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1

Digitale Medien

Condensation polymers from 1,2,5-thiadiazole-3,4-dicarboxylic acid (1973)

Macdonald, Robert N. ; Sharkey, W. H.

New York : Wiley-Blackwell

Journal of Polymer Science: Polymer Chemistry Edition 11 (1973), S. 2519-2536

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ISSN: 0360-6376

Schlagwort(e): Physics ; Polymer and Materials Science

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Chemie und Pharmazie

Notizen: A series of polyamides was prepared by interfacial polymerization of diamines with 1,2,5-thiadiazole-3,4-dicarbonyl chloride. Polyamides from secondary cycloaliphatic diamines and aromatic diamines have high softening points, high glass transition temperatures, and good thermal stability. Secondary amines, in particular cycloaliphatic secondary amines, form very high molecular weight polyamides. The polyamide from trans-2,5-dimethylpiperazine and 1,2,5-thiadiazole-3,4-dicarbonyl chloride is soluble in chloroform and 1,1,2-trichloroethane and has been cast into films and spun into fibers from those solvents. Fibers of this polymer are strong and have very high work recovery from small strains. In addition, these fibers show good retention of strength and work recovery over a range of temperatures and humidities.

Zusätzliches Material: 10 Tab.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/pol.1973.170111008

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2

Digitale Medien

Polymers from intermediates obtained from hydrogen cyanide (1974)

MacDonald, Robert N. ; Cairncross, Allan ; Sieja, J. B. ; [weitere]

New York : Wiley-Blackwell

Journal of Polymer Science: Polymer Chemistry Edition 12 (1974), S. 663-678

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ISSN: 0360-6376

Schlagwort(e): Physics ; Polymer and Materials Science

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Chemie und Pharmazie

Notizen: The recent demonstration of an easy synthesis of diiminosuccinonitrile (DISN) from hydrogen cyanide and cyanogen, the reduction of DISN to diaminomaleonitrile (DAMN), and the use of these compounds to form difunctional heterocycles has made several new polyamide intermediates accessible. The 1- and 2-methyl-1,2,3-triazole-4,5-dicarbonyl chlorides have been polymerized interfacially to form high-melting polyamides of good heat stability. Interfacial polymerization of 1-methylimidazole-4,5-dicarbonyl chloride and trans-2,5-dimethylpiperazine has given a polyamide that is water-soluble. The 2,6- and 2,3-pyrazinedicarbonyl chlorides have been similarly converted to high-melting polyamides. 2,6-Dicyano-3,5-dipiperazinylpyrazine has been prepared from tetracyanopyrazine and piperazine and reacted with toluene diisocyanate to form a strong, stiff polyurea. Polyamides were also made from 2,3-diaminoquinoxaline, 1,4,5,6-tetrahydro-5,6-dioxo-2,3-pyrazinedicarbonitrile, and DAMN.

Zusätzliches Material: 5 Tab.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/pol.1974.170120316

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3

Digitale Medien

Fluorothiocarbonyl compounds. V. Polymerization of thiocarbonyl compoundsFor Part IV in this series, see Middleton.1Presented in part at the 145th Meeting of the American Chemical Society, September, 1963, New York, N. Y. (1965)

Middleton, W. J. ; Jacobson, H. W. ; Putnam, R. E. ; [weitere]

New York : Wiley-Blackwell

Journal of Polymer Science Part A: General Papers 3 (1965), S. 4115-4129

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ISSN: 0449-2951

Schlagwort(e): Chemistry ; Polymer and Materials Science

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Chemie und Pharmazie , Physik

Notizen: Thiocarbonyl fluoride, fluoroalkylthio acid fluorides, and fluorothioketones are converted to high molecular weight polymers by anionic initiation at low temperatures. Amorphous poly(thiocarbonyl fluoride), (CF2S)n, is a tough elastomer that is highly resilient. Poly(thiocarbonyl fluoride) has a melting point of 35°C. and slowly crystallizes at room temperature to an opaque, stiff plastic. The glass transition point of the polymer is very low, being -118°C. as determined by the torsion pendulum method. Poly(trifluorothioacetyl fluoride) and polyhexafluorothioacetone are also elastomeric, but neither has the high resilience that is characteristic of poly(thiocarbonyl fluoride). Polyhexafluorothioacetone slowly depolymerizes at room temperature.

Zusätzliches Material: 4 Tab.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/pol.1965.100031208

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4

Digitale Medien

Characterization and polymerization of thioacetoneIn honor of C. S. Marvel on the occasion of his 75th birthday. (1970)

Lipscomb, R. D. ; Sharkey, W. H.

