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  • 1
    Electronic Resource
    Electronic Resource
    Hydrocarbon Chlorinations with Phosphorus Pentachloride1 (1963)
    s.l. : American Chemical Society
    The @journal of organic chemistry 28 (1963), S. 3173-3177 
    Details
    ISSN: 1520-6904
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/jo01046a053
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  • 2
    Electronic Resource
    Electronic Resource
    Nitrogen-containing monomers. III. Reactivity ratios of N-alkyl acrylamides with vinyl monomers (1963)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 7 (1963), S. 451-459 
    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 reactivity ratios in the copolymerizations of N-tert-octyl acrylamide, N-n-octyl acrylamide, and N,N-di-n-butyl acrylamide with styrene and methyl methacrylate have been determined, and the Alfrey-Price Q and e values calculated. The distributed monomer N,N-di-n-butyl acrylamide was found to be more reactive than either N-n-octyl or N-tert-octyl acrylamide, which were of about the same reactivity.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1963.070070204
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  • 3
    Electronic Resource
    Electronic Resource
    The butyllithium initiated bulk anionic polymerization of α-methylstyrene (1968)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 115 (1968), S. 64-72 
    Details
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Es wurde die durch Butyllithium angeregte Polymerisation von α-Methylstyrol in Substanz untersucht. Die sehr langsam verlaufenden Start- und Wachstumsschritte werden von Depolymerisations- und Nebenreaktionen wie z. B. Übertragung begleitet. Bei Temperaturen von 40-50°C findet außerdem ein Abbruch statt. Das Molekulargewicht des Polymeren nimmt bei steigender Konzentration an Initiator in nicht linearer Form ab. Die Molekulargewichtsverteilungen sind breit (M̄w/M̄n = 1,55 bis 2,2), was einer Polymerisation im Gleichgewicht entspricht. Diese Befunde zeigen Unterschiede zu früher veröffentlichten Ergebnissen, bei denen die Polymerisation durch Anregung mit Natrium erfolgte.
    Notes: Butyllithium (BuLi) initiates α-methylstyrene polymerization in bulk at room temperature. Both initiation and propagation reactions are very slow and propagation/depropagation occurs along with other side reactions, e.g., transfer. At slightly elevated temperatures (40-50°C) irreversible termination takes place. Molecular weights change inversely but not linearly with changes in [BuLi] and distributions are broad (M̄w/M̄n = 1.55 to 2.2) as would be expected from equilibria considerations. These results are generally different than those reported with sodium initiated reactions.
    Additional Material: 4 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/macp.1968.021150107
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  • 4
    Electronic Resource
    Electronic Resource
    Reaction of polystyryllithium with carbon dioxideThis work was supported in part by the Office of Naval Research under Contract No. Nonr 2693(00). (1964)
    New York : Wiley-Blackwell
    Journal of Polymer Science Part A: General Papers 2 (1964), S. 4545-4550 
    Details
    ISSN: 0449-2951
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: A benzene solution of polystyryllithium of narrow chain length distribution was found to react with carbon dioxide to form (upon acidification) not only the corresponding polystyrene carboxylic acid but also significant amounts of di-polystyryl ketone and tri-polystyryl carbinol. The amounts of the latter two products were somewhat dependent on the rate at which carbon dioxide could be added to the system. Thus, the yields of di-polystyryl ketone and tri-polystyryl carbinol were 28% and 12% respectively, if termination was accomplished by allowing gaseous carbon dioxide to diffuse into the system, but the total yield of these products was only 22% if the termination was carried out by pouring the polystyryllithium solution onto crushed, solid Dry Ice. Lithium polystyrene carboxylate was found to be partly associated in benzene and cyclohexane, but the free acid was not.
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1964.100021022
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  • 5
    Electronic Resource
    Electronic Resource
    Synthesis and polymerization of N[2-(2-methyl-4-oxopentyl)]-acrylamide-A new reactive vinyl monomerPaper presented at the 147th meeting of the American Chemical Society, Philadelphia, Pennsylvania, April 1964. (1965)
    New York : Wiley-Blackwell
    Journal of Polymer Science Part A: General Papers 3 (1965), S. 1601-1608 
    Details
    ISSN: 0449-2951
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: The synthesis and polymerization reactivity of N[2-(2-methyl-4-oxopentyl)]-acrylamide (diacetone acrylamide) is described. This reactive vinyl monomer is prepared in good yield from acetone, acrylonitrile and sulfuric acid. Diacetone acrylamide is a white crystalline solid with the water solubility characteristics of acrylamide and the organic solvent solubility of N-alkyl acrylamides. Diacetone acrylamide readily homopolymerizes and forms copolymers with a wide variety of comonomers. Reactivity ratios in the copolymerization of diacetone acrylamide with styrene and methyl methacrylate are reported and the Alfrey-Price Q and e values calculated. These results, along with data from the copolymerization of diacetone acrylamide with a group of typical vinyl monomers, are presented to indicate the high reactivity of this new monomer.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1965.100030427
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  • 6
    Electronic Resource
    Electronic Resource
    Synthesis of low molecular weight polystyrene (1965)
    New York : Wiley-Blackwell
    Journal of Polymer Science Part A: General Papers 3 (1965), S. 2719-2719 
    Details
    ISSN: 0449-2951
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1965.100030731
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  • 7
    Electronic Resource
    Electronic Resource
    Glass temperature and crystal modification of linear polymethylene (1965)
