Differentialkalorimetrie (DSC) einiger monomerer und polymerer Azoverbindungen

Nuyken, Oskar; Gerum, Johannes; Steinhausen, Rainer

doi:10.1002/macp.1979.021800609

Cited by 41 publications

(10 citation statements)

References 13 publications

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“…Nuyken et al 25 have shown that there is an excellent agreement between this technique and the more conventional ones like u.v. spectroscopy and volumetry.…”

Section: The Immobilized Radical Initiatormentioning

confidence: 75%

Grafting kinetics of poly(methyl methacrylate) on microparticulate silica

Boven

Oosterling

Challa

et al. 1990

Polymer

137

123

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Grafting of poly(methyl methacrylate) (PMMA) on microparticulate silica was achieved by initiating the polymerization of MMA by 4,4'-azobis(4-cyanopentanoic acid) that was covalently bound to the silica surface. The initiator seems to be destabilized upon binding it to the silica surface. The kinetics of the graft polymerization are described and are largely affected by the Trommsdorff effect, which makes it possible to graft a high amount of PMMA on silica.

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“…Nuyken et al 25 have shown that there is an excellent agreement between this technique and the more conventional ones like u.v. spectroscopy and volumetry.…”

Section: The Immobilized Radical Initiatormentioning

confidence: 75%

Grafting kinetics of poly(methyl methacrylate) on microparticulate silica

Boven

Oosterling

Challa

et al. 1990

Polymer

137

123

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“…We have used d.s.c, to calculate the Arrhenius constants of the decomposition of the radical initiators. Nuyken et al 25 have shown that there is an excellent agreement between this technique and the more conventional ones like u.v. spectroscopy and volumetry.…”

Section: The Immobilized Radical Initiatormentioning

confidence: 75%

Grafting kinetics of poly(methyl methacrylate) on to microparticulate silica

1991

Composites

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“…Rate constants for a variety of temperatures can be obtained by a single experiment [8,9,10] and the sample size is small. The results are summarized in table 1.…”

Section: Resultsmentioning

confidence: 99%

Surface active azogroup-containing polymers and their use in emulsion polymerization

Dicke

Heitz

1982

Colloid & Polymer Sci

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Polymeric azoinitiators have been obtained by the acidcatalyzed polyreaction of azobisisobutyronitrile (AIBN) with tetraethylene glycol (TEG) and 1.6-hexanediol resp. The kinetics of decomposition of these polyazoesters were investigated by differential scanning calorimetry (DSC) resulting in an activation energy of Ea = 124.5 KJ/mol and a frequency factor of A = 3.6 9 10 TM sec -1.The polyazoesters were used to initiate radical polymerization of acrylamide limiting the decomposition of the initiator to 37%. The resulting polyacrylamides containing azogroups had molecular weights between 50 000 and 250 000 g/mol, They are surface active polymers having a critical micell concentration of 0.1 to 0.3 g./1. By use of these polyacrylamides as an emulsifying initiator system stable emulsions of polymers were obtained without additional use of a tenside. Polymethacrylic acid containing azogroups can be used as well as an emulsifying initiator. The latex particles are stabilized by a solvated shell of a polymer. Thus it is possible to obtain stable emulsions in organic solvents by use of an azogroup-containing prepolymer which is soluble in that solvent. An emulsion of polyacrylamide in methanol ohtained by use of an azogroup-containing polyvinylacetate is an example.

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Differentialkalorimetrie (DSC) einiger monomerer und polymerer Azoverbindungen

Cited by 41 publications

References 13 publications

Grafting kinetics of poly(methyl methacrylate) on microparticulate silica

Grafting kinetics of poly(methyl methacrylate) on microparticulate silica

Grafting kinetics of poly(methyl methacrylate) on to microparticulate silica

Surface active azogroup-containing polymers and their use in emulsion polymerization

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