02067nas a2200277 4500008004100000022001400041245017900055210006900234260006700303300001400370490000800384520105500392653001101447653001501458653001601473653001301489100001601502700002601518700001801544700002101562700001801583700001701601700002101618700002301639856012701662 2013 eng d a0021-899500aCopolymerization of ethylene with unsaturated alcohols and methylmethacrylate using a silylated alpha-diimine nickel catalyst: molecular modeling and photodegradation studies0 aCopolymerization of ethylene with unsaturated alcohols and methy a111 RIVER ST, HOBOKEN 07030-5774, NJ USAbWILEY-BLACKWELLcAUG a1820-18320 v1293 a

In this article, the experimental results obtained in the copolymerization of ethylene with polar monomers using a silylated -diimine nickel catalyst are described and compared with those obtained with a non-silylate similar one. The results show that the introduction of a siliyl group in the para-position of the imine moiety turns the catalyst less sensitive toward polar functionalities. However, the reactivity observed in copolymerization reactions was found to be reduced both the global polymerization and incorporation rates. Molecular modeling calculation allowed us to understand both the preferred insertion mode and the intermediate product structures for E/MMA copolymerization. Photodegradation studies showed that the presence of polar groups in the copolymers increases their rate of oxidation and turn them more easily degradable. The stabilization performed by Tinuvin 770 showed that for long-exposure times, it is not very effective regardless it is only mixed or grafted to the copolymer. (c) 2012 Wiley Periodicals, Inc.

10aageing10acopolymers10aDegradation10agrafting1 aMatos, Ines1 aFernandes, Susete, N.1 aLiu, Hua-Rong1 aTevtia, Amit, K.1 aSingh, R., P.1 aManda, Lemos1 aLemos, Francisco1 aMarques, Maria, M. uhttps://library.ncl.res.in/content/copolymerization-ethylene-unsaturated-alcohols-and-methylmethacrylate-using-silylated-001927nas a2200229 4500008004100000022001400041245007200055210006900127260006700196300001000263490000800273520116600281653001501447653001501462653001701477653001301494653002701507100001701534700002501551700001901576856010201595 2016 eng d a0021-899500aSelective solid-phase extraction of metal for water decontamination0 aSelective solidphase extraction of metal for water decontaminati a111 RIVER ST, HOBOKEN 07030-5774, NJ USAbWILEY-BLACKWELLcJAN a428490 v1333 a

Metal-contaminated industrial effluent is a major concern for human health. Therefore, the removal of metal is of primary importance. In this study, metals were selectively extracted from water. Selective metal recovery was studied with a crown-ether-based polymer, wherein the selectivity was observed for strontium over lead. Parameters influencing the metal recovery, such as the contact time, adsorbent dosage, and metal-ion concentration, were evaluated. Interestingly, the adsorption rate of strontium was exponentially increased for the initial 4 h, and lead was adsorbed exponentially after 6 h. Notably, 98% strontium adsorption and 64% lead adsorption were obtained in 24 h. The Langmuir adsorption isotherm was in good agreement and demonstrated that the reactive sites of the adsorbent were homogeneous with monolayer metal adsorption with an adsorbent. The Freundlich adsorption isotherm was not obeyed by both metals. The pseudo-first-order and pseudo-second-order kinetics indicated that strontium was adsorbed by chemisorption and lead was adsorbed by physisorption. (c) 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016, 132, 42849.

10aAdsorption10acopolymers10acrosslinking10akinetics10aradical polymerization1 aMane, Sachin1 aPonrathnam, Surendra1 aChavan, Nayaku uhttps://library.ncl.res.in/content/selective-solid-phase-extraction-metal-water-decontamination-102096nas a2200229 4500008004100000022001400041245020100055210006900256260006700325490000800392520112200400653001801522653001501540653003801555653002601593653003201619100002201651700002401673700002301697700002501720856012101745 2016 eng d a0021-899500aSynthesis and characterization of well-defined random and block copolymers of epsilon-caprolactone with l-lactide as an additive for toughening polylactide: Influence of the molecular architecture0 aSynthesis and characterization of welldefined random and block c a111 RIVER ST, HOBOKEN 07030-5774, NJ USAbWILEY-BLACKWELLcAPR0 v1333 a

