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Preparation and Characterization of Anisotropic Submicron Particles From Semicrystalline Polymers

✍ Scribed by Roland H. Staff; Ingo Lieberwirth; Katharina Landfester; Daniel Crespy

Publisher
John Wiley and Sons
Year
2012
Tongue
English
Weight
791 KB
Volume
213
Category
Article
ISSN
1022-1352

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✦ Synopsis

Abstract

The synthesis of colloidally stable submicron particles of syndiotactic polystyrene (sPS) and isotactic polystyrene (iPS) is reported. Model particles based on poly‐L‐lactic acid (PLLA), atactic polystyrene (aPS), sPS, and iPS are prepared by the evaporation of a solvent present in miniemulsion droplets. The degree of crystallinity of the particles is found to decrease with their size, as shown by DSC and WAXS measurements. Remarkably, nonspherical particles can be formed in the dispersed state with sPS and iPS, whereas PLLA and aPS particles always display spherical morphologies.

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