1. Emulsifier-free emulsion polymerization of acrylonitrile in the presence of poly(methyl methacrylate) seed particles: Influence of the addition mode on the surface morphology
- Author
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Yang Junhe, Xu Risheng, Ling Li-cheng, Yang Guangzhi, Wang Xia, Jia Runping, and Liu Yang
- Subjects
chemistry.chemical_classification ,Materials science ,Polymers and Plastics ,Radical polymerization ,technology, industry, and agriculture ,Polyacrylonitrile ,Emulsion polymerization ,macromolecular substances ,General Chemistry ,Polymer ,Poly(methyl methacrylate) ,Surfaces, Coatings and Films ,chemistry.chemical_compound ,chemistry ,Polymerization ,Chemical engineering ,visual_art ,Polymer chemistry ,Materials Chemistry ,visual_art.visual_art_medium ,Methyl methacrylate ,Acrylonitrile - Abstract
Acrylonitrile (AN) was polymerized in the presence of poly(methyl methacrylate) (PMMA) seed latex by both the batch and dropwise addition modes. The two addition modes both led to PMMA/polyacrylonitrile (PAN) composite particles with a core/shell structure with PMMA as the core and PAN as the shell. The shell thickness could be adjusted by a change in the amount of the second-stage AN monomer relative to the PMMA seed polymer. However, the surface morphologies of the composite polymers were quite different, which showed a rambutan-like batch mode and an urchinlike dropwise mode. The reason was considered as the different precipitation mechanisms of PAN small-particle precipitation for the batch mode and linear PAN segment growth for the dropwise mode. © 2008 Wiley Periodicals, Inc. J Appl Polym Sci, 2009
- Published
- 2009
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