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http://dx.doi.org/10.7317/pk.2012.36.6.727

Baroplastic Process of PBA/PS/Si Blend Prepared by Heterocoagulation  

Lee, Kwang-Hee (Department of Engineering Chemistry, College of Engineering, Chungbuk National University)
Ryu, Sang-Woog (Department of Engineering Chemistry, College of Engineering, Chungbuk National University)
Publication Information
Polymer(Korea) / v.36, no.6, 2012 , pp. 727-732 More about this Journal
Abstract
Baroplastic poly(butyl acrylate) (PBA)/polystyrene (PS) blends were prepared by mixing PBA and PS emulsions synthesized by cationic and anionic surfactant, respectively. Interestingly, the heterocoagulation of nanoparticles have found to be affected strongly by emulsion concentration but the blends have been prepared with almost same compositions regardless of the amount of reactants. Utilizing this method, PBA/PS/Si hybrid nano-blends were prepared successfully via electrostatic attraction forces between PBA, PS and silica nanoparticles. The hybrid nano-blend having 2 or 5 wt% of silica was then processed to a semi-transparent film at $25^{\circ}C$ under 13.8 MPa for 10 min, which showed 3.0 MPa of tensile strength and 25 MPa of elastic modulus. Therefore, the heterocoagulation technique can be used for preparing baroplastics with uniform compositions of polymer and silica nanoparticles.
Keywords
emulsion; blend; heterocoagulation; baroplastic; silica nanoparticle;
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