@article { ISI:000276284200019,
	title = {Synthesis and characterization of polyamides containing pendant pentadecyl chains},
	journal = {European Polymer Journal},
	volume = {46},
	number = {3},
	year = {2010},
	month = {MAR},
	pages = {557-567},
	publisher = {PERGAMON-ELSEVIER SCIENCE LTD},
	address = {THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND},
	abstract = {<p>A new aromatic diacid monomer viz., 4-(4{\textquoteright}-carboxyphenoxy)-2-pentadecylbenzoic acid was synthesized starting from cardanol and was characterized by FTIR, (1)H- and (13)C NMR spectroscopy. A series of new aromatic polyamides containing ether linkages and pendant pentadecyl chains was prepared by phosphorylation polycondensation of 4-(4{\textquoteright}-carboxyphenoxy)-2-pentadecylbenzoic acid with five commercially available aromatic diamines viz., 1,4-phenylenediamine, 4,4{\textquoteright}-oxydianiline, 4,4{\textquoteright}-methylenedianiline, 1,3-phenylenediamine, and 4,4{\textquoteright}-(hexafluoroisopropylidene)dianiline. Inherent viscosities of the polyamides were in the range 0.45-0.66 dL/g in N,N-dimethylacetamide at 30 +/- 0.1 degrees C. The introduction of ether linkages and pendant pentadecyl chains into polyamides led to an enhanced solubility in N,N-dimethylacetamide and 1-methyl-2-pyrrolidinone at room temperature or upon heating. The polyamides could be solution-cast into tough, flexible and transparent films from their N,N-dimethylacetamide solution. Wide angle X-ray diffraction patterns exhibited broad halo indicating that the polymers were essentially amorphous in nature. X-Ray diffractograms also displayed a diffuse to sharp reflection in the small-angle region (20 = similar to 2-5 degrees) for the polyamides characteristics of formation of loosely to well-developed layered structure arising from packing of flexible pentadecyl chains. The glass transition temperature observed for the polyamides was in range 139-189 degrees C. The temperature at 10\% weight loss (T(10)), determined by TGA in nitrogen atmosphere, of the polyamides was in the range 425-453 degrees C indicating their good thermal stability. (C) 2009 Elsevier Ltd. All rights reserved.</p>},
	keywords = {alkyl side-chain, Cardanol, Cashew nut shell liquid, Pentadecyl chains, polyamides},
	issn = {0014-3057},
	doi = {10.1016/j.eurpolymj.2009.11.014},
	author = {More, Arvind S. and Pasale, Sharad K. and Wadgaonkar, Prakash P.}
}
