نتایج جستجو برای: nipam polymer

تعداد نتایج: 93135  

Journal: :Journal of the American Chemical Society 2002
Gary P Harp Keshav S Gautam Ali Dhinojwala

Infrared-visible sum frequency generation spectroscopy (SFG) has been used to study the interface between poly(vinyl-N-octadecylcarbamate-co-vinyl acetate) (Comb) and deuterated or hydrogenated polystyrene (dPS or hPS) films. Strong methyl symmetric and Fermi resonance bands associated with the alkyl side chains of the Comb polymer are observed in the SFG spectra. In addition, for Comb/hPS spec...

Journal: :علوم و تکنولوژی پلیمر 0
علیرضا نصیری تهران، پژوهشگاه صنعت نفت مجید ولی زاده تهران، پژوهشگاه صنعت نفت

fluid properties with constant improvement in efficiency have been noticeable as important criteria in drilling operation. the main drilling fluid properties highly depend on utilization of new polymers with high efficiency in drilling fluid composition. in this paper, the performance of a new polymer, called partially hydrolyzed polyacrylamide polymer (phpa), is studied which has recently ente...

Journal: :iranian journal of science and technology (sciences) 2015
e. bagherzadeh-khajeh marjan

in this paper, absorption spectra of both solution and films of cyano azobenzene polymer are investigated. the analysis of overlapped absorption spectra of polymer, related to trans and cis isomers, shows that the population of cis isomers is higher than trans isomers. it means that, cyano azobenzene molecules have a folded structure in polymer, in thermal equilibrium. presence of cyano molecul...

Journal: :Macromolecular Materials and Engineering 2022

This study describes thermo-rheological properties of branched copolymer surfactants (BCSs) stabilizing oil-in-water emulsions to generate materials exhibiting temperature-dependent gelation with the ability solubilize a broad range molecules. Four poly(N-isopropylacrylamide-ran-poly(ethylene glycol) methacrylate) (poly(NIPAM-ran-PEGMA)) BCSs varying molecular weight (Mn), 4.7; 7.0; 7.8 and 9.0...

2013
Elena V. Batrakova Tatiana K. Bronich Joseph A. Vetro Alexander V. Kabanov

5.

Journal: :international journal of nano dimension 0
j. roul university department of pharmaceutical sciences, utkal university, bhubaneswar, odisha, india. s. k. sahoo university department of pharmaceutical sciences, utkal university, bhubaneswar, odisha, india. r. mohapatra university department of pharmaceutical sciences, utkal university, bhubaneswar, odisha, india.

this paper discusses about preparation of biodegradable polymer /clay nanocomposites based on organically modified montmorillonite clay; i.e. cloisite 10a and biodegradable polymer chitosan by solution mixing technique and their characterization. the nanocomposites were successfully prepared and their structures were characterized by powder x-ray diffraction (xrd), particle size analyzer (beckm...

2004
D. R. Paul

Abstracf The successful development of multicomponent polymer systems generally requires careful control of polymer-polymer interactions since this is important for achieving useful mechanical properties, optically clear mixtures (miscibility), coupling of impact modifiers to a bnttle matrix, compatibilization of immiscible polymers, etc. Random copolymers offer a powerful tool for achieving th...

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