Anmelden/Registrieren
Zurück zur geteilten Ansicht
Verfasser Titel Jahr
zeige Details Friis, N.., Hamielec, A. E.. Kinetics of vinyl chloride and vinyl acetate emulsion polymerization
in: Journal of Applied Polymer Science, in: Journal of Applied Polymer Science . - New York, NY [u.a.] : Wiley, ISSN 0021-8995, ZDB-ID 1491105-x Vol. 19 (1. 1975), p. 97-113
Zugang: zum Volltext
ähnliche Vorschläge
1975
The kinetics of vinyl chloride and vinyl acetate emulsion polymerization are reexamined. The validity of Ugelstad's model for systems with high desorption rate is confirmed by simulating conversion histories for both systems at different initiator concentrations and particle numbers. On the basis of the model, it is shown that at ordinary initiation rates, termination reactions are unimportant with respect to molecular weight development in both systems, and as a consequence, molecular weight development is independent of number and size distribution of polymer particles and of initiator and emulsifier level. Based on this conclusion, it is shown that in accordance with experimental facts, the molecular weight distribution obtained in vinyl chloride emulsion polymerization is the most probable distribution, and it is concluded that the number of long-chain branch points per repetition unit is less than 2 × 10-4 at high conversions. In vinyl acetate emulsion polymerization, an almost logarithmic normal distribution is obtained. The distribution is strongly broadened by branching reactions with the number of long-chain branch points increasing rapidly with monomer conversion. The increase of Mn with increasing conversion is due to terminal double-bond polymerization, while the increase in Mw is due mainly to transfer to polymer.
Copyright: Copyright © 1975 John Wiley & Sons, Inc.
beteiligte Personen: Friis, N.. , Hamielec, A. E..
Format: Elektronisch
Sprache: English
Erschienen: 1975.
Serie: Wiley InterScience Backfile Collection 1832-2000 [Dig. Serial]
Schlagwörter:
URL: http://dx.doi.org/10.1002/app.1975.070190108

Ähnliche Vorschläge

Zurück zur geteilten Ansicht
Verfasser Titel Jahr
zeige Details Nomura, Mamoru., Harada, Makoto. Rate coefficient for radical desorption in emulsion polymerization
in: Journal of Applied Polymer Science, in: Journal of Applied Polymer Science . - New York, NY [u.a.] : Wiley, ISSN 0021-8995, ZDB-ID 1491105-x Vol. 26 (1. 1981), p. 17-26
Zugang: zum Volltext
ähnliche Vorschläge
1981
zeige Details Malzahn, R. A.., Griffith, J. H.., ... Polymers and copolymers of vinyl pinolate and some reactions with isocyanatesThis is a partial report of work done under contract with the four Utilization Research and...
in: Journal of Polymer Science Part A: General Papers, in: Journal of Polymer Science Part A: General Papers . - New York : John Wiley & Sons, Inc., ISSN 0449-2951 Vol. 2 (12. 1964), p. 5047-5056
Zugang: zum Volltext
ähnliche Vorschläge
1964
zeige Details Delgado, Joaquin., El-Aasser, Mohamed S.., ... Miniemulsion copolymerization of vinyl acetate and butyl acrylate. I. Differences between the miniemulsion copolymerization and the emulsion copolymerization processes
in: Journal of Polymer Science Part A: Polymer Chemistry, in: Journal of Polymer Science Part A: Polymer Chemistry . - Bognor Regis [u.a.] : Wiley, ISSN 0887-624X, ZDB-ID 1473076-5 Vol. 24 (5. 1986), p. 861-874
Zugang: zum Volltext
ähnliche Vorschläge
1986
zeige Details Chern, Chorng-Shyan., Poehlein, Gary W.. Reaction kinetics of vinyl acetate emulsion polymerization
in: Journal of Applied Polymer Science, in: Journal of Applied Polymer Science . - New York, NY [u.a.] : Wiley, ISSN 0021-8995, ZDB-ID 1491105-x Vol. 33 (6. 1987), p. 2117-2136
Zugang: zum Volltext
ähnliche Vorschläge
1987
zeige Details Butucea, V.., Sârbu, A.., ... Kinetic model for continuous emulsion polymerization of vinyl chloride at subsaturation pressure
in: Acta Polymerica, in: Acta Polymerica . - Weinheim : Wiley-VCH, ISSN 0323-7648, ZDB-ID 1474947-6 Vol. 36 (7. 1985), p. 389-392
Zugang: zum Volltext
ähnliche Vorschläge
1985