Bibliothek

X
feed icon rss

Ihre E-Mail wurde erfolgreich gesendet. Bitte prüfen Sie Ihren Maileingang.

Leider ist ein Fehler beim E-Mail-Versand aufgetreten. Bitte versuchen Sie es erneut.

Vorgang fortführen?

Exportieren
Filter
  • Chemistry  (66)
Datenquelle
Materialart
Erscheinungszeitraum
Schlagwörter
  • 1
    Digitale Medien
    Digitale Medien
    Synthesis of silicone graft polymers and a study of their surface active properties (1984)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 185 (1984), S. 9-18 
    Details
    ISSN: 0025-116X
    Schlagwort(e): Chemistry ; Polymer and Materials Science
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie , Physik
    Notizen: Silicone macromers 5, having a methacryloyl group at one end, and controiled molecular weights, were prepared by anionic polymerization of hexamethylcyclotrisiloxane (2) and subsequent termination with chlorosilane compounds containing a polymerizable vinyl groups. Graft polymers with siloxane grafts were prepared by copolymerization of these macromers with methyl methacrylate (MMA) or styrene. The surface active properties of MMA-based graft polymers were investigated by studying the extent of surface modification of films of graft polymer-poly(methyl methacrylate) blends.
    Zusätzliches Material: 4 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/macp.1984.021850102
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    Artikel (Nationallizenzen)
    Volltext
  • 2
    Digitale Medien
    Digitale Medien
    Block copolymerization, 9Part 8: cf.2.. Polymerization of the NCA of methyl D-glutamate by telechelic polystyrene having glycyl groups as active chain ends (1975)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 176 (1975), S. 1207-1216 
    Details
    ISSN: 0025-116X
    Schlagwort(e): Chemistry ; Polymer and Materials Science
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie , Physik
    Beschreibung / Inhaltsverzeichnis: Telecheles Polystyrol mit Glycylamino-Gruppen als aktive Kettenenden wurde dargestellt und als Initiator zur Polymerisation des NCA von D-Glutaminsäure-methylester [4-(2-Methoxycarbonyl)äthyl-1,3-oxazolidin-2,5-dion] (1) verwendet. Mit Propionitril oder besser mit äthylacetat als Lösungsmittel verlief die stufenweise Polymerisation von NCA 1 mit genügend hoher Initiatorausbeute und führte zu Blockpolymeren des Typs ABA, die sich aus Polystyrol und Polypeptid-Segmenten zusammensetzen.
    Notizen: Telechelic polystyrene with glycylamino groups as active chain ends was prepared and used as initiator for the polymerization of the NCA of methyl D-glutamate [4-(2-methoxycarbonyl)ethyl-1,3-oxazolidin-2,5-dione] (1). Using propionitrile or preferably ethyl acetate as solvent, the stepwise polymerization of the NCA 1 proceeded with a sufficiently high initiator efficiency, giving ABA-type block copolymers consisting of polystyrene and polypeptide segments.
    Zusätzliches Material: 2 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/macp.1975.021760502
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    Artikel (Nationallizenzen)
    Volltext
  • 3
    Digitale Medien
    Digitale Medien
    Synthesis of segmented copolyamides by using telechelic prepolymers (1984)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 185 (1984), S. 2077-2087 
    Details
    ISSN: 0025-116X
    Schlagwort(e): Chemistry ; Polymer and Materials Science
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie , Physik
    Notizen: Polyamide-polystyrene and polyamide-poly(oxyethylene) segmented copolymers 6a, b of well-defined structure and composition were synthesized using telechelic prepolymers. α,ω-Dicarboxyl-terminated polystyrene 2 was prepared by radical polymerization of styrene initiated by 4,4′-azobis(4-cyanovaleric acid) (1). α,ω-Dicarboxyl-terminated poly(oxyethylene) 3 was prepared by the reaction of commercially available hydroxyl-terminated poly(oxyethylene) with excess succinic anhydride. These telechelic prepolymers were condensed with hexamethylenediamine in a 1:1 mole ratio together with nylon-6,6 salt using the triphenyl phosphite/pyridine system. Similarly, α,ω-diamino-terminated polystyrene 5 was prepared and condensed with adipic acid and nylon-6,6 salt. The segmented copolymers 6a and 6b were characterized by their 1H NMR and IR spectra.
    Zusätzliches Material: 4 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/macp.1984.021851003
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    Artikel (Nationallizenzen)
