ISSN:
0887-624X
Schlagwort(e):
Chemistry
;
Polymer and Materials Science
Quelle:
Wiley InterScience Backfile Collection 1832-2000
Thema:
Chemie und Pharmazie
Notizen:
For emulsion polymerization in the zero order region (Interval II) a relation between the average number of free radicals per particle, n̄(t), and the particle number average volume of a particle, v̄n(t), is derived as dv̄n(t)/dt = Kn̄(t), where K is volume growth rate of a particle containing one free radical and is constant. This relation is also extended to copolymerization systems with an appropriate modification of the definition of K. By use of the data of particle size distribution (PSD), n̄ can be calculated without knowing the total number of particles. In conjunction with this relation, the recently developed light-scattering technique for measuring the PSD in addition to the conventional transmission electron microscope technique can provide a quick route for determination of n̄. Styrene and methyl methacrylate emulsion homopolymerizations are taken as calculation examples.
Zusätzliches Material:
2 Tab.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1002/pola.1990.080281022