    New York : Wiley-Blackwell
    Journal of Polymer Science Part A: General Papers 3 (1965), S. 3781-3786 
    Details
    ISSN: 0449-2951
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: The preparation of high molecular weight linear polymethylene is described at low temperatures. The onset of a polymorphic transformation (triclinic to orthorhombic) is observed on warming this low crystallinity (∼50%) polymer to about -25°C. Relative rates of transformation above this temperature are also given. No significant increase in crystallinity occurs on warming the polymer up to room temperature, where some triclinic phase still persists. Annealing polymethylene at 100°C. leaves only the orthorhombic material which is approximately 80% crystalline. A glass transition temperature around -30°C., is reported for the low crystallinity polymer.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1965.100031109
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  • 8
    Electronic Resource
    Electronic Resource
    Preparation and characterization of some star-and comb-type branched polystyrenes (1965)
    New York : Wiley-Blackwell
    Journal of Polymer Science Part A: General Papers 3 (1965), S. 4131-4151 
    Details
    ISSN: 0449-2951
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Star-type polystyrenes, polymers with p branches attached to a common multifunctional center, and comb-type polystyrenes, polymers with an average of p branches attached at random to a polymeric backbone, have been prepared by the reactions, respectively, of polystyryllithium of narrow chain length distribution with appropriate p-functional molecules or with backbone polystyrene chains of narrow chain length distribution, containing the prerequisite number of benzylic-type chloromethyl groups. The synthesis, isolation, and characterization of these types of polymers are illustrated by specific examples. Problems which are inherent to the system, e.g., metal-halogen interchange reactions, different reactivities of the chloromethyl groups, isomerization of the polystyryllithium, and other possible reactions and their consequences are discussed.
    Additional Material: 6 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1965.100031209
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  • 9
    Electronic Resource
    Electronic Resource
    Synthesis of low molecular weight polystyrene by anionic techniques and intrinsic viscosity-molecular weight relations over a broad range in molecular weightSynthesis studies supported in part by the Office of Naval Research under Contract No. Nonr 2693(00). Dilute solution viscosity studies supported in part by Aeronautical Systems Division, Wright-Patterson Air Force Base under Contract No. AF 33(657)-10661.Paper presented at the 145th Meeting, American Chemical Society, New York, September 1963.1 (1964)
    New York : Wiley-Blackwell
    Journal of Polymer Science Part A: General Papers 2 (1964), S. 4533-4544 
    Details
    ISSN: 0449-2951
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Anionic polymerization techniques have been used to prepare low molecular weight (M ≤ 10,000) polystyrene of M̄w/M̄n ≤ 1.1. The preparation and characterization of polymers are described. Good agreement with results reported by others was obtained for the viscosity-molecular weight relation in benzene at 25°C., viz. [η] = 1.0 × 10-3 M̄n0.5, for 500 〈 M̄n ≤ 10,000. For high molecular weight fractions (2.5 × 104 〈 M ≤ 1.5 × 106) of anionically prepared polystyrene, the expression, [η] benzene = 8.5 × 10-5M0.75, was found to be applicable and in agreement with relations given in the literature. Under theta conditions - cyclohexane as solvent at 34.5°C. - a single expression, [η] = 8.4 × 10-4M0.5, was found to apply over the entire molecular weight range, 500 〈 M ≤ 1.5 × 106.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1964.100021021
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  • 10
    Electronic Resource
    Electronic Resource
    Comparison of some mechanical and flow properties of linear and tetrachain branched “monodisperse” polystyrenes (1965)
    New York : Wiley-Blackwell
    Journal of Polymer Science Part A: General Papers 3 (1965), S. 681-696 
    Details
    ISSN: 0449-2951
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: The strength and flow properties of narrow distribution polystyrenes have been studied as functions of molecular weight and branching (tetrachain star-type molecules). Most of the mechanical properties of linear and branched narrow distribution polystyrenes were essentially the same as those for a broad distribution general-purpose polystyrene. For the narrow distribution linear polymers the value of a given property increased rapidly with molecular weight until ca. M = 1.6 × 105. Thereafter the magnitude of the property increased only slightly for rather large increases in M and asymptotically approached a maximum. The same was true of the branched polymers except that certain properties, e.g., tensile strength, were found to level off in value at higher molecular weights than for the corresponding linear polymers. Studies of apparent melt viscosity, η, made with a capillary rheometer showed that at low shear rates (\documentclass{article}\pagestyle{empty}\begin{document}$ (\dot \gamma 〈 10) $\end{document} sec.-1), the branched polymers exhibited much lower apparent values of η than linear polymers of the same total molecular weight. At high shear rates (\documentclass{article}\pagestyle{empty}\begin{document}$ (\dot \gamma \sim 2000) $\end{document} sec.-1), this difference essentially disappeared and η approached a constant value independent of \documentclass{article}\pagestyle{empty}\begin{document}$ \dot M(1.5 \times 10^5 - 4.5 \times 10^5) $\end{document} and branching. Melt viscosity data for both the linear and branched narrow distribution polymers when plotted in the form of reduced viscosities versus a function of \documentclass{article}\pagestyle{empty}\begin{document}$ \dot \gamma $\end{document} (as suggested by Bueche) fell upon one master curve.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1965.100030224
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