ISSN:
0323-7648
Keywords:
Chemistry
;
Polymer and Materials Science
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
,
Physics
Notes:
A study of the low-angle region of the static structure factor S(q) (q = (4π/λ) sin(θ/2); θ: scattering angle, λ: wavelength of the radiation in the medium) of a concentrated (44 wt.%) poly(methyl-methacrylate) (PMMA) latex by turbidimetry is presented. It is demonstrated that S(0), i.e., the structure factor extrapolated to vanishing scattering angle can be obtained in excellent accuracy up to the highest concentrations. Since S(0) reflects the balance between long-range attractive and short-range repulsive forces between the latex particles, this quantity can be used to assess the stability of the latex against flocculation. Special attention has been paid to the influence of polydispersity on S(0). The analysis of S(q) in the vicinity of q = 0 for the system under consideration indicates the absence of attractive forces between the particles.
Additional Material:
5 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/actp.1996.010470803
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