Morton A. Golub

Lomonosov Moscow State University

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T. Wydeven

Lockheed Martin (United States)

N. R. Lerner

Ames Research Center

Robert D. Cormia

Foothill College

Jorge Heller

Pacific Research Institute

C. Stephens

Trinity College Dublin

J. J. Shipman

Center for Drug Evaluation and Research

Robert V. Gemmer

Gas Technology Institute

Richard A. Kenley

Allergan (United States)

Lorie S. Finney

Surface Optics (United States)

Carolyn M. Rynard

SRI International

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Ames Research Center

National Aeronautics and Space Administration

SRI International

Centre National de la Recherche Scientifique

Menlo School

Lomonosov Moscow State University

Université de Rennes

Russian Academy of Sciences

A. N. Kosygin Moscow State Textile University

Institute of Molecular Physics

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AND I,I--DINITROETHA NE WITH ETHERTYPE SOLVENTS

Morton A. Golub M. V. Ershov V. I. Slovetskii S. A. Shevelev

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Thermal cyclization of 1,2‐polybutadiene and 3,4‐polyisoprene

Journal of Polymer Science Polymer Letters Edition (1973)

Morton A. Golub Ming-Ta Sung

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Atmospheric research

10.1002/pol.1973.130110210

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Citations (34)

Infrared study of the reaction of polyisoprene and polybutadiene with sulfur by the use of deuterated polymers (J. polymer sci., 58, 1063–1082, 1962)

Journal of Polymer Science Part A General Papers (1963)

J. J. Shipman Morton A. Golub

10.1002/pol.1963.100010222

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ChemInform Abstract: DIREKTE UND SENSIBILISIERTE PHOTOLYSE VERSCHIEDENER DICHLORBUTANE

Chemischer Informationsdienst Organische Chemie (1970)

Morton A. Golub

Abstract Die direkte Photolyse der reinenDichlorbutane (I)‐(IV) als Modellverbindungen für Vinylchloridpolymere bei 2537 Å, die als Hauptprodukt HCl liefert, wird untersucht und mit der in der Literatur beschriebenen entsprechenden Radiolyse verglichen.

10.1002/chin.197031210

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Reactions Of Atomic Oxygen {O(3P)} With Polybutadienes

NASA Tech Briefs (1991)

Morton A. Golub N. R. Lerner T. Wydeven

Report describes experimental study of chemical reactions of atomic oxygen in ground state {O(3P)} with polybutadienes and related polymers. Attention focused on such reactions because of adverse effects of environmental atomic oxygen on polymeric materials in low orbits around Earth.

Atomic oxygen

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Infrared study of the reaction of polyisoprene and polybutadiene with sulfur by use of deuterated polymers

Journal of Polymer Science (1962)

J. J. Shipman Morton A. Golub

Abstract An infrared study of the sulfur vulcanization process was carried out with very high cis polymers of isoprene‐ d 8 , isoprene‐3‐ d 1 and butadiene‐2,3‐ d 2 as well as the corresponding perprotio polymers. The use of deuterated polymers permitted more definitive interpretations of the spectral changes associated with vulcanization than those previously reported or were possible with the undeuterated polyisoprene or polybutadiene. It was concluded that the 10.4 μ band which develops in the spectrum of cis ‐polyisoprene on extended reaction with sulfur at 140°C., and which has been the subject of some controversy, arises largely from a combination of saturated ring structures, such as cyclic sulfides, and conjugated double bonds, and to a minor extent from shifted double bonds. In addition to the processes leading to these various structures, crosslinking also occurs, but it apparently produces no important changes in the spectra of the polyisoprene vulcanizate other than that associated with a decrease in the original unsaturation. Polybutadiene, in contrast to polyisoprene, undergoes extensive cis—trans isomerization when extensively vulcanized with sulfur. Apparently, ring formation and concurrent production of conjugated double bonds also occur, but there is only a very slight amount of double‐bond shifting in polybutadiene.

Isoprene

Degree of unsaturation

10.1002/pol.1962.1205816666

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Recent Advances in the Chemical Modification of Unsaturated Polymers

Rubber Chemistry and Technology (1982)

D. N. Schulz S. Richard Turner Morton A. Golub

Abstract This article surveys recent advances in the chemical modification of unsaturated polymers, with emphasis on the literature since 1974. Among the topics covered are hydrogenation, halogenation, cyclization, isomerization, epoxidation, cycloaddition, sulfonation, carbenation, and silylation. The olefin functionality is a useful target for modification because of its varied reactivity, and recent work in unsaturated polymer reaction chemistry has yielded significant discoveries and valuable new information. For example, modern synthetic reagents and catalysts (e.g., as phase-transfer catalysts) have been advantageously employed to improve process and/or product quality. Synthetic techniques have been refined to allow the selective modification of specific polymer microstructures or blocks. Moreover, new structural and mechanistic insights have been derived from the judicious use of model compounds and/or specialized characterization methods. The relationship between chemically modified polymer structure and properties is being more clearly defined, and sequence effects are beginning to be appreciated. Finally, important new applications (e.g., elastomers, plastics, motor oil additives) have been discovered for chemically modified diene polymers.

