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  • 1
    Electronic Resource
    Electronic Resource
    A nitrocellulose-modified UV-curable acrylated urethane prepolymer (1996)
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 236 (1996), S. 169-176 
    Details
    ISSN: 0003-3146
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Der Einfluß der Nitrocellulosekonzentration auf die mechanischen Eigenschaften von aus einem UV-härtbaren Acrylat-Urethan-Präpolymeren hergestellten Polymerfilmen wurde untersucht. Das Acrylat-Urethan-Präpolymere wurde aus Isophorondiisocyanat und Polypropylenglykolmonomethacrylat synthetisiert. Isobornylacrylat und N-Vinylpyrrolidinon wurden als reaktive Verdünnungsmittel sowohl zum Absenken der Viskosität des Präpolymeren als auch als Lösungsmittel für die Nitrocellulose eingesetzt. Eine Erhöhung des Nitrocellulosegehaltes bewirkte eine Zunahme der Zugfestigkeit und der Dehnbarkeit der Filme.
    Notes: The effects of varying nitrocellulose concentrations on mechanical properties of polymeric films prepared from UV-curable acrylated urethane prepolymer were investigated. The acrylated urethane prepolymer was synthesized from isophorone diisocyanate (IPDI) and poly(propylene glycol monomethacrylate) (PPGMMA). Isobornyl acrylate (IBoA) and N-vinyl pyrrolidinone (NVP) were used as reactive diluents with the purpose of reducing the viscosity of the prepolymer as well as acting as solvent for nitrocellulose. An increase in nitrocellulose content caused an increase both in tensile strength and elongation values of polymeric films.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/apmc.1996.052360113
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  • 2
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    Toughening of Epoxy Resins by Amine Terminated Poly(arylene ether ketone)s having Pendant Tertiary Butyl Groups (2006)
    Springer
    Details
    Publication Date: 2006-10-13
    Print ISSN: 0170-0839
    Electronic ISSN: 1436-2449
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Published by Springer
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  • 3
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    Preparation of novel UV-curable methacrylated urethane resins from a modified epoxy resin and isocyanatoethylmethacrylate (IEM) (2002)
    Springer
    Details
    Publication Date: 2002-01-01
    Print ISSN: 0170-0839
    Electronic ISSN: 1436-2449
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Published by Springer
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  • 4
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    The effect of mixed diluent on the porous structure of crosslinked PMMA beads (2000)
    Springer
    Details
    Publication Date: 2000-04-20
    Print ISSN: 0170-0839
    Electronic ISSN: 1436-2449
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Published by Springer
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  • 5
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    Perfectly alternating poly(arylene ether ketone sulfone)'s (2000)
    Springer
    Details
    Publication Date: 2000-03-23
    Print ISSN: 0170-0839
    Electronic ISSN: 1436-2449
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Published by Springer
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  • 6
    Electronic Resource
    Electronic Resource
    Perfectly alternating poly(arylene ether ketone sulfone)'s (2000)
    Springer
    Polymer bulletin 44 (2000), S. 143-150 
    Details
    ISSN: 1436-2449
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Summary In this study, the synthesis of perfectly alternating poly(arylene ether ketone sulfone)'s (PAEKS) via their soluble poly(arylene ether ketimine sulfone) (PAEKetS) intermediates was described. In the first stage of this procedure a new bishalide monomer, 1,1'-bis(4-fluoro(n-benzohydroxylidene aniline)) sulfone (FBHAS) was synthesized. In the second stage, the polymerization of this monomer with various aromatic bisphenols to form the amorphous PAEKetS's and then the hydrolysis of the ketimine groups on the PAEKetS's backbones to ketones in mild acidic conditions in order to obtain perfectly alternating PAEKS's was conducted.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002890050585
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  • 7
    Electronic Resource
    Electronic Resource
    Effect of diluents on the porous structure of crosslinked poly(methyl methacrylate) beads (1995)
    Springer
    Polymer bulletin 35 (1995), S. 511-516 
    Details
    ISSN: 1436-2449
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Summary Copolymer beads based on methyl methacrylate (MMA) and ethylene glycol dimethacrylate (EGDM) were prepared by suspension polymerization technique. Two different solvents, namely toluene and cyclohexane, were used as the diluents in the polymerization system. It was found that toluene produces pores of radii 2 to 10 nm corresponding to the interstices between the nuclei. In the case of cyclohexane as the diluent, formation of large pores with a broad size distribution from 10 to 1000 nm were observed. These sizes correspond to the spaces between the microspheres and the aggregates forming the copolymer beads. The results indicate that, as in porous styrene-divinylbenzene copolymers, the solvating power of the diluent present during the network formation is mainly responsible for the structural characteristics of porous MMA/EGDM copolymer beads.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00297619
