Structural characterisation and thermal properties of exfoliated syndiotactic polystyrene grafted atactic polystyrene/Mg-Al layered double hydroxide nanocomposites prepared via solution intercalation
- سال انتشار: 1388
- محل انتشار: سومین کنفرانس نانوساختارها
- کد COI اختصاصی: CNS03_021
- زبان مقاله: انگلیسی
- تعداد مشاهده: 1995
نویسندگان
Lab of polymer, Faculty of chemistry, Payame noor University, Tabriz, Iran
Lab of polymer, Faculty of chemistry, Payame noor University, Tabriz, Iran
Department of Applied Chemistry, Faculty of Chemistry, University of Tabriz, Tabriz, Iran.
چکیده
LDHs are anionic clays whose structure is lamellar. They are constituted by pairs of octahedral divalent and trivalent cations. MgAl(Cl) LDH precursor was prepared by a mixed solution of MgCl2 6H2O (0.75 M) and AlCl3 6H2O (0.25 M) was slowly pumped into decarbonated water under flowing N2 with vigorous stirring at a constant pH of 8.0-8.2 adjusted by simultaneous drop-wise addition of NaOH solution. The synthesized LDHs were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and Fourier transform-infrared (FTIR). The surfactantmodified MgAl(SDBS) was obtained by the anion exchange reaction of MgAl (Cl) LDH with Sodium dodecyl benzene sulfate (SDBS) at 60 oC for 40 h. The PS/Mg-Al LDH nanocomposites were prepared by the solution intercalation method. A desired amount of Mg-Al(SDBS) was firstly refluxed in xylene under flowing N2. Then the copolymer was added into the Mg-Al (SDBS) suspension. After stirring for 3 h at 140 OC, the mixture was poured into ethanol for rapid precipitation.کلیدواژه ها
syndiotactic polystyrene, living free radical polymerization, atactic polystyrene, layered double hydroxides (LDH), microwave irradiation, surface modified, nanocompositeمقالات مرتبط جدید
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