@article { ISI:000319275700021, title = {Copolymerization of ethylene with unsaturated alcohols and methylmethacrylate using a silylated alpha-diimine nickel catalyst: molecular modeling and photodegradation studies}, journal = {Journal of Applied Polymer Science}, volume = {129}, number = {4}, year = {2013}, month = {AUG}, pages = {1820-1832}, publisher = {WILEY-BLACKWELL}, address = {111 RIVER ST, HOBOKEN 07030-5774, NJ USA}, abstract = {

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.

}, keywords = {ageing, copolymers, Degradation, grafting}, issn = {0021-8995}, doi = {10.1002/app.38889}, author = {Matos, Ines and Fernandes, Susete N. and Liu, Hua-Rong and Tevtia, Amit K. and Singh, R. P. and Manda, Lemos and Lemos, Francisco and Marques, Maria M.} } @article { ISI:000362736300014, title = {Selective solid-phase extraction of metal for water decontamination}, journal = {Journal of Applied Polymer Science}, volume = {133}, number = {1}, year = {2016}, month = {JAN}, pages = {42849}, publisher = {WILEY-BLACKWELL}, address = {111 RIVER ST, HOBOKEN 07030-5774, NJ USA}, abstract = {

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.

}, keywords = {Adsorption, copolymers, crosslinking, kinetics, radical polymerization}, issn = {0021-8995}, doi = {10.1002/app.42849}, author = {Mane, Sachin and Ponrathnam, Surendra and Chavan, Nayaku} } @article { ISI:000367915800019, title = {Synthesis 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 architecture}, journal = {Journal of Applied Polymer Science}, volume = {133}, number = {14}, year = {2016}, month = {APR}, publisher = {WILEY-BLACKWELL}, address = {111 RIVER ST, HOBOKEN 07030-5774, NJ USA}, abstract = {

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{\textquoteright}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{\textquoteright}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.

}, keywords = {biodegradable, copolymers, differential scanning calorimetry, mechanical properties, ring-opening polymerization}, issn = {0021-8995}, doi = {10.1002/app.43267}, author = {Deokar, Megha D. and Idage, Susheela B. and Idage, Bhaskar B. and Sivaram, Swaminathan} } @article {45475, title = {Flocculation of kaolin from aqueous suspension using low dosages of acrylamide-based cationic flocculants}, journal = {Journal of Applied Polymer Science}, volume = {136}, year = {2019}, month = {APR}, pages = {Article Number: 47286}, type = {Article}, abstract = {

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.

}, keywords = {copolymers, hydrophilic polymers, polyelectrolytes}, issn = {0021-8995}, doi = {10.1002/app.47286}, author = {Suresha, P. R. and Badiger, Manohar V.} } @article {49380, title = {Biocompatible PVAc-g--PLLA acrylate polymers for DLP 3D printing with tunable mechanical properties}, journal = {ACS APPLIED MATERIALS \& INTERFACES}, volume = {16}, year = {2024}, month = {OCT }, pages = {62594-62605}, type = {Journal Article}, keywords = {acid, copolymers, polymerization, TACONIC ANHYDRIDE}, issn = {1944-8244}, doi = {10.1021/acsami.4c11285}, author = {Pal, Shibam and Gavhane, Utreshwar Arjun and Asha, S. K.} }