Premium
Preparation and Characterization of Anisotropic Submicron Particles From Semicrystalline Polymers
Author(s) -
Staff Roland H.,
Lieberwirth Ingo,
Landfester Katharina,
Crespy Daniel
Publication year - 2012
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/macp.201100529
Subject(s) - miniemulsion , crystallinity , polystyrene , tacticity , materials science , polymer chemistry , polymer , chemical engineering , evaporation , characterization (materials science) , solvent , polymer science , composite material , nanotechnology , organic chemistry , chemistry , polymerization , physics , engineering , thermodynamics
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.