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  • 1
    Electronic Resource
    Electronic Resource
    Herstellung und eigenschaften von pfropfcopolymerisaten des vinylacetats auf ataktischem polypropylen (1985)
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 130 (1985), S. 99-109 
    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: The applicability of atactic polypropylene is investigated in the graft polymerization with vinyl acetate. The obtained graft products with different compositions are characterized with reference to swell behaviour, glass transition temperature and graft parameters. After compounding of the graft products with polyvinylchloride the mechanical properties are represented in relation to the quantity and composition of the incorporated graft products.
    Notes: Die Verwendbarkeit von ataktischem Polypropylen als Pfropfgrundlage für die Pfropfcopolymerisation mit Vinylacetat wird untersucht. Die erhaltenen Pfropfprodukte werden hinsichtlich ihres Quellverhaltens und bezüglich ihrer Glasumwandlungstemperaturen und Pfropfparameter bei unterschiedlichen Pfropfproduktzusammensetzungen charakterisiert.Nach Abmischung der Pfropfprodukte mit Polyvinylchlorid werden einige mechanische Eigenschaften sowohl in Abhängigkeit von der Menge des enthaltenen Pfropfproduktes als auch von der Zusammensetzung der Pfropfcopolymerisate dargestellt.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/apmc.1985.051300108
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  • 2
    Electronic Resource
    Electronic Resource
    Modell zur beschreibung der glasübergangstemperaturen binärer und ternärer mischungen von poly(styrol-co-n-butylmethacrylat)en (1995)
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 231 (1995), S. 187-198 
    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: Glass transition temperatures of binary and ternary blends of chemically uniform poly(styrene-co-n-butyl methacrylate)s with a mean content of 30.8 wt.-% of n-butyl methacrylate and number-average molar masses in the range of 4900 and 67000 g/mol have been investigated in relation to their composition. The blends showed significant deviations from an ideal behaviour with reference to a linearity between glass transition temperature and composition.This phenomenon is described by a mathematical model where polynoms are particularly well suited to represent the glass transition temperatures of the blends, partly exceeding those of the pure components. Finally, various reasons of these deviations were discussed. Here, energetical interactions seem to be of considerable importance combined with a nonadditivity of volumes.
    Notes: Die Glasübergangstemperaturen binärer und ternärer Mischungen chemisch einheitlicher Poly(styrol-co-n-butylmethacrylat)e mit einem mittleren n-Butylmethacrylat-Anteil von 30,8 Gew.-% und unterschiedlichen zahlenmittleren Molmassen im Bereich von 4900 bis 67000 g/mol wurden in Abhängigkeit von der Zusammensetzung untersucht. Es wurden wesentliche Abweichungen vom idealen Verhalten bezüglich einer linearen Abhängigkeit zwischen Glasübergangstemperatur und Zusammensetzung festgestellt.Dieses Verhalten konnte mit einem mathematischen Modell dargestellt werden, wobei sich insbesondere Polynome zur Beschreibung der teilweise über den Werten der Ausgangskomponenten liegenden Glasübergangstemperaturen der Mischungen als geeignet erwiesen. Schließlich wurden verschiedene Ursachen für diese Abweichungen diskutiert, wobei offensichtlich energetische Wechselwirkungen verbunden mit einer Nichtadditivität der Volumina von wesentlicher Bedeutung sind.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/apmc.1995.052310116
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  • 3
    Electronic Resource
    Electronic Resource
    Ataktisches polypropylen als pfropfgrundlage für die monomeren vinylacetat und vinylchlorid. Herstellung undeigenschaften der pfropfprodukte (1990)
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 174 (1990), S. 105-117 
    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: The possibility of the application of atactic polypropylene is investigated as graft base for the preparation of graft copolymers of vinyl acetate and vinyl chloride respectively graft copolymers from vinyl acetate onto polypropylene as graft base for the preparation of graft copolymers of vinyl chloride in relation to the composition of the original mixture.After compounding of the graft products with polyvinyl chloride or ABS/polyvinyl-chloride mixtures selected mechanical properties are presented in relation to the quantity and composition of the incorporated graft copolymers.