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  • 8
    Electronic Resource
    Electronic Resource
    The effect of mixed diluent on the porous structure of crosslinked PMMA beads (2000)
    Springer
    Polymer bulletin 44 (2000), S. 325-330 
    Details
    ISSN: 1436-2449
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Summary In this work copolymer beads, based on MMA (methyl methacrylate) and EGDM (ethylene glycol dimethacrylate), were prepared by suspension polymerization. A mixed solvent, composed of two different solvents, namely toluene and cyclohexane, was used as the diluent in the polymerization medium. The porous structure of the beads was found to be affected by the solvent composition used to dissolve the monomers initially. It was observed that the porosity and pore size increased gradually with the increase of cyclohexane content of the solvent composition. It was also detected that the pore radii changed from 2–10 nm to 700–1000 nm as the cyclohexane content of the diluent changed from nil to 100 % (v/v) respectively. These results indicate that pore size of the copolymer beads is a function of solvent composition.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002890050609
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  • 9
    Electronic Resource
    Electronic Resource
    Effects of reactive diluents on mechanical and physical properties of a UV curable acrylated urethane prepolymer (1995)
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 230 (1995), S. 105-115 
    Details
    ISSN: 0003-3146
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: In dieser Studie wurde die Abhängigkeit der mechanischen Eigenschaften eines UV-härtbaren Acrylat-Urethan-Präpolymeren von reaktiven Verdünnungsmitteln und deren Menge untersucht. Durch stufenweise Additionsreaktion wurde das Acrylat-Urethan-Präpolymere aus Isophorondiisocyanat (IPDI), einem aliphatischen Diisocyanat und Polypropylenglykolmonomethacrylat (PPGMMA) synthetisiert. Die UV empfindlichen Mischungen, die N-Vinylpyrrolidinon (NVP), Thiodiethylenglykoldiacrylat (TDGDA) und Isobornylacrylat (IBoA) als reaktive Verdünnungsmittel enthalten, wurden mit UV-Licht bestrahlt. Sowohl für TDGDA als auch für IBoA als reaktive Verdünnungsmittel führte eine Erhöhung des Gehaltes zu einem Anstieg der Zugfestigkeit und einem Abfall der Dehnung. Im Gegensatz dazu wurde bei Verwendung von NVP als reaktives Verdünnungsmittel oberhalb einer bestimmten Konzentration ein Abfall der Zugfestigkeit beobachtet.Es wurde gefunde, daß der Umfang der Wasserabsorption der UV aushärtbaren Acrylat-Urethan-Filme vom Typ und der Menge des reaktiven Verdünnungsmittels abhängig ist. Die thermische Beständigkeit der Filme konnte durch Einarbeitung der reaktiven Verdünnungsmittel verbessert werden.
    Notes: In this study, the dependence of the mechanical properties of a UV curable acrylated urethane on reactive diluent types and their amounts was investigated. The acrylated urethane prepolymer was synthesized from isophorone diisocyanate (IPDI), an aliphatic diisocyanate, and polypropylene glycol monomethacrylate (PPGMMA) by stepwise addition reaction. UV sensitive mixtures containing N-vinylpyrrolidinone (NVP), thiodiethylene glycol diacrylate (TDGDA) and isobornyl acrylate (IBoA) as reactive diluents were irradiated by UV light. An increase in reactive diluent content, either TDGDA or IBoA, caused an increase in tensile strength and a decrease in elongation values. In contrast, above a certain concentration a decrease in tensil strength was observed when NVP was used as reactive diluent.The water absorption capacities of the UV curable acrylated urethane films were observed to depend on type and amount of reactive diluent that was used. Thermooxidative properties of the films were also improved by incorporation of reactive diluents into formulations.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/apmc.1995.052300107
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  • 10
    Electronic Resource
    Electronic Resource
    Novel poly(arylene ether ketone ketone)s synthesized by Friedel-Crafts acylation (1998)
    Weinheim : Wiley-Blackwell
    Macromolecular Chemistry and Physics 199 (1998), S. 1887-1893 
    Details
    ISSN: 1022-1352
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: A series of novel poly(arylene ether ketone ketone)s were prepared from two novel oligomers and three different diacid chlorides via Friedel-Crafts polymerization. The oligomers 2,6-bis(4-phenoxybenzoyl)naphthalene and 5-tert-butyl-1,3-bis(4-phenoxybenzoyl)benzene were synthesized by Friedel-Crafts acylation of diphenyl ether with 2,6-naphthalenedicarbonyl dichloride and 5-tert-butylisophthaloyl dichloride, respectively, in the presence of AlCl3 as catalyst. Friedel-Crafts polymerization of either of these two novel oligomers with tert-butylisophthaloyl dichloride, isophthaloyl dichloride or 1,6-hexanedioyl dichloride gave six novel PEKK's, having Tg's in the range of 135--180°C, but only the naphthalene-based PEKKs displayed Tm's between 130 and 345°C. PEKK's containing the 5-tert-butylisophthaloyl group are soluble in polar solvents such as N,N-dimethylacetamide, N-methyl-2-pyrrolidone, N,N-dimethylformamide, THF, chloroform etc. Polymer PA1, which has a fully unsubstituted aromatic chain structure, is insoluble in common organic solvents and, moreover, shows polymorphism. Intrinsic viscosities and adhesion behavior of soluble PEKKs were also determined.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
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