Chemical modification

Reactivity

10.5254/1.3535904

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Cis to Trans Isomerization of Polyisoprene

Rubber Chemistry and Technology (1959)

Morton A. Golub

Abstract Although polybutadiene readily undergoes photochemical or radiation chemical cis to trans isomerization in solution sensitized by bromine atoms or thiyl radicals, no such isomerization has been achieved with polyisoprene. Moreover, although polyisoprene has been isomerized to a variety of resins, no evidence for any cis to trans change in this polymer has been heretofore described. This communication reports the cis to trans isomerization of polyisoprene in solution catalyzed by elemental selenium at temperatures of around 180–200° C. A common structure was obtained having a cis/trans ratio estimated to lie somewhere between 50/50 and 60/40, starting with either the essentially all-cis polyisoprene (Hevea) or all-trans polyisoprene (balata). The mechanism presumably involves π complexing of the polymer double bonds with selenium in the manner depicted for the selenium-catalyzed isomerization of oleic acid and stilbene. A 2–3% solution of Hevea or balata in a suitable high-boiling solvent such as o-dichlorobenzene or tetralin, containing 0.5 g/l powdered selenium, was refluxed under nitrogen for 2–5 hours. Subsequently the solution was cooled, and filtered to remove the selenium which separated out. Methanol was added to the filtered solution to coagulate the polymer, which was washed with alcohol, airdried and its structure analyzed by infrared absorption procedures. The recovered polymers were lower in molecular weight than originally, dropping in a typical case (e.g., Hevea) from a viscosity average molecular weight of about 550,000 to 300,000.

Diimine

10.5254/1.3542440

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Plasma copolymerization of ethylene and tetrafluoroethylene

Journal of Polymer Science Part A Polymer Chemistry (1992)

Morton A. Golub T. Wydeven Robert D. Cormia

Abstract The plasma copolymerization of ethylene (ET) and tetrafluoroethylene (TFE) was investigated by means of IR and XPS analyses. The deposition rates for plasma ET/TFE copolymers, when plotted versus mol % TFE in the feed gas, gave a concave‐downward curve situated above the straight‐line joining the deposition rates for the respective plasma polymers, PPET and PPTFE, with the maximum rate at ∼ 70‐80 mol % TFE. This result, coupled with the finding that normalized absorbances of the CH and CF IR bands of ET/TFE copolymers had maxima at ∼ 20 and 80 mol % TFE, respectively, indicated a positive interaction between ET and TFE such that each monomer “sensitized” the plasma copolymerization of the other. As analyzed by XPS, CF groups dominated over CF 2 and CF 3 groups at 5‐70 mol % TFE, but at ≥ 80 mol % TFE, these moieties approached the relative proportions in PPTFE (CF 2 > CF 3 > CF). The plot of F/C ratio versus mol % TFE was concave‐upward and situated below the hypothetical straight‐line plot representing noninteracting, independent polymerization of ET and TFE, while the % F in the plasma copolymers was linear with mol % TFE. The F 1s mean binding energies of the ET/TFE plasma copolymers, which increased monotonically with % F, were consistently higher than those for several commercial polymers of fluorinated olefins at comparable values of % F. This result suggested clustering of CF n moieties in the plasma copolymers or the presence of F atoms in highly fluorinated environments. © 1992 John Wiley & Sons, Inc.

10.1002/pola.1992.080301303

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The Radiation Induced cis-trans Isomerization of Polybutadiene. I¹

Journal of the American Chemical Society (1958)

Morton A. Golub

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThe Radiation Induced cis-trans Isomerization of Polybutadiene. I1Morton A. GolubCite this: J. Am. Chem. Soc. 1958, 80, 8, 1794–1798Publication Date (Print):April 1, 1958Publication History Published online1 May 2002Published inissue 1 April 1958https://pubs.acs.org/doi/10.1021/ja01541a004https://doi.org/10.1021/ja01541a004research-articleACS PublicationsRequest reuse permissionsArticle Views144Altmetric-Citations36LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InRedditEmail Other access optionsGet e-Alertsclose Get e-Alerts

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10.1021/ja01541a004

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Citations (37)