@article { ISI:000277768000019,
	title = {Poly(amideimide)s containing pendant pentadecyl chains: synthesis and characterization},
	journal = {Polymer Degradation and Stability},
	volume = {95},
	number = {5},
	year = {2010},
	month = {MAY},
	pages = {837-844},
	publisher = {ELSEVIER SCI LTD},
	address = {THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND},
	abstract = {<p>A new aromatic diacylhydrazide monomer viz., 4-[4{\textquoteright}-(hydrazinocarbonyl)phenoxy]-2- pentadecylbenzo-hydrazide was synthesized starting from cardanol, which in turn is obtainable from cashew nut shell liquid a renewable resource material. A series of new poly(amideimide)s containing flexibilizing ether linkages and pendant pentadecyl chains was synthesized from 4-[4{\textquoteright}-(hydrazinocarbonyl)phenoxy]-2-pentade-cylbenzohydrazide and commercially available aromatic dianhydrides, viz., benzene-1,2,4,5-tetracarboxylic dianhydride, 3,3{\textquoteright},4,4{\textquoteright}-biphenyltetracarboxylic dianhydride, benzophenone-3,3{\textquoteright},4,4{\textquoteright}-tetracarboxylic dianhydride, 4,4{\textquoteright}-oxydiphthalic anhydride and 4,4{\textquoteright}-(hexafluoro isopropylidene)diphthalic anhydride by a two-step solution polycondensation in N,N-dimethylacetamide via the poly(hydrazide acid) intermediate. Inherent viscosities of poly(amideimide)s were in the range 0.60-0.64 dL/g in N,N-dimethylacetamide at 30 +/- 0.1 degrees C. Poly(amideimide)s could be solution cast into tough, transparent and flexible films from their N,N-dimethylacetamide solutions. The solubility of poly(amideimide)s was significantly improved by incorporation of pendant pentadecyl chains and were found to be soluble in N,N-dimethylacetamide, 1-methyl-2-pyrrolidinone, pyridine and m-cresol at room temperature or upon heating. Wide angle X-ray diffraction patterns of poly(amideimide)s revealed a broad halo at around 2 theta = similar to 19 degrees suggesting that polymers were amorphous in nature. In the small-angle region, diffuse to sharp reflections of a typically layered structure resulting from the packing of pentadecyl side chains were observed. The temperature at 10\% weight loss (T(10)), determined by TGA in nitrogen atmosphere, of poly(amideimide)s was in the range of 388-410 degrees C indicating their good thermal stability. Glass transition temperatures of poly(amideimide)s were in the range 162-198 degrees C. It was observed that the plasticization effect of attached pentadecyl side chains induced the depression of T(g). (C) 2010 Elsevier Ltd. All rights reserved.</p>},
	keywords = {Cardanol, Cashew nut shell liquid, Pentadecyl chains, Plasticization, Poly(amideimide)s, thermal stability},
	issn = {0141-3910},
	doi = {10.1016/j.polymdegradstab.2010.01.030},
	author = {More, Arvind S. and Patil, Anandrao S. and Wadgaonkar, Prakash P.}
}
@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.}
}
