02210nas a2200265   4500008004100000022001400041245010700055210006900162260000900231300000700240490000700247520130000254653002401554653002401578653001501602653002201617100002501639700002801664700002401692700002601716700002901742700002301771700002801794856012201822       2017                        eng d  a1022-976000aAromatic polyesters containing pendent 4-(phenylsulfonyl)phenyl groups: synthesis and characterization0 aAromatic polyesters containing pendent 4phenylsulfonylphenyl gro  cMAR   a570 v243 a<p>A new bisphenol, 1,1-bis-[(4-hydroxyphenyl)-1-(4-phenylsulfonyl) phenyl)] ethane (DPSBP) was synthesized starting from diphenylsulfide and was characterized by spectroscopic methods. DPSBP was polycondensed with isophthalic acid chloride (IPC), terephthalic acid chloride (TPC) and a mixture of IPC and TPC (50: 50 mol%) by phase-transfer catalysed interfacial polymerization method to obtain aromatic polyesters containing pendent 4-(phenylsulfonyl)phenyl groups. A series of copolyesters was also obtained by polycondensation of varying molar proportions of DPSBP and bisphenol-A (BPA) with TPC. (Co) polyesters exhibited inherent viscosities in the range 0.56-1.57 dLg(-1) and number average molecular weights (Mn) were in the range 28,650-80,230 g/mol. Polyesters dissolved readily in common organic solvents such as dichloromethane, chloroform, tetrahydrofuran and aprotic polar solvents such as N-methylpyrrolidone, and N, N-dimethylacetamide. Tough, transparent and flexible films of polyesters could be cast from their chloroform solutions. X-Ray diffraction studies indicated amorphous nature of aromatic polyesters. Polyesters showed T-g values in the range 223-257 degrees C while T-10 values were in the range of 469-484 degrees C indicating their excellent thermal stability.</p>10aAromatic polyesters10aBulky pendent group10asolubility10athermal stability1 aBapat, Snehalata, P.1 aJadhav, Sushilkumar, A.1 aValsange, Nitin, G.1 aTawade, Bhausaheb, V.1 aHonkhambe, Pandurang, N.1 aChavan, Nayaku, N.1 aWadgaonkar, Prakash, P.  uhttps://library.ncl.res.in/content/aromatic-polyesters-containing-pendent-4-phenylsulfonylphenyl-groups-synthesis-and01618nas a2200181   4500008004100000022001400041245006400055210006300119260000900182300001200191490000600203520104000209100002101249700002001270700002301290700002801313856009501341       2018                        eng d  a2045-985800aChitosan-based bionanocomposites for biomedical application0 aChitosanbased bionanocomposites for biomedical application  cDEC   a219-2270 v73 aNatural polymers have greatly impacted the advancement of modern medicine. Natural polymer-based biomaterials are biodegradable. A significant advantage of natural polymers is that they can be broken down and removed from the body after they have served their function. A wide range of novel biomaterials from natural polymers has been investigated to meet new challenges in medical science. Chitosan is one of the natural polymers which have been widely used in the biomedical field. Nanotechnology is one of the most popular areas of current research. In the area of nanotechnology, polymer and metal/metal oxide nanoparticle matrix-based nanocomposites have generated a significant amount of attention in the recent literature. These bionanocomposites have wide-ranging applications in drug delivery and tissue engineering. This paper discusses polymer-metal/metal oxide nanoparticle matrix-based nanocomposite biomaterials and their applications in the biomedical field - that is, drug delivery and tissue engineering applications.1 aKumari, Sangeeta1 aSingh, Raj, Pal1 aChavan, Nayaku, N.1 aAnnamalai, Pratheep, K.  uhttps://library.ncl.res.in/content/chitosan-based-bionanocomposites-biomedical-application02087nas a2200241   4500008004100000245011400041210006900155260000800224300000900232490000700241520123200248653001301480653002401493653003401517653002901551653003101580100002101611700002001632700002301652700002401675700001901699856012701718       2021                        eng d00aCharacterization of a novel nanocomposite film based on functionalized chitosan-Pt-Fe3O4 hybrid nanoparticles0 aCharacterization of a novel nanocomposite film based on function  cMAY  a12750 v113 a<p>The development of organic-inorganic hybrids or nanocomposite films is increasingly becoming attractive in light of their emerging applications. This research focuses on the formation of a unique nanocomposite film with enhanced elasticity suitable for many biomedical applications. The physical property measurement system and transmission electron microscopy were used to analyze Pt-Fe3O4 hybrid nanoparticles. These nanohybrids exhibited magnetic effects. They were further exploited to prepare the nanocomposite films in conjunction with a chitosan-g-glycolic acid organic fraction. The nanocomposite films were then examined using standard techniques: thermogravimetric analysis, X-ray diffraction, Fourier transform infrared spectroscopy, and atomic force microscopy. Tensile strength testing demonstrated a significantly greater elastic strength of these nanocomposite films than pure chitosan films. The water absorption behavior of the nanocomposites was evaluated by measuring swelling degree. These nanocomposites were observed to have substantially improved physical properties. Such novel nanocomposites can be extended to various biomedical applications, which include drug delivery and tissue engineering.</p>10aChitosan10ananocomposite films10aPt-Fe3O4 hybrid nanoparticles10atensile strength testing10aThermogravimetric analysis1 aKumari, Sangeeta1 aSingh, Raj, Pal1 aChavan, Nayaku, N.1 aSahi, Shivendra, V.1 aSharma, Nilesh  uhttps://library.ncl.res.in/content/characterization-novel-nanocomposite-film-based-functionalized-chitosan-pt-fe3o4-hybrid