ISSN:
1013-9826
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
The thin polymer composite bipolar plates (the thickness 〈 1.5 mm) for use in polymerelectrolyte membrane fuel cells (PEMFCs) containing vinyl ester resin, graphite [removed info] powder,organoclay have been fabricated by bulk molding compound (BMC) process. Organoclay preparedby ionic exchange of montmorillonite (MMT) with three different Mw of diamine intercalatingagents was used to reinforce the mechanical properties of the composite bipolar plates. Resultsindicate that the basal spacing and content of MMT varied with Mw of POP-diamines are critical indetermining the resultant mechanical properties for bipolar plates. The flexural strength and theunnotched impact strength of the plate were ca. 38 % (from 30.21 MPa to 45.66 MPa) and ca. 30 %(from 58.11 J/m to 80.21 J/m) higher than the pristine graphite plate, respectively, as the basalspacing of MMT (2 phr) was increased from 1.71 to 5.43 nm. The limiting oxygen index (L.O.I.)and the UL-94 test revealed that the bipolar plate possesses excellent flame retardant with L.O.I.higher than 50 and UL-94-V0. In addition, the electrical conductivity of the bipolar plates withdifferent MMT contents and basal spacing of MMT is higher than 100 S/cm
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/53/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.334-335.941.pdf
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