Redox-initiated poly(methyl methacrylate) emulsion polymerizations stabilized with block copolymers based on methoxy-poly(ethylene glycol), ε-caprolactone, and linoleic acid

Share/Save/Bookmark

Tan, BoonHua and Nabuurs, Tijs and Feijen, Jan and Grijpma, Dirk W. (2009) Redox-initiated poly(methyl methacrylate) emulsion polymerizations stabilized with block copolymers based on methoxy-poly(ethylene glycol), ε-caprolactone, and linoleic acid. Journal of Polymer Science, Part A: Polymer chemistry, 47 (17). pp. 4234-4244. ISSN 0887-624X

[img] PDF
Restricted to UT campus only
: Request a copy
150kB
Abstract:A redox initiating system, consisting of t-butyl hydroperoxide (tBHPO), isoascorbic acid (iAA), and ethylenediaminetetraacetic acid ferric-sodium salt (FeEDTA) was employed in emulsion polymerizations of methyl methacrylate (MMA) at high solids contents of 30 wt % in water. The system was stabilized using, linoleic acid (LA)-functionalized and nonfunctionalized surfactants based on methoxy-PEG (MPEG) and ε-caprolactone (CL). To optimize polymerization conditions and to avoid coagulation and solidification during the reaction, the temperature, the amount of initiator, the chemical characteristics of the surfactant, and the surfactant to monomer ratio were varied. MPEO45-CL6.5-LA (the subscripts refer to the average number of repeating monomer units) was found to be the most suitable surfactant, as it performs adequately under suboptimal reaction conditions. In the emulsion polymerization of MMA in water at ∼30 wt %, best results were obtained at a reaction temperature of 60 °C, with an initiator system comprising tBHPO iAA and FeEDTA, and a surfactant to monomer ratio of 10/90 by weight or higher. Under these conditions, stable PMMA latices with average particle sizes of 200–300 nm were obtained at complete monomer conversion.
Item Type:Article
Copyright:© 2009 Wiley
Faculty:
Science and Technology (TNW)
Research Group:
Link to this item:http://purl.utwente.nl/publications/72588
Official URL:http://dx.doi.org/10.1002/pola.23473
Export this item as:BibTeX
EndNote
HTML Citation
Reference Manager

 

Repository Staff Only: item control page

Metis ID: 263351