    Notes: Die Möglichkeiten des Einsatzes von ataktischem Polypropylen als Pfropfgrundlage zur Herstellung von Pfropfcopolymerisaten des Vinylacetates und Vinylchlorids bzw. von Polypropylen-Vinylacetat-Pfropfprodukten als Pfropfgrundlage zur Herstellung von Pfropfcopolymerisaten des Vinylchlorids werden in Abhängigkeit von der Ausgangsgemischzusammensetzung untersucht.Nach Abmischung der Pfropfprodukte mit Polyvinylchlorid bzw. ABS/Polyvinylchlorid-Mischungen werden ausgewählte mechanische Eigenschaften sowohl in Abhängigkeit von der Menge des enthaltenen Pfropfproduktes als auch von der Zusammensetzung der Pfropfpolymerisate dargestellt.
    Additional Material: 10 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/apmc.1990.051740109
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  • 4
    Electronic Resource
    Electronic Resource
    Zum einfluß von oligomeren auf die eigenschaften von styrol-acrylnitril-copolymerisaten (1991)
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 187 (1991), S. 123-134 
    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: Oligomers of styrene and acrylonitrile are prepared and characterized. The influences of these oligomers on the properties of poly(styrene-co-acrylonitrile) are investigated up to a concentration level of 5 wt.-%. In relation to the mechanical properties, tensile strength and flexural strength are decreased and impact strength is improved by oligomers. Thermal properties, especially glass transition temperature and Vicat softening temperature are strongly influenced by oligomers. Rheological properties are characterized by melt flow index and determination of melt viscosity in relation to different shearing rates.The effects of processing conditions on the optical properties, transmission to light and yellowing factor, are demonstrated.
    Notes: Oligomere des Styrols und Acrylnitrils wurden isoliert und charakterisiert sowie ihr EinfluB auf die Eigenschaften von Styrol-Acrylnitril-Copolymerisaten bis zu einem Anteil von ca. 5 Gew.% im Polymerisat untersucht.Hinsichtlich der mechanischen Eigenschaften wurden Biegespannung und Zugfestigkeit mit steigendem Oligomergehalt erniedrigt, während die Schlagbiegefestigkeit verbessert wurde. Die thermischen Eigenschaften wurden besonders hinsichtlich Glasübergangstemperatur und Vicat-Erweichungstemperatur durch den Oligomergehalt stark beeinflußt. Rheologische Eigenschaften wurden durch Schmelzindex und Schmelzviskosität bei verschiedenen Schergeschwindigkeiten charakterisiert.Der Einfluß der Verarbeitungsbedingungen auf die optischen Eigenschaften, die Lichtdurchlässigkeit und den Gelbindex werden beschrieben.
    Additional Material: 9 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/apmc.1991.051870111
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  • 5
    Electronic Resource
    Electronic Resource
    On the graft polymerization of styrene and acrylonitrile onto polybutadiene in the presence of vinyl acetate. II. Properties of graft polymers (1992)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 45 (1992), S. 79-84 
    Details
    ISSN: 0021-8995
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: The properties of the graft polymers of styrene, acrylonitrile, and vinyl acetate onto polybutadiene rubber that were prepared for the modification of graft polymers of styrene and acrylonitrile onto polybutadiene (ABS polymers) by emulsion polymerization up to a high degree of conversion have been studied and discussed. Both the impact strength and notched impact strength of the graft polymers have been found to remarkably increase with a rising quantity of vinyl acetate, in particular, in the case of styrene substitution, whereas in the case of acrylonitrile substitution by vinyl acetate, the two characteristics become noticeably poorer. The effects of the vinyl acetate amount and the type of substituted monomers on bending strength, tensile strength, Vicat softening point, and glass transition temperature of the graft polymers are also clearly different. Furthermore, the properties of the above graft polymers blended with styrene/acrylonitrile copolymers have been studied.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1992.070450109
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  • 6
    Electronic Resource
    Electronic Resource
    Photomodification of a poly(acrylonitrile-co-butadiene-co-styrene) containing diaryltetrazolyl groups (1994)
    Bognor Regis [u.a.] : Wiley-Blackwell
    Journal of Polymer Science Part A: Polymer Chemistry 32 (1994), S. 1657-1664 
    Details
    ISSN: 0887-624X
