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OCTOBER 2002
Summary of Physical Properties of MP-1 Polyimide
(Gamma irradiated at 5Mrad)
MP-1 is a high crosslinked thermoset polymer. Recently approved as a biocompatible material according to ISO 10993-1
Summary of Physical Properties of MP-1 Polyimide
|
Property |
Test Method |
MP-1 Polyimide |
|
Density |
ASTM D 792 |
1.38-1.42 g/cm3 |
|
Hardness |
ASTM D 735 |
89 SD |
|
Tensile strength |
ASTM D 638 |
108.7 ± 8 MPa |
|
Tensile elongation |
ASTM D 638 |
Yield: 3.3 ± 0.2 % Break: 8.9 ± 1.5% |
|
Tensile modulus |
ASTM D 638 |
3748 ± 52 MPa |
|
Compression strength (@ 10%) |
ASTM D 694 |
161.4 ± 2.3 MPa |
|
Compression modulus |
ASTM D 695 |
3578 ± 357 MPa |
|
Flexural Strength |
ASTM D 790 |
111.6 ± 10.9 MPa |
|
Flexural Modulus |
ASTM D 790 |
4273 ± 177 MPa |
|
Impact strength (Charpy method, Izod notched) |
ASTM D 256 |
1.647 ± 0.047 ft*lb/in |
|
Tg |
DMA TMA |
311 ° C 315 ° C |
|
Tm |
DSC DMA TMA |
414 ° C 408° C 412° C |
|
Melt energy |
DSC |
29.78 J/g |
|
Crystallinity % |
X-ray analysis |
7.66% |
|
Coefficient of thermal expansion |
DMA |
T < Tg 48 x 10-6 T > Tg 117 x 10-6 |
|
Td weight loss(%)
|
TGA Weight loss(%) |
T < 450 °C: 0% T = 536° C: 1.6% T = 650° C: 30% T = 800°C: 38% T = 936° C: 42% |
|
Abrasion coefficient |
N/A |
2.129 cm3*105/kg.m.hr |
|
Water absorption (@80°C, %) |
ASTM C-20 |
0.014 |
|
Porosity |
ASTM C20 |
0.018 |
|
Poisson Ratio |
N/A |
0.333 |
|
Dielectric strength (11.76 GHZ) |
„� = 2.907 δ = 0.001 |
*DMA: Dynamic Mechanical Analysis; TMA: Thermal Mechanical Analysis; TGA: Thermo Gravimetric Analysis
In addition to the physical properties summarized above, photo-acoustic Fourier Transform Infrared Analysis was performed on specimens before and after irradiation. This analysis demonstrated the presence of the following chemical groups: C‑H, imide, aromatic, and ether. Irradiation did not alter the characteristic peaks.
Creep and fatigue tests were performed with ultimate results(will be supplied upon request and NDA signing).
Stability test of immersed samples (5 Mrad irradiated) in saline 70 Deg C for 60 days showed no deterioration of physical properties(Report will be supplied upon request).