Synthesis of latices with hydrophobic cores and poly(vinyl acetate) shells. 2. Use of poly(vinyl acetate) seeds

Ferguson, Christopher J., Russell, Gregory T. and Gilbert, Robert G. (2003) Synthesis of latices with hydrophobic cores and poly(vinyl acetate) shells. 2. Use of poly(vinyl acetate) seeds. Polymer, 44 9: 2607-2619. doi:10.1016/S0032-3861(03)00155-1


Author Ferguson, Christopher J.
Russell, Gregory T.
Gilbert, Robert G.
Title Synthesis of latices with hydrophobic cores and poly(vinyl acetate) shells. 2. Use of poly(vinyl acetate) seeds
Journal name Polymer   Check publisher's open access policy
ISSN 0032-3861
1873-2291
1089-3156
Publication date 2003-04
Sub-type Article (original research)
DOI 10.1016/S0032-3861(03)00155-1
Volume 44
Issue 9
Start page 2607
End page 2619
Total pages 13
Place of publication London, U.K.
Publisher Elsevier
Language eng
Subject 030399 Macromolecular and Materials Chemistry not elsewhere classified
03 Chemical Sciences
Abstract A strategy is explored for synthesizing latex particles with polystyrene cores and poly(vinyl acetate) shells. The seed particles are poly(vinyl acetate), which theory indicates should be immune to secondary particle formation when a second-stage seeded emulsion polymerization with styrene is carried out. The objective is to form a single hydrophobic core by inversion of the second and first stages. While this morphology is favoured thermodynamically, conditions need to be optimized so that it is kinetically achievable: many attempts to implement this using straightforward synthetic procedures result in either no core (acorn morphology) or multiple polystyrene cores. A series of experiments enables this goal to be implemented by ensuring sufficiently fast diffusion of the first-stage hydrophilic polymer (using chain-transfer agent to reduce the molecular weight and, more importantly, the degree of branching of the parent poly(vinyl acetate) seed polymer), an initiator which minimized grafting between the first- and second-stage polymers, and modifying the seed poly(vinyl acetate) to increase its hydrophilicity.
Keyword Emulsion Polymerization
Inverse core-shell
Vinyl acetate
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Unknown

Document type: Journal Article
Sub-type: Article (original research)
Collections: Faculty of Health and Behavioural Sciences -- Publications
Excellence in Research Australia (ERA) - Collection
 
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