Well-defined multiarmed star random and block copolymers of epsilon-caprolactone with l-lactide with controlled molecular weights, low polydispersities, and precise numbers of arms were synthesized by the ring-opening polymerization of respective cyclic ester monomers. The polymers were characterized by H-1-NMR and C-13-NMR to determine their chemical composition, molecular structure, degree of randomness, and proof of block copolymer formation. Gel permeation chromatography was used to establish the degree of branching. Star-branched random copolymers exhibited lower glass-transition temperatures (T-g's) compared to a linear random copolymer. When the star random copolymers were melt-blended with poly(l-lactic acid) (PLA), we observed that the elongation of the blend increased with the number of arms of the copolymer. Six-armed block copolymers, which exhibited higher T-g's, caused the maximum improvement in elongation. In all cases, improvements in the elongation were achieved with no loss of stiffness in the PLA blends. (c) 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016, 133, 43267.

10abiodegradable10acopolymers10adifferential scanning calorimetry10amechanical properties10aring-opening polymerization1 aDeokar, Megha, D.1 aIdage, Susheela, B.1 aIdage, Bhaskar, B.1 aSivaram, Swaminathan uhttps://library.ncl.res.in/content/synthesis-and-characterization-well-defined-random-and-block-copolymers-epsilon-002027nas a2200193 4500008004100000022001400041245011000055210006900165260000800234300002600242490000800268520132900276653001501605653002501620653002101645100002001666700002501686856012201711 2019 eng d a0021-899500aFlocculation of kaolin from aqueous suspension using low dosages of acrylamide-based cationic flocculants0 aFlocculation of kaolin from aqueous suspension using low dosages cAPR aArticle Number: 472860 v1363 a

Flocculation of kaolin from aqueous streams has become very important in view of its wide range of applications. In this work, cationic flocculants based on copolymers of acrylamide (AM) and 3-acrylamidopropyltrimethylammonium chloride (APTMAC) were synthesized with two different mole ratios of monomers, 80 mol % of AM (CP-8020) and 40 mol % of AM (CP-4060). The chemical structures of copolymers were confirmed by H-1 and carbon-13 nuclear magnetic resonance (C-13 NMR) spectroscopy. The molecular weight (MW) and zeta potential of the copolymers were determined. High MW was obtained for copolymer with high content of AM (CP-8020) and high zeta potential was observed for copolymer with high content of APTMAC (CP-4060). Flocculation of kaolin suspension was performed using both CP-8020 and CP-4060 and the flocculation was correlated to the zeta potential and MW of the copolymers. The optimum dosages of flocculants were determined. The mechanism of flocculation was discussed in terms of charge neutralization and bridging. The flocs of kaolin were characterized in terms of moisture content and size. To the best of our knowledge, this copolymer system was used for the first time for kaolin flocculation and found out to be efficient. (c) 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47286.

10acopolymers10ahydrophilic polymers10apolyelectrolytes1 aSuresha, P., R.1 aBadiger, Manohar, V. uhttps://library.ncl.res.in/content/flocculation-kaolin-aqueous-suspension-using-low-dosages-acrylamide-based-cationic00723nas a2200205 4500008004100000022001400041245010400055210006900159260000900228300001600237490000700253653000900260653001500269653001900284653002200303100001600325700003000341700001700371856012900388 2024 eng d a1944-824400aBiocompatible PVAc-g--PLLA acrylate polymers for DLP 3D printing with tunable mechanical properties0 aBiocompatible PVAcgPLLA acrylate polymers for DLP 3D printing wi cOCT  a62594-626050 v1610aacid10acopolymers10apolymerization10aTACONIC ANHYDRIDE1 aPal, Shibam1 aGavhane, Utreshwar, Arjun1 aAsha, S., K. uhttps://library.ncl.res.in/content/biocompatible-pvac-g-plla-acrylate-polymers-dlp-3d-printing-tunable-mechanical-properties02091nas a2200265 4500008004100000022001400041245012200055210006900177260000800246490000800254520116300262653001501425653002101440653003701461653002401498100002701522700001901549700001701568700001901585700002601604700002401630700002501654700002301679856012301702 2026 eng d a0021-899500aInsight Into the Influence of Salinity on Flow and Flocculation Behavior of Acrylamide-Based Cationic Polyelectrolyte0 aInsight Into the Influence of Salinity on Flow and Flocculation  cMAR0 v1433 a

