27.05.2013 | Leesa M. Smith, Michelle L. Coote, Journal of Polymer Science Part A: Polymer Chemistry, 2013

ABSTRACT The effect of temperature and solvent on polymer tacticity in free‐radical polymerization of styrene and methyl methacrylate was studied by 13C and 1H NMR, respectively. Polystyrene shows a mild syndiotactic tendency (Pm = 0.36 ± 0.02) that is independent of temperature over a ...

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27.05.2013 | Xiang Dong Liu, Chun Hua Zhao, Atsushi Sudo, Takeshi Endo, Journal of Polymer Science Part A: Polymer Chemistry, 2013

ABSTRACT The reaction between carbonyldiimidazole (CDI) and copper (II) nitrate produces a new Cu (II) complex with nitrate as the counter anion. TGA, UV, and FTIR analyses confirmed that the coordination number of CDI in this complex is two. The acceleration effect of the complex in ...

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22.05.2013 | Jonathan Johannes Wurth, Venkatram Prasad Shastri, Journal of Polymer Science Part A: Polymer Chemistry, 2013

ABSTRACT Polyesters constitute an important class of materials for in vivo biomedical applications. Poly(ɛ‐caprolactone) (PCL) is a hydrophobic biodegradable polyester which is employed to a lesser extent in drug delivery applications due to its rather limited range of physicochemical ...

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22.05.2013 | Adem Zengin, Ugur Tamer, Tuncer Caykara, Journal of Polymer Science Part A: Polymer Chemistry, 2013

ABSTRACT A reversible addition‐fragmentation chain transfer (RAFT) agent was directly anchored onto superparamagnetic Fe3O4 nanoparticles (SPNPs) in a simple procedure using a ligand exchange reaction of 2‐[(dodecylsulfanylcarbonylthiolsulfanyl) propionic acid] (DCPA) with oleic acid ...

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22.05.2013 | John Texter, Zhiming Qiu, Rene Crombez, Weidian Shen, Journal of Polymer Science Part A: Polymer Chemistry, 2013

ABSTRACT Solvent‐free nanofluids with surface functional groups composed of tetraalkylammonium ionic liquid organic salts and isothiocyanate decorating nanosilica cores are reported that exhibit viscous flow and glass transitions. These nanofluids when combined with hexamethylene ...

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22.05.2013 | Nabendu B. Pramanik, Dibyendu S. Bag, Sarfaraz Alam, Golok B. Nando, Nikhil K. Singha, Journal of Polymer Science Part A: Polymer Chemistry, 2013

ABSTRACT This investigation reports the preparation and characterization of thermally amendable functional polymer bearing furfuryl functionality via reversible‐addition fragmentation and chain transfer (RAFT) polymerization and Diels‐Alder (DA) reaction. In this case, furfuryl ...

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22.05.2013 | Stefanie Zuber, Katharina Landfester, Daniel Crespy, Ana‐Maria Popa, Journal of Polymer Science Part A: Polymer Chemistry, 2013

ABSTRACT Poly(N‐vinylcaprolactam) (PVCL) and poly(oligo(ethylene glycol) methyl ether methacrylate) (POEGMA) are well known for their thermoresponsive behavior in aqueous solutions. Indeed, they display lower critical solution temperatures (LCST) in the physiological range, which makes ...

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17.05.2013 | Vincent Besse, Gabriel Foyer, Rémi Auvergne, Sylvain Caillol, Bernard Boutevin, Journal of Polymer Science Part A: Polymer Chemistry, 2013

ABSTRACT This article describes the synthesis of new cyclic compounds able to react with amines to get nonisocyanate polyurethanes (NIPUs). The contribution of the most studied five‐membered cyclic carbonate was compared to five‐membered cyclic dithiocarbonate analogous and to a ...

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17.05.2013 | Yanfei Hu, Vincent Darcos, Sophie Monge, Suming Li, Journal of Polymer Science Part A: Polymer Chemistry, 2013

ABSTRACT Novel thermo‐responsive poly(N‐isopropylacrylamide)‐block‐poly(l‐lactide)‐block‐poly(N‐isopropylacylamide) (PNIPAAm‐b‐PLLA‐b‐PNIPAAm) triblock copolymers were successfully prepared by atom transfer radical polymerization of NIPAAm with Br‐PLLA‐Br macroinitiator, using a ...

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03.05.2013 | Yunmei Bi, Caixian Yan, Lidong Shao, Yufei Wang, Yongcui Ma, Gang Tang, Journal of Polymer Science Part A: Polymer Chemistry, 2013

ABSTRACT The first‐ and second‐generation well‐defined thermoresponsive amphiphilic linear–dendritic diblock copolymers based on hydrophilic linear poly(N‐vinylcaprolactam) and hydrophobic dendritic aromatic polyamide have been synthesized via reversible addition fragmentation chain ...

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