Modifier poly ether

Jansen, J. C., Macchione, M., and Drioli, E. (2005), High flux asymmetric gas separation membranes of modified poly(ether ether ketone) prepared by the dry phase inversion technique, /. Membr. Sci., 255,167-180. 

J. Pieracci, J. V. Crivello, and G. Belfort. Increasing membrane permeability of UV-modified poly(ether sulfone) ultrafiltration membranes. J. Membr. ScL, 202(1-2) 1-16, June 2002. 

Shao, P. 2003. Pervaporation dehydration membranes based on chemically modified poly(ether ether ketone). Ph.D. Thesis, University of Waterloo. 

Gas Separation Properties of Modified Poly(ether ketone[sulfone]) with Phthalic Side Group... 

Scanning electron microscopy images of freeze fractured hollow fiber membranes produced by dry-jet wet spinning from PEEKWC, a modified poly(ether ether ketone), were used to make pore size measurements as a function of different spinning conditions... 

Membranes for UF can be prepared through the PI process using polymers such as PVDF, PSU, PES, CA, but also polyacrylonittile (PAN) and modified poly(ether ether ketone) [11,38]. The main difference with MF is the need for asymmetric membranes, with thin selective skin and support layer with reduced resistance. The main targets for preparing optimized membranes for UF are obtaining a sharp cut-off, improved mechanical and chemical resistances, and reduced susceptibility to fouling. 

F. Tasselli, J.C. Jansen, F. Sidari, and E. Drioli, Morphology and transport property control of modified poly(ether ether ketone) (PEEKWC) hollow fiber membranes prepared from PEEKWC/PVP blends Influence of the relative humidity in the air gap. Journal of Membrane Science 255 (2005) 13-22. 

PAs have also been copolymerized with other polymer systems and, in particular", with polyesters and poly ethers. In the copoly esteramides the crystallinity is decreased by copolymerization, as the crystalline structure of the amide unit is very different from the ester unit. However, alternating polyesteramides behave as homopolymers with a glass ttansition temperature and a melting temperature intermediate to the polyester and the PA polymer (Figs. 3.10 and 3.11).23,24 Polyesters, such as PBT and PET, modified with a small amount of diamide are also copolymers that have a high order.24,73... 

For the hydrogenation ofpolystyrene-fo-polybutadiene-fo-polystyrene (SBS) block co-polymer with Ru-TPPTS complex as catalyst, Jang et al. [92] applied a poly-ether-modified ammonium salt ionic liquid/organic biphasic system (Fig. 41.3). 

The most common way to modify aromatic polymers for application as a PEM is to employ electrophilic aromatic sulfonation. Aromatic polymers are easily sulfonated using concentrated sulfuric acid, fuming sulfuric acid, chlorosulfonic acid, or sulfur trioxide (or complexs thereof). Postmodification reactions are usually restricted due to their lack of precise control over the degree and location of functionalization, the possibility of side reactions, or degradation of the polymer backbone. Regardless, this area of PEM synthesis has received much attention and may be the source of emerging products such as sulfonated Victrex poly (ether ether ketone). 

With somewhat the same idea, Minoura [44] used the formation of a crown ether sandwich complex with K+ to force the association of helical dimers of C-terminal modified poly-benzylglutamate (52). Although no structural data were provided, he observed by viscosimetry the reversible formation of a K+ sandwich complex with two 15-crown-5 modified peptides. 

MC MDI MEKP MF MMA MPEG MPF NBR NDI NR OPET OPP OSA PA PAEK PAI PAN PB PBAN PBI PBN PBS PBT PC PCD PCT PCTFE PE PEC PEG PEI PEK PEN PES PET PF PFA PI PIBI PMDI PMMA PMP PO PP PPA PPC PPO PPS PPSU Methyl cellulose Methylene diphenylene diisocyanate Methyl ethyl ketone peroxide Melamine formaldehyde Methyl methacrylate Polyethylene glycol monomethyl ether Melamine-phenol-formaldehyde Nitrile butyl rubber Naphthalene diisocyanate Natural rubber Oriented polyethylene terephthalate Oriented polypropylene Olefin-modified styrene-acrylonitrile Polyamide Poly(aryl ether-ketone) Poly(amide-imide) Polyacrylonitrile Polybutylene Poly(butadiene-acrylonitrile) Polybenzimidazole Polybutylene naphthalate Poly(butadiene-styrene) Poly(butylene terephthalate) Polycarbonate Polycarbodiimide Poly(cyclohexylene-dimethylene terephthalate) Polychlorotrifluoroethylene Polyethylene Chlorinated polyethylene Poly(ethylene glycol) Poly(ether-imide) Poly(ether-ketone) Polyethylene naphthalate Polyether sulfone Polyethylene terephthalate Phenol-formaldehyde copolymer Perfluoroalkoxy resin Polyimide Poly(isobutylene), Butyl rubber Polymeric methylene diphenylene diisocyanate Poly(methyl methacrylate) Poly(methylpentene) Polyolefins Polypropylene Polyphthalamide Chlorinated polypropylene Poly(phenylene oxide) Poly(phenylene sulfide) Poly(phenylene sulfone)... 

Different TPs have been used to modify thermosets, such as poly(ether sulfone) (PES), polysulfone (PSF), poly(ether ketone) (PEK), polyether imide (PEI), poly(phenylene oxide) (PPO), linear polyimides, polyhydan-toin, etc. (Stenzenberger et al., 1988 Pascal et al., 1990, 1995 Pascault and Williams, 2000). 

Figure 18.18 Map of dielectric properties of engineering plastics. Among engineering plastics, SPS (impact modified and GF-reinforced HB and IR grades) has very low dielectric dissipation factor and dielectric constant following those of fluorocarbon polymers. PSF, polysulfone PPE, poly(phenylene ether) PES, poly(ether sulfone) PAr, polyarylate...

Membranes containing azobenzene-modified crown ether and crown ether linked spirobenzopyran also showed changes in the photostimulated membrane potential [55]. 2,3-Diphenylindenone oxide was also effective in changing the membrane potential of poly(vinyl chloride) by photoirradiation [56]. 

A research program to have benzylic ether-type resin react with polyisocyanate for producing polyurethane or urethane-modified poly-isocyanurate foam is being promoted. A foam which has intermediate properties between phenolic foam and polyurethane foam can be produced. 

The properties of silicones can be modified by combination with organic polymers. Block copolymers of poly(organo-siloxanes) and poly(ethers) as well as thermoplastic-modified silicones are industrially important, in addition to silicone combination resins. 

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