Library

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    Electronic Resource
    Electronic Resource
    Formation of high molecular weight polythiiranes in aqueous-organic media (1984)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 185 (1984), S. 899-904 
    Details
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: The influence of water on the polymerization of thiirane and 2-methylthiirane with CdCO3 was studied. The polymerization process takes place only when a large interface monomer-water is formed. This is achieved by the presence of an amount of water in the reaction mixture which is comparable with that of the monomer. The polarity of the solvent does not influence the rate of formation of poly(2-methylthiirane). The polymerization is carried out in the mass of monomer or in the presence of an alcohol and a solvent not miscible with water.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/macp.1984.021850506
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Crosslinking reactions of polyphenylene type polymers containing acetyl end-groups with bis(hydridosilyl) derivatives of o-carborane alcohols (1990)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 191 (1990), S. 801-807 
    Details
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Crosslinking reactions of prepolymers of the polyphenylene type carrying acetyl end-groups, based on 4,4′-oxydiacetophenone and acetophenone (FPP-1), or 4-acetylacetophenone and 4-(4-acetylphenoxy)phenyl-o-carborane (FPP-2), by means of 20-80 wt.-% of 1,2-bis[hydrido-(dimethyl)siloxymethyl]-o-carborane (1) were investigated. It was found that the prepolymer FPP-1 is easily crosslinked in the presence of 30 wt.-% of 1 at 300°C, and the prepolymer FPP-2 at 350°C.
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/macp.1990.021910408
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Crosslinking reactions of polyphenylene type polymers containing acetyl end-groups with o-carboranylmethoxy-containing organosilazanes (1990)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 191 (1990), S. 809-814 
    Details
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Carborane-containing oligoorganosilazanes (COS) (20 to 60 wt.-%) prepared by coammonolysis of (o-carboranylmethoxy)dichloro(phenyl)silane and trichloro(phenyl)silane (COS 1), or 1-chloro-1-phenyl-1-sila-2,7-dioxa-4,5-(1,2-carborano)cycloheptane and dichloro(dimethyl)-silane (COS 2), were used to crosslink polyphenylene type prepolymers on the basis of 4,4′-oxydiacetophenone and acetophenone (FPP-1). This allowed the reduction of the crosslinking temperature of FPP-1 by 100-150°C, retaining a high heat resistance of the final crosslinked polymer. Octamethylcyclotetrasilazane (15 wt.-%) was used to crosslink the carborane-containing prepolymers on the basis of 1,2-bis[4-(4-acetylphenoxy)phenyl]-o-carborane and acetophenone (FPP-2) and 1,2-bis(4-acetylbenzyl)-o-carborane and acetophenone (FPP-3). At 350°C a polymer was formed with a gel fraction amounting to 94%.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/macp.1990.021910409
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Proton-transfer polyaddition reactions in syntheses of linear, branched, and functionalized poly(p-divinyl aromatics). I. Synthesis, kinetics, and mechanism of formation of linear unsaturated poly[bis(p-vinylphenyl) ether] (1996)
    Bognor Regis [u.a.] : Wiley-Blackwell
    Journal of Polymer Science Part A: Polymer Chemistry 34 (1996), S. 1165-1181 
    Details
    ISSN: 0887-624X
    Keywords: bis(p-vinylphenyl) ether ; step-polymerization ; polymer structure ; mechanism ; kinetics ; molecular weight distribution ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: A peculiar step-growth (cationic) polymerization of bis(p-vinylphenyl) ether (BVPE) in nonpolar or slightly polar aromatic solvents in the temperature range from 70 to 150°C in the presence of 2.5-5.0 mmol/L of p-toluenesulfonic acid has been studied. Optimum polymerization conditions were found. New linear unsaturated polymers of BVPE with terminal vinyl groups and weight-average molecular weight from 1500 to 10,000 were obtained. The structure and the formation mechanism of these oligomers and polymers were established, and the accompanying side reactions were considered. The rate constants were measured for eight temperatures, and the activation energy was found to be -42 kJ/mol. The optimum polymerization temperature was about 80°C. © 1996 John Wiley & Sons, Inc.
    Additional Material: 14 Ill.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
  • 5
    Electronic Resource
    Electronic Resource
    Morphology control at phase separation of curing multicomponent thermosets (1996)
    New York, NY : Wiley-Blackwell
    Polymers for Advanced Technologies 7 (1996), S. 356-364 
    Details
    ISSN: 1042-7147
    Keywords: heterophase polymers ; cure reaction-induced phase separation ; morphology ; criterion of equilibrium ; toughened epoxies ; epoxy-rubber polymers ; adhesion interaction between phases ; 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
    Notes: The process of phase separation in the course of the thermoset curing reaction is considered. Clarification of the role of kinetic factors in such processes is the focus of the article, and the need in a kinetic theory for cure reaction-induced phase separation (CRIPS) is substantiated. An adequate nonequilibrium approach proposed previously is given further development. A new CRIPS model with equilibrium boundary conditions is introduced.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
  • 6
    Electronic Resource
    Electronic Resource
    Bound water in the collagen-like triple-helical structure (1992)
    New York : Wiley-Blackwell
    Biopolymers 32 (1992), S. 189-195 
    Details
    ISSN: 0006-3525
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The ir amide bands of the triple-helical polytripeptides and collagens upon hydration of films are investigated. On the basis of our assignment of the amide I components, the formation of hydrogen bonds between the peptide backbone and structural water is studied. The C1O1 - HOH hydrogen bonds are found more ordered than the C3O3 - HOH hydrogen bonds. The specific incorporation of water in the triple helix is followed by multistep conformational changes and by increasing of the interpeptide hydrogen-bond strength. The formation of the polypeptide hydrate structure depending on the amino acid composition and the chain length is examined.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bip.360320209
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...