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Bulk Molding Compounds BMC 940 Vinyl Ester Bipolar Plate Material
| Category | Polymer , Thermoset , Vinyl Ester |
| Manufacturer | BMC - Bulk Molding Compounds Inc. |
| Trade Name | BMC |
| Port | Ningbo port,China |
| Trade Terms | FOB, CFR, CIF |
| Payment Terms | L/C, T/T, Western Union |
| Download PDF | Bulk Molding Compounds BMC 940 Vinyl Ester Bipolar Plate Material.pdf  |
| Price | EMAIL US sales@lookpolymers.com |
Material Notes:
Product Introduction: Bulk Molding Compounds, Inc. is the largest manufacturer of thermoset bulk molding compounds in North America, serving the automotive, appliance, and electrical markets. BMC thermosets are the most cost-effective plastic products on the market today. The process of manufacturing BMC thermosets is geared toward high-volume, automated systems to ensure the highest quality at the lowest possible cost. BMC thermosets can be designed to conduct electricity for use in applications such as bipolar plates that are used in fuel cells. A fuel cell is an electro-chemical device capable of generating electricity from oxygen and hydrogen. BMC has developed a cost-effective product for use in bipolar plates within direct methanol fuel cell stacks (DMFC). This material utilizes a special vinyl ester resin that is resists up to 100% methanol immersion at 65°C.Information provided by Bulk Molding Compounds
| Physical Properties | Metric | English | Comments |
|---|---|---|---|
| Specific Gravity | 1.89 g/cc | 1.89 g/cc | ASTM D792 |
| Water Absorption | <= 0.060 % @Temperature 23.0 °C, Time 86400 sec |
<= 0.060 % @Temperature 73.4 °F, Time 24.0 hour |
ASTM D570 |
| Linear Mold Shrinkage | 0.00080 cm/cm | 0.00080 in/in | ASTM D955 |
| Mechanical Properties | Metric | English | Comments |
|---|---|---|---|
| Tensile Strength at Break | 28.0 MPa | 4060 psi | ASM D638 |
| Tensile Modulus | 9.50 GPa | 1380 ksi | ASTM D638 |
| Flexural Yield Strength | 38.0 MPa | 5510 psi | ASTM D790 |
| Flexural Modulus | 10.5 GPa | 1520 ksi | ASTM D790 |
| Thermal Properties | Metric | English | Comments |
|---|---|---|---|
| Specific Heat Capacity | 0.846 J/g-°C | 0.202 BTU/lb-°F | E1461-92 |
| Thermal Conductivity | 13.4 W/m-K | 93.0 BTU-in/hr-ft²-°F | |
| Glass Transition Temp, Tg | 189 °C | 372 °F | |
| Flammability, UL94 | V-0 @Thickness 3.56 mm |
V-0 @Thickness 0.140 in |
| Electrical Properties | Metric | English | Comments |
|---|---|---|---|
| Volume Resistivity | 0.0143 ohm-cm | 0.0143 ohm-cm | In Plane (X,Y direction) |
| 0.03125 ohm-cm | 0.03125 ohm-cm | Through Plane (Z direction) |
| Processing Properties | Metric | English | Comments |
|---|---|---|---|
| Mold Temperature | 149 - 160 °C | 300 - 320 °F | |
| Cure Time | 0.500 - 1.00 min | 0.00833 - 0.0167 hour |
| Descriptive Properties | Value | Comments |
|---|---|---|
| Diffusivity | 0.0889 cm2/s | |
| DMA-Modulus | 13.8 | @ 25°C, ASTM D4065 |
| 3.1 | @ 200°C, ASTM D4065 | |
| 5.4 | @ 175°C, ASTM D4065 | |
| 6.8 | @ 150°C, ASTM D4065 | |
| 9.6 | @ 100°C, ASTM D4065 | |
| Flowability | 270 cm2 | |
| Post bake, 350°F | 15 mins | after reaching 350°f |
| Press Close Speed | <2 sec | after material begins flowing |
| Recommended tonnage | >40 Mpa | on projected part area |
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