Electrorheological properties of PMMA-b-PSt copolymer suspensions
JOURNAL OF COLLOID AND INTERFACE SCIENCE, cilt.293, sa.2, ss.489-495, 2006 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 293 Sayı: 2
- Basım Tarihi: 2006
- Doi Numarası: 10.1016/j.jcis.2005.06.078
- Dergi Adı: JOURNAL OF COLLOID AND INTERFACE SCIENCE
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
- Sayfa Sayıları: ss.489-495
- Gazi Üniversitesi Adresli: Evet
Özet
In this study, a block copolymer of methyl methacrylate (MMA) and styrene (St) synthesized by combined ultrasonic irradiation and reverse atom transfer radical polymerization (RATRP) processes was used. PMMA-b-PSt was partially hydrolyzed and converted to a lithium salt, PMMA-b-PSt-Li, before the electrotheological (ER) measurements carried out. Average particle diameter of PMMA-b-PSt-Li polymeric salt was determined by dynamic light scattering (DLS) as 22 mu m. Suspensions of PMMA-b-PSt-Li polymeric salts were prepared in silicone oil. ER properties of PMMA-b-PSt-Li/silicone oil suspensions were studied as a function of electric field strength, dispersed phase concentration, shear rate, shear stress, temperature, frequency, and polar promoter. Further dielectric properties of PMMA-b-PSt-Li ionomer were also investigated. (c) 2005 Elsevier Inc. All rights reserved.