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Suspension Polymerization with Hydrophobic Silica as a Stabilizer III. Poly(butyl methacrylate) Composite Particles Containing Carbon Black  

Moon, Ji-Yeon (Department of Polymer Engineering, University of Suwon)
Park, Moon-Soo (Department of Polymer Engineering, University of Suwon)
Publication Information
Polymer(Korea) / v.33, no.5, 2009 , pp. 477-484 More about this Journal
Abstract
Suspension polymerization with hydrophobic silica as a stabilizer and AIBN as an initiator was conducted to synthesize PBMA particles and PBMA composite particles containing carbon black. Surface modification of silica particles by controlling pH revealed that 90% of them functioned as stabilizer and 10% were incorporated into PBMA particles. While stabilizer concentration had no impact on reaction kinetics and particle diameter, an increase in stabilizer concentration displayed an increase in molecular weights when it exceeded 1.67 wt%. An increase in initiator concentration and reaction temperature decreased molecular weights in close agreement with the theoretical equation. An increase in carbon black concentration from 1 to 7 wt%, relative to the monomer, showed a progressive decrease in reaction conversion. As carbon black was increased from 3 to 5 wt%, glass transition showed a $4^{\circ}C$ increase. The presence of carbon black was confirmed by TEM while its concentration was measured by TGA.
Keywords
hydrophobic silica; suspension polymerization; carbon black; poly (butyl methacrylate); polymer composite particles;
Citations & Related Records
Times Cited By KSCI : 4  (Citation Analysis)
Times Cited By Web Of Science : 1  (Related Records In Web of Science)
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