DIN 53483 |
| 1MHz, 23 deg C | 7 | ε | D150-81 |
| OTHER PROPERTIES | |||
| Flame Rating+ | V-0 | Class | UL-94 |
| Refractive Index | 1.41 – 1.42 | nD 25 | D 542 |
| Limiting Oxygen Index | 44 | % Oxygen | D 2863 |
| Water Absorption, 230 deg C, 10 Kg | < 0.04 | gm/10 min | D 1238 |
| Specific Gravity | 1.78 | ISO 1183 | |
Value decreases with increasing thickness of test specimen
+ Numerical rating for flame spread is not intended to reflect hazards presented by this or any other material under actual fire conditions
NOTE: The information, recommendations and opinions contained herein is only a guide and is intended solely for your consideration, inquiry and verification. The suitability of any material under specific conditions of application is not guaranteed in any manner. Fluorotherm™ Polymers Inc does not assume legal responsibility for the use of data presented here in any form, under any circumstances, any application, test or communication. Nothing contained herein is to be interpreted as a license or authorization to operate under or infringe any patent.
