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Light scattering study of stereocomplex behaviour in solutions of poly(methyl methacrylate)

Authors
Journal
Polymer
0032-3861
Publisher
Elsevier
Publication Date
Volume
27
Issue
5
Identifiers
DOI: 10.1016/0032-3861(86)90133-3
Keywords
  • Laser Light Scattering
  • Complexing Solvent
  • Aggregation Process
  • Stereocomplex
  • Syndiotactic Length Sequence
  • Second Virial Coefficient
  • Radius Of Gyration

Abstract

Abstract The behaviour of mixtures of iso- and syndiotactic poly(methyl methacrylate) (PMMA) as a function of time and polymer whole concentration in several solvents has been studied by light scattering and laser light scattering. The different solvents investigated in this study are acetonitrile, ethyl acetate, dimethylformamide (DMF), tetrahydrofuran (THF) and 1,4-dioxane. We have found that the last one behaves as a weakly complexing solvent, while the others show a complexing power decreasing from acetonitrile to THF. An increase in polymer whole concentration induces a higher aggregation of the macromolecular coil, while the compaction process of stereocomplex particles is not strongly influenced. The influence of time in stereocomplex behaviour depends on the nature of the solvent employed. In strongly complexing solvents there is initially a strong increase in the aggregation process and a decrease in compaction. However, in weakly complexing solvents these kinetic processes are less important.

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