title: Self-assembly of well-defined polyacrylamide-polystyrene copolymer on fibrillar clays via ultrasonic-assisted surface-initiated atom transfer radical polymerization.
abstract: Well-defined polyacrylamide-polystyrene copolymers were grafted from the fibrillar clay, attapulgite, by a four-step self-assembly process: (i) the gamma-aminopropyltriethoxyl silane was self-assembled onto the surfaces of the attapulgite; (ii) the surface amino groups were amidated with bromoacetylbromide; (iii) the bromo-