    Keywords: photofunctionalization ; photocrosslinking ; synthetic membranes ; permselectivity ; pervaporation ; surface properties ; tetrazole ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: A new type of membrane polymer, containing a photosensitive moiety, was synthesized. The photochemically induced functionalization and crosslinking of poly [acrylonitrile-co-butadiene-co-styrene-co-2-(4-ethenyl) phenyl-5-phenyl-2H-tetrazole], ABSV, has been studied. A variety of dipolarophiles and phenolic compounds were applied to alter the polarity of the membrane surface. The functionalization and crosslinking were initiated by photoirradiation. DSC and contact angle measurements were used to characterize the modified polymer. Pervaporation experiments with a cyclohexane/benzene mixture (5 wt% benzene) were carried out, with the results showing, that the photochemical treatment significantly effects both permselectivity and flux. Solubility parameters were found to be useful to interpret the pervaporation data. In general, the selectivity towards benzene increases with the polarity of the membrane surface, i.e., with increasing polarity of the modifier. A mechanism to explain the influence of both functionalization and crosslinking on the membrane performance, is proposed. © 1994 John Wiley & Sons, Inc.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pola.1994.080320907
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  • 7
    Electronic Resource
    Electronic Resource
    On reactive processing of HDPE with 2-ethylhexyl acrylate (1996)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 61 (1996), S. 2403-2409 
    Details
    ISSN: 0021-8995
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Influencing plastic materials by reactive processing of polymer particles, as seen with extrusion processes for example, may be performed in an especially simple way and is described by taking the reactive processing of standard high-density polyethylene (HDPE) plastic material on a twin-screw extruder in the presence of a vinyl monomer as an example. In particular, the investigation deals with the influence of relatively low quantities - if compared with the comonomer portion - of 2-ethylhexyl acrylate on HDPE properties during polymerization. Furthermore, the effect of a powerful chain-transfer agent on the process of reactive processing and on the thermal-oxidative properties of the products made by use of them is shown. Doing this, carbon tetrabromide proved to be an efficient transfer agent. When presenting the properties of the formed extrudates, the mechanical and thermal characteristics and application-related tests, such as those on stress-cracking resistance, is emphasized. The findings of this investigation are discussed on the basis of correlating them to the lamellar thickness of crystallites and the density of tie-molecules. © 1996 John Wiley & Sons, Inc.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    The formation of oligomers in the inhibited thermal copolymerisation of styrene and acrylonitrile (1992)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 193 (1992), S. 3063-3071 
    Details
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: The formation of oligomers up to molecular weights as high as about 800 was investigated in the iodine- and 4-nitrosophenol-inhibited thermally initiated copolymerisation of styrene and acrylonitrile by using column exclusion chromatography. In contrast to other possible approaches, such as the estimation of the rate of inhibition by analysing the inhibition period or trapping the initiating radicals through spin traps, this method offers the advantage of detecting the molecular species appearing during the inhibition reaction by directly estimating their molecular weights even in the higher ranges. A structural assignment of the discovered species is suggested and supported by the results of copolymerisation statistics. With iodine and 4-nitrosophenol as inhibitors, the oligomers of the thermal reaction of copolymerisation initiation, the reaction products of inhibitors with initiating radicals, as well as components of a higher molecular weight were detected and classified, and the mechanisms of their formation are discussed.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/macp.1992.021931213
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  • 9
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    Tetrabenzo[a,c,g,i]fluorenyllithium and η5-Tetrabenzo[a,c,g,i]fluorenyltitanium Complexes (2006)
    American Chemical Society
    Details
    Publication Date: 2006-07-01
    Print ISSN: 0276-7333
    Electronic ISSN: 1520-6041
    Topics: Chemistry and Pharmacology
    Published by American Chemical Society
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  • 10
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    Effect of catalyst transition metal and ancillary ligand on syndiospecific polymerization of styrene (2006)
    Elsevier
    Details
    Publication Date: 2006-03-01
    Print ISSN: 0014-3057
    Electronic ISSN: 1873-1945
    Topics: Chemistry and Pharmacology , Physics
    Published by Elsevier
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