New York : Wiley-Blackwell

Journal of Polymer Science Part A-1: Polymer Chemistry 8 (1970), S. 2187-2196

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ISSN: 0449-296X

Schlagwort(e): Physics ; Polymer and Materials Science

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Chemie und Pharmazie

Notizen: The thioketo and thioenol tautomers of thioacetone have been separated by gas chromatography and characterized by infrared and NMR spectra at low temperatures. The pure thioketo tautomer polymerizes rapidly at room temperature, but the thioenol tautomer does not. At room temperature, the thioenol gradually disappears, probably by tautomerization to the reactive thioketo form, which then polymerizes. Attempts to copolymerize thioacetone with vinyl and diene monomers were not successful.

Zusätzliches Material: 4 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/pol.1970.150080826

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5

Digitale Medien

Fluorodienes. V. Copolymerization of 1,1,4,4-tetrafluoro-1,3-butadiene with oxygen and nitric oxideFor Paper IV in this series, see Putnam et al.1 (1966)

Putnam, R. E. ; Sharkey, W. H.

New York : Wiley-Blackwell

Journal of Polymer Science Part A-1: Polymer Chemistry 4 (1966), S. 2289-2293

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ISSN: 0449-296X

Schlagwort(e): Physics ; Polymer and Materials Science

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Chemie und Pharmazie

Notizen: 1,1,4,4-Tetrafluoro-1,3-butadiene reacts with oxygen to form a polyperoxide containing 1.0-1.1 peroxide groups for each diene unit. This polymer behaves like a typical peroxide. It explodes violently when heated to 120°C. or when subjected to shock, and it initiates polymerization of vinyl monomers at temperatures of 90°C. or higher. The tetrafluorobutadiene also copolymerizes with nitric oxide to give a highly crosslinked polymer containing three molecules of diene for each two molecules of nitric oxide.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/pol.1966.150040922

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6

Digitale Medien

Fluorothiocarbonyl compounds. VI. Free-radical polymerization of thiocarbonyl fluoridePaper V in this series is by W. J. Middleton et al.1 (1966)

Barney, A. L. ; Bruce, J. M. ; Coker, J. N. ; [weitere]

New York : Wiley-Blackwell

Journal of Polymer Science Part A-1: Polymer Chemistry 4 (1966), S. 2617-2636

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ISSN: 0449-296X

Schlagwort(e): Physics ; Polymer and Materials Science

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Chemie und Pharmazie

Notizen: Thiocarbonyl fluoride, CF2=S, and thiocarbonyl chlorofluoride, CFCl=S, undergo addition polymerization in free radical-initiated systems. In addition, both compounds copolymerize with various unsaturated compounds, including typical vinyl and vinylidene monomers. The chlorofluoride, because of its rapid polymerization rate, copolymerizes best with very active monomers, of which 2,3-dichloro-1,3-butadiene is an example. Thiocarbonyl fluoride polymerizes best at low temperatures. The trialkylborane - oxygen redox couple has been adapted to free-radical polymerizations and copolymerizations from -60 to -120°C. With such initiation CF2=S has been copolymerized with terminal and internal olefins, vinyl compounds, allyl compounds, and acrylic esters. Copolymerization with propylene is unusual, in that it proceeds in a manner that strongly favors a product composed of two molecules of CF2=S for each propylene. In other cases, product compositions are more responsive to the ratio of monomers charged.

Zusätzliches Material: 11 Tab.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/pol.1966.150041024

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7

Digitale Medien

Polymers containing polyhedral borane rings I. Condensation polymersPaper presented at the Gordon Conference on Polymers, July 1966. (1971)

Schaefgen, J. R. ; Miller, H. C. ; Sauer, J. C. ; [weitere]

New York : Wiley-Blackwell

Journal of Polymer Science Part A-1: Polymer Chemistry 9 (1971), S. 51-68

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ISSN: 0449-296X

Schlagwort(e): Physics ; Polymer and Materials Science

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Chemie und Pharmazie

Notizen: The preparation and properties of a unique new class of polymers containing polyhedral borane cages as part of the backbone polymer chain are described. The synthesis of polyamides, polyesters, polyureas, and polyurethanes proceeds from suitably chosen B10 and B12 polyhedral borane dicarbonyls, diols, and diisocyanates by typical condensation polymer techniques. Each complementary monomer may be a borane compound, but more often higher molecular weight products are provided when one monomer is a conventional organic reagent such as an aromatic diisocyanate. The polyamides prepared from 1, 12-B12H10(CO)2 and organic diamines were crystalline and soluble, but molecular weight were limited because the amidation reaction was reversible and/or the amide linkage could be split by nucleophilic attack by some solvents. The polyurethanes prepared from Na2B12H10(OH)2 and aromatic diisocyanates were high molecular weight and relatively more stable. Clear, colorless, tough films were prepared. These polymers were soluble in many polar solvents and exhibited typical polyelectrolyte behavior.

Zusätzliches Material: 3 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/pol.1971.150090105

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