Results 131 to 140 of about 752 (186)

Preparation of sulfonated polysulfone/polysulfone and aminated polysulfone/polysulfone blend membranes

Journal of Applied Polymer Science, 1996
Sulfonation and amination of polysulfone (PSf) were performed in this study to improve the hydrophilicity of PSf membranes. The sulfonated polysulfone (SPSf) and aminated polysulfone (APSf) membranes with a higher degree of reaction exhibited a higher water flux and worse mechanical strength than that of the original PSf membranes.
Ming-Huang Chen, Tze-Chiang Chiao, Tsai-Wie Tseng   +2 more
openaire   +1 more source

Performance of polysulfone/carboxylated polysulfone membranes

Polymer International, 1994
AbstractMembranes were made from miscible blends of polysulfone (PSf) and carboxylated polysulfone (CPSf) having an average of 0.45 and 0.87 COOH groups per repeated unit. Membranes made from PSf and CPSf alone showed low separation for NaCl, glucose, polyethylene glycol (PEG) of various molecular weights and bovine albumin, from aqueous solutions ...
Lau, Wayne W.Y., Jiang, Youqing
openaire   +1 more source

Polysulfone corneal lenses

Journal of Cataract and Refractive Surgery, 1986
Polysulfone is a thermoplastic compound first synthesized in 1965. A unique characteristic of polysulfone is its high refractive index (1.633), which allows very thin optical lenses to be manufactured. Over the last five years, D. Peter Choyce has surgically implanted over 40 polysulfone lenses into eyes of his patients.
S L, Lane, R L, Lindstrom, J D, Cameron, R H, Thomas, E A, Mindrup, G O, Waring, B E, McCarey, P S, Binder   +7 more
openaire   +2 more sources

Miscibility and enthalpy relaxations in polysulfone—Carboxylated polysulfone blends

Polymer International, 1993
AbstractPhase behavior in polysulfone‐carboxylated polysulfone (PSf‐CPSf) blends was studied by glass transition observations in conjunction with enthalpy relaxation technique. Miscibility in all proportions was detected in blends where CPSf has a degree of carboxylation (DC, i.e. number of carboxyl groups per repeat unit) less than about 1.3.
Lau, Wayne W.Y., Jiang, Y.Q., Tan, Pedro P.K.   +2 more
openaire   +1 more source

The rheology of polysulfone

Polymer Engineering & Science, 1978
Abstract The viscosity‐shear rate functions for polysulfone (PSF) condensates ranging from 0.4RV to 0.95RV were determined using capillary rheometry, The most probable distribution of molecular weights of these resins allowed facile comparison with the polydisperse Bueche theory for viscosity, The agreement in ...
M. T. Shaw, J. C. Miller
openaire   +1 more source

Bisphenol-A Polysulfone

2009
Abstract Major Applications Medical and household appliances that are sterilizable by hot air and steam such as corrosion-resistant piping and injection molded engineering parts. Also used in electric and electronic applications and as membranes for reverse gas streams and gas separation.
Sizhu Wu, Tarek M Madkour
openaire   +1 more source

Fluorination of polysulfone

Journal of Fluorine Chemistry, 1992
Abstract Fluorination of aromatic polysulfone film was achieved by treatment with XeF2 vapors. Swelling tests in certain industrial liquids and fuels showed substantial decrease in swelling of the fluorinated films. The influence of a catalyst on the fluorination process was examined.
G.B. Barsamyan, V.B. Sokolov, S.N. Spirin, B.B. Chaivanov, N.A. Vargasova, V.P. Zubov   +5 more
openaire   +1 more source

Modified Polysulfones. I. Synthesis and Characterization of Polysulfones with Unsaturated end Groups

Journal of Macromolecular Science, Part A, 1994
Abstract Chloro-terminated polysulfones with various molecular weights were modified with poly(ethylene oxide) and poly[(ethylene oxide)-(propylene oxide)] macromers carrying α-hydroxyl and ω-allyl end groups via classical polycondensation reactions.
E. Butuc, V. Cozan, D. Giurgiu, I. Mihalache, Yushan Ni, Mengxian Ding   +5 more
openaire   +1 more source

Crystallization in Polyamide 6/Polysulfone Blends:  Effect of Polysulfone Particle Size

Macromolecules, 1998
By reactive blending of polyamide 6 (PA) with polysulfone (PSU) using a gram-scale mixer (Mini-Max Molder), we prepared a series of PA/PSU (80/20 wt.ratio) with various diameters of PSU particles: 90 nm by using phthalic anhydride-terminated PSU (PSU-PhAH), 0.2 µm by carboxylic acid-grafted PSU (PSU-COOH), and 1.0 µm by nonreactive PSU (nf-PSU ...
, Charoensirisomboon, , Saito, , Inoue, , Weber, , Koch   +4 more
openaire   +2 more sources

Chemical modification of polysulfone: anionic synthesis of dipyridyl functionalized polysulfone

Polymer, 2001
Abstract A new method for the synthesis of dipyridyl functionalized polysulfone is described. The functionalization process involves the formation of lithiated polysulfone from polysulfone ( 1 ) and subsequent reaction with 2,2′-vinylidenedipyridine ( 2 ) in tetrahydrofuran at −78°C under argon atmosphere. The dipyridyl functionalized polysulfone ( 3
G.J Summers, M.P Ndawuni, C.A Summers
openaire   +1 more source