Zobrazeno 1 - 10
of 26
pro vyhledávání: '"Young K. Jhon"'
Publikováno v:
ACS macro letters. 1(9)
We report on establishing the polydispersity in chemical composition (PCC) and polydispersity in monomer sequence distribution (PMSD) in random copolymers of poly(styrene-co-4-bromostyrene) (PBrxS), where x = (0.385 ± 0.035) is the mole fraction of
Publikováno v:
Polymer. 53:1131-1137
We examined the onset of the cloud point in dilute aqueous solutions of gradient copolymers of 2-hydroxyethyl methacrylate and dimethylaminoethyl methacrylate. Dynamic Light Scattering (DLS) and transmittance measurements both indicate that the copol
Publikováno v:
Journal of Polymer Science Part B: Polymer Physics. 49:629-637
Gradient copolymers of 2-hydroxyethyl methacrylate (HEMA) and 2-(dimethylamino)ethyl methacrylate (DMAEMA) having prescribed linear, parabolic, and hyperbolic composition profiles were synthesized with the guidance of a numerical model that determine
Publikováno v:
Macromolecular Rapid Communications. 30:1543-1548
Interaction chromatography has been employed to validate that adsorption of poly[styrene-co-(4-bromostyrene)] (PBr(x) S) random copolymers, where x denotes the mole fraction of 4-bromostyrene (4-BrS) in PBr(x) S in solution depends on the average num
Autor:
Jan Genzer, Martin S. Beevers, Pavel G. Khalatur, Young K. Jhon, Alexei R. Khokhlov, James J. Semler, Olga Guskova
Publikováno v:
Macromolecules. 42:2843-2853
We study the effect of comonomer sequence distributions in random copolymers (RCPs) on RCP adsorption on flat impenetrable surfaces. RCP poly(styrene-co-4-bromostyrene) (PBrxS), where x denotes the mole fraction of 4-bromostryrene (4-BrS), is prepare
Publikováno v:
Macromolecules. 41:6719-6727
We report on the kinetics of the bromination of free polystyrene (PS) chains in bulk solution and those anchored on flat solid substrates by performing the bromination reaction in different solvents, including nitrobenzene (NB), 1-chlorodecane (CD),
Autor:
James J. Semler, Martin S. Beevers, Alan E. Tonelli, Ramanan Krishnamoorti, Jan Genzer, Young K. Jhon
Publikováno v:
Advanced Materials. 19:2877-2883
Inthis report, we present a simple methodology facilitating theformation of A-B random copolymers with tunable sequencedistributions. We demonstrate that varying the degree ofblockiness in the sequence distribution of A and B monomershas a profound i
Publikováno v:
Macromolecular Rapid Communications. 27:697-701
Young K. Jhon, Rajendra R. Bhat, Changwoo Jeong, Orlando J. Rojas, Igal Szleifer, Jan Genzer* 1 Department of Chemical & Biomolecular Engineering, North Carolina State University, Raleigh, North Carolina 27695-7905, USA Fax: 919-515-3465 or 1-435-304
Publikováno v:
Colloids and Surfaces A: Physicochemical and Engineering Aspects. 196:135-143
Water-based polyurethane dispersions (PUD) were prepared by polyaddition reaction using poly (hexamethylene adipate) glycol (polyol 66), isophorone diisocyanate (IPDI), dimethylol propionic acid (DMPA), and 1,6-hexane diamine (HDA) as chain extender.
Publikováno v:
Colloids and Surfaces A: Physicochemical and Engineering Aspects. 179:71-78
In the several decades, aqueous polyurethane dispersion has been investigated by many researchers. However, relatively little systematic work has been reported in detail on chain extension process. This work describes the reaction of chain extension