    Volltext
  • 4
    Digitale Medien
    Digitale Medien
    Synthesis and characterization of hydrogels from graft copolymers (1985)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 12 (1985), S. 51-60 
    Details
    ISSN: 0025-116X
    Schlagwort(e): Chemistry ; Polymer and Materials Science
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie , Physik
    Notizen: Well-defined graft copolymers composed of a hydrophilic clyceryl methacrylate backbone and hydrophobic monodisperse molecular weight polystyrene branches were prepared by the macromonomer technique. The swelling behaviour and the oxygen permeability of hydrogels prepared from these graft copolymers were studied. It was found that equilibrium water content of these hydrogels was considerably high and depended on both the graft copolymer structure and the microphase separated structure of the prepared hydrogel. Oxygen permeability of the hydrogels was directly related to their water content. Hydrogel membranes prepared from the graft copolymers have also well-defined structures which can be easily controlled by the graft copolymer structure.
    Zusätzliches Material: 7 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/macp.1985.020121985107
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    Artikel (Nationallizenzen)
    Volltext
  • 5
    Digitale Medien
    Digitale Medien
    Cationic polymerization of cyclic thioacetals by triethyloxonium tetrafluoroborate (1979)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 180 (1979), S. 2279-2287 
    Details
    ISSN: 0025-116X
    Schlagwort(e): Chemistry ; Polymer and Materials Science
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie , Physik
    Notizen: Polymerization of 1-oxa-3-thiacyclopentane with catalytic amounts of triethyloxonium tetrafluoroborate was studied. The initiation reaction was a fast and quantitative formation of ethylsulfonium salt of monomer. The propagation reaction was a slow and quite complex reaction with sulfonium transfer reactions. The reaction mechanism is discussed.
    Zusätzliches Material: 5 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/macp.1979.021801001
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    Artikel (Nationallizenzen)
    Volltext
  • 6
    Digitale Medien
    Digitale Medien
    Synthesis of polysiloxane graft copolymers by hydrosilylation reactionsDedicated to Prof. J. E. McGrath on the occasion of his 50th birthday (1985)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 186 (1985), S. 1203-1211 
    Details
    ISSN: 0025-116X
    Schlagwort(e): Chemistry ; Polymer and Materials Science
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie , Physik
    Notizen: Polysiloxane-poly(methyl methacrylate) and polysiloxane-polystyrene graft copolymers of well-defined structure and composition were synthesized by hydrosilylation. Polysiloxanes with Si—H bonds were prepared by equilibrium ring-opening polymerization of cyclic siloxane oligomers catalyzed by trifluoroacetic acid. Molecular weight and Si—H group content were controlled by the feed ratio. Allyl-terminated poly(methyl methacrylate) and polystyrene were prepared by the reaction of carboxyl-terminated prepolymers with allyl glycidyl ether. The hydrosilylation reactions of Si—H containing polysiloxanes with these allyl-terminated polymers produced tailor-made graft copolymers, which were characterized by their 1H NMR and IR spectra.
    Zusätzliches Material: 2 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/macp.1985.021860609
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    Artikel (Nationallizenzen)
    Volltext
  • 7
    Digitale Medien
    Digitale Medien
    Water-soluble graft copolymers from macromonomer method (1989)
    Bognor Regis [u.a.] : Wiley-Blackwell
    Journal of Polymer Science Part A: Polymer Chemistry 27 (1989), S. 1099-1114 
    Details
    ISSN: 0887-624X
    Schlagwort(e): Chemistry ; Polymer and Materials Science
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie
    Notizen: Water-soluble graft copolymers of well-defined structure having hydrophobic polymethacrylate branches with different ester groups were prepared by the macromonomer method. Methacrylate macromonomers of controlled molecular weights having a methacryloyloxyl end group were synthesized by radical polymerization of the corresponding monomer in the presence of thioglycolic acid followed by the reaction of glycidyl methacrylate with the terminal carboxyl group. These macromonomers were copolymerized with methacrylic acid and methyl methacrylate to prepare tailor-made graft copolymers composed of a hydrophlic backbone and different kinds of hydrophobic branches, which were characterized by elemental analysis, NMR, and GPC. The viscosities of the aqueous solutions of the sodium salts of these graft copolymers were measured. It was found that the viscosity of the dilute solution of the graft copolymer was remarkably high compared with the corresponding random copolymer irrespective of the ester group in branch segments. Solubilizing behavior of Orange-OT in aqueous solutions of the graft copolymers and the random copolymer were also investigated to study the nature of the hydrophobic domain of the graft copolymers.
    Zusätzliches Material: 10 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/pola.1989.080270401
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    Artikel (Nationallizenzen)
    Volltext
  • 8
    Digitale Medien
    Digitale Medien
    Synthesis of crown ether-terminated poly(methyl methacrylate) by radical chain transfer polymerization (1990)
    Bognor Regis [u.a.] : Wiley-Blackwell
    Journal of Polymer Science Part A: Polymer Chemistry 28 (1990), S. 59-65 
    Details
    ISSN: 0887-624X
    Schlagwort(e): Chemistry ; Polymer and Materials Science
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie
    Notizen: Mercapto-16-crown-5 was prepared starting from tetraethyleneglycol and 3-chloro-2-chloromethyl-1-propene. Radical polymerization of methyl methacrylate was carried out in the presence of mercapto-16-crown-5 as a chain transfer agent to give crown ether-terminated poly(methyl methacrylate). The end crown group was characterized by IR and 1H-NMR spectra. Sodium cation was selectively extracted by this crown-containing polymer. The molecular weight of the obtained polymer had influence upon the ability of extraction of sodium cation.
    Zusätzliches Material: 2 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/pola.1990.080280104
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    Artikel (Nationallizenzen)
    Volltext
  • 9
    Digitale Medien
    Digitale Medien
    Synthesis of aromatic dicarboxyl-terminated poly(methyl methacrylate) macromonomers (1989)
    Bognor Regis [u.a.] : Wiley-Blackwell
    Journal of Polymer Science Part A: Polymer Chemistry 27 (1989), S. 2007-2014 
    Details
    ISSN: 0887-624X
    Schlagwort(e): Chemistry ; Polymer and Materials Science
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie
    Notizen: Hydroxyl- or amino-terminated prepolymers were prepared by radical polymerization of methyl methacrylate in the presence of 2-mercaptoethanol or 2-aminoethanethiol hydrochloride, respectively, as a chain transfer agent. The resulting prepolymers were subjected to react with trimellitic anhydride to form aromatic dicarboxyl-terminated poly(methyl methacrylate)s. These condensation-type macromonomers and terephthalic acid were condensed with bisphenol-A to produce polyester-poly(methyl methacrylate) graft copolymers.
    Zusätzliches Material: 5 Tab.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/pola.1989.080270621
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    Artikel (Nationallizenzen)
    Volltext
  • 10
    Digitale Medien
    Digitale Medien
    Polystyrenes with structurally different oligosiloxanes as p-substituents for oxygen permeable membrane materials (1987)
    Bognor Regis [u.a.] : Wiley-Blackwell
    Journal of Polymer Science Part A: Polymer Chemistry 25 (1987), S. 3191-3204 
    Details
    ISSN: 0887-624X
    Schlagwort(e): Chemistry ; Polymer and Materials Science
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie
    Notizen: Polystyrenes with structurally different oligosiloxanes as p-substituents were synthesized and the selective oxygen permeation through the polymer film was studied. It was found that the structure of the p-oligosiloxane substituents had great effects not only on the glass transition temperature of the polymer but also on the oxygen permeation behavior through the polymer film. Trimethylsiloxyl groups, especially, were shown to play an essential role in enhancing the permeability.
    Zusätzliches Material: 3 Tab.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/pola.1987.080251202
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    Artikel (Nationallizenzen)
    Volltext
Schließen ⊗
Diese Webseite nutzt Cookies und das Analyse-Tool Matomo. Weitere Informationen finden Sie hier...