The viscometric behavior of aqueous solutions of acrylamide and acrylamidopropyl trimethylammonium chloride copolymers (AM-co-APTMAC) with varying cationic content under different salinity conditions was studied. Viscometric measurements were employed to determine intrinsic viscosity and quantify the influence of electrostatic interactions on chain conformation. Rheology experiments were performed to probe dynamic flow behavior under shear to obtain insights into polyelectrolyte viscoelastic properties under conditions mimicking industrial processes. Viscometric and rheology data analysis is augmented with insights from NMR relaxation and pulsed field gradient NMR diffusion experiments. Further, flocculation of kaolin suspensions was studied using aqueous solutions of AM-co-APTMAC copolymers with different charge fractions in the presence and absence of salt. The physicochemical insights on the behavior of AM-co-APTMAC polyelectrolytes in solution from this study could be relevant in practical applications, such as plants that use seawater or in cases where the ionic strength of suspensions is high due to salinity in the medium.

10acopolymers10apolyelectrolytes10astructure property relationships10atheory and modeling1 aRanganath, Suresha, P.1 aKurian, Rachna1 aTorris, Arun1 aKhairnar, Ajay1 aRavindranathan, Sapna1 aRajamohanan, P., R.1 aBadiger, Manohar, V.1 aWolf, Bernhard, A. uhttps://library.ncl.res.in/content/insight-influence-salinity-flow-and-flocculation-behavior-acrylamide-based-cationic02255nas a2200277 4500008004100000022001400041245012900055210006900184260000800253300001100261490000800272520131600280653001801596653001501614653001801629653002601647653001701673653001301690653001801703653002101721100002601742700002901768700002401797700002601821856013001847 2026 eng d a0021-899500aRedox- and pH-responsive block copolymer nanocarriers with dual drug conjugation through dynamic covalent and hydrogen bonds0 aRedox and pHresponsive block copolymer nanocarriers with dual dr cMAR ae702050 v1433 a

Loading of multiple drugs in a nanocarrier with high entrapment efficiency is important for combination therapy in cancer treatment. Here, a block copolymer comprising hydrophobic poly(epsilon-caprolactone) block with a defined number of pendent propargyl groups, polyethylene glycol monomethyl ether as a hydrophilic block, and a redox-responsive disulfide group at the block junction is synthesized using click chemistry and ring-opening polymerization (ROP). Benzaldehyde and thymine groups are introduced in the side chains for selective attachment of anti-cancer drugs, doxorubicin (DOX) and methotrexate (MTX), via the formation of pH-responsive imine linkage and hydrogen bonds, respectively. The drug-conjugated block copolymers are assembled into spherical micelles of < 200 nm, and the preferential release of DOX and MTX in response to acidic pH and redox conditions is shown. At pH 5, DOX release was 59.5%, and MTX release was 40% compared to 13% and 12% at pH 7.4, whereas at pH 5 with 10 mM GSH, a DOX release of 81.5% was observed after 48 h. Cellular uptake of drug-conjugated micelles and their apoptosis compared to free DOX in the MDA-MB-231 breast cancer cells is demonstrated. Caveolae-mediated endocytosis was found to be the major pathway used by drug-loaded nanocarriers.

10abiodegradable10acopolymers10aDOX-conjugate10adrug delivery systems10amethotrexate10amicelles10apH-responsive10aredox-responsive1 aAvhad, Shankarrao, V.1 aSurapaneni, Sai, Geetika1 aPurohit, Poorvi, M.1 aAmbade, Ashootosh, V. uhttps://library.ncl.res.in/content/redox-and-ph-responsive-block-copolymer-nanocarriers-dual-drug-conjugation-through-dynamic