@article { ISI:000257321700001, title = {Poly(4-methyl-1-pentene)/MWNT nanocomposites}, journal = {E-Polymers}, year = {2008}, month = {JUL}, pages = {079}, publisher = {EUROPEAN POLYMER FEDERATION}, address = {1, QUAI LEZAY-MARNESIA, F067000 STRASBOURG, FRANCE}, abstract = {

Nanocomposites of poly(4-methyl-1-pentene) (PMP) with various weight fractions of multiwall carbon nanotubes (MWNT{\textquoteright}s) were prepared by melt compounding. The nanocomposites are characterized for structure using scanning electron microscopy. The viscoelastic behavior of the nanocomposites is investigated in solid as well as melt state. The study reveals a significant increase in storage modulus especially in the rubbery regime of the polymer matrix and reduced tan delta. Rheological properties in melt show that the complex viscosity and shear storage modulus are increased as a result of incorporation of MWNT. A systematic decrease in the cross over frequency is noted which is attributed to the increased relaxation time. In dielectric analysis, composition dependent enhanced permittivity and conductivity are observed. The thermal stability of the polymer is found to be significantly improved in presence of MWNT{\textquoteright}s.

}, issn = {1618-7229}, author = {Patil, Prashant A. and Wanjale, Santosh D. and Jog, Jyoti Prakash} } @article { ISI:000263687000002, title = {Preparation and characterization of electrospun fibers of nylon 11}, journal = {Express Polymer Letters}, volume = {2}, number = {8}, year = {2008}, month = {AUG}, pages = {540-545}, publisher = {BUDAPEST UNIV TECHNOL \& ECON}, address = {DEPT POLYMER ENG, MUEGYETEM RKP 3, BUDAPEST, H-1111, HUNGARY}, abstract = {

Nylon 11 nanofibers mats were successfully prepared by electrospinning process from formic acid solution. The scanning electron microscopy (SEM) images showed that nanofibers with uniform diameter were produced when the polymer concentration was 10\% w/v, whereas ribbons were formed at a higher concentration. The crystalline structure of the nanofibers mats was investigated using X-ray diffraction (XRD) and it was found that the nanofibers mats crystallized in gamma form. The melt crystallized as well as solution casted films however exhibited a form. The thermal properties of these samples were studied using differential scanning calorimetry (DSC) and it was observed that electrospun fibers showed higher crystallinity than the melt-crystallized samples. However, the crystallinity of electrospun fibers was lower than the solution-crystallized sample.

}, keywords = {biocompatible polymers, electrospinning, Nanomaterials, Nylon 11}, issn = {1788-618X}, doi = {10.3144/expresspolymlett.2008.65}, author = {Dhanalakshmi, M. and Jog, Jyoti Prakash} } @article { ISI:000282201200049, title = {Production and characterization of a biodegradable poly (hydroxybutyrate-co-hydroxyvalerate) (PHB-co-PHV) copolymer by moderately haloalkalitolerant Halomonas campisalis MCM B-1027 isolated from Lonar Lake, India}, journal = {Bioresource Technology}, volume = {101}, number = {24}, year = {2010}, month = {DEC}, pages = {9765-9771}, publisher = {ELSEVIER SCI LTD}, address = {THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND}, abstract = {

Several microorganisms produce polyhydroxyalkanoates (PHA). They are accumulated intracellularly as energy storage compounds. The PHAs are of interest because of their potential in biomedical applications. Halophilic bacteria and archaea are known to produce polyhydroxybutyrate (PHB). This paper describes production of a biodegradable copolymer, PHB-co-PHV by a moderately haloalkalitolerant Halomonas campisalis, isolated from Lonar Lake, India. The production of PHA was in the range of 45-81\% on dry cell weight basis when the organism was grown in a production medium containing 1\% (w/v) maltose and 0.1\% (w/v) yeast extract, at pH ranging from 6 to 9 with an inoculum density of 10(5)-10(7) cells/ml of medium, for incubation period of 15-30 h and at 37 degrees C. The polymer produced by the organism is a hydroxyester with molecular weight of 1.3014 x 10(6). Its melting temperature was 171 degrees C. The (1)H NMR analysis revealed that the polymer was a copolymer of PHB-co-PHV. This could be achieved by providing simple carbon source viz. maltose. (C) 2010 Elsevier Ltd. All rights reserved.

}, keywords = {Biodegradable plastics, Halomonas campisalis, Polyhydroxyalkanoates}, issn = {0960-8524}, doi = {10.1016/j.biortech.2010.07.089}, author = {Kulkarni, S. O. and Kanekar, Pradnya P. and Nilegaonkar, S. S. and Sarnaik, S. S. and Jog, Jyoti Prakash} }