@article { ISI:000243650800011,
	title = {High-temperature, polymer-graphite hybrid composites for bipolar plates: effect of processing conditions on electrical properties},
	journal = {Journal of Power Sources},
	volume = {163},
	number = {2},
	year = {2007},
	month = {JAN},
	pages = {702-707},
	publisher = {ELSEVIER SCIENCE BV},
	type = {Article},
	address = {PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS},
	abstract = {<p>High-temperature thermoplastic-graphite composites are prepared using polyphenylene sulfide (PPS) and polyether sulfone (PES) containing natural graphite powder. All samples are prepared by high pressure compaction and heating to high temperatures. The effect of a third additional conducting component on the electrical resistance of these composites is studied. A low resistance of the order of 0.1 Omega can be obtained even for a graphite concentration of 50\% by addition of the third component. The effect of a mixing/blending technique on the anisotropy of conductivity is investigated. Solution blending of PES with graphite leads to lower anisotropy values than powder mixing and compression moulding. The samples when exposed continuously to a working temperature of 100 degrees C give a small but significant reduction in electrical resistance. X-ray diffraction studies on composites prepared by different techniques indicate that there is restructuring and crystallite re-orientation of the graphite phase in the samples. A large reduction in the crystallite size is observed for samples prepared by solution blending while re-orientation occurs after heat treatment. The changes in electrical properties can be correlated with these structural transformations in the composites. (c) 2006 Elsevier B.V. All rights reserved.</p>},
	keywords = {bipolar plates, conducting polymer, fuel cell, graphite composites, hybrid materials, polyether sulfone, polypherylene sulfide},
	issn = {0378-7753},
	doi = {10.1016/j.jpowsour.2006.08.019},
	author = {Radhakrishnan, S. and Ramanujam, B. T. S. and Adhikari, Arindam and Sivaram, S.}
}
@article { ISI:000350247300002,
	title = {High molecular weight polylactic acids by polyesterification using diisopropylcarbodiimide (DIPC) and 4-(dimethylamino) pyridinium ptoluene sulfonate (DPTS)},
	journal = {Polymer Bulletin	},
	volume = {72},
	number = {3},
	year = {2015},
	month = {MAR},
	pages = {405-415},
	publisher = {SPRINGER},
	address = {233 SPRING ST, NEW YORK, NY 10013 USA},
	abstract = {<p>High molecular weight poly(l-lactic acid) has been prepared from the corresponding functionally terminated oligomers employing a polyesterification method at room temperature using diisopropylcarbodiimide and 4-(dimethylamino) pyridinium-p-toluene sulfonate. Self-condensation of hydroxyl and carboxylic acid-terminated poly(l-lactic acid) oligomers (M (n) : similar to 1,000) resulted in polymers with high molecular weights (M (n) \&gt; 45,000) under mild conditions. End-group analysis by MALDI-TOF provided evidence for N-acylurea formation in the product under the reaction conditions employed.</p>},
	issn = {0170-0839},
	doi = {10.1007/s00289-014-1285-0},
	author = {Shyamroy, S. and Garnaik, Baijayantimala and Sivaram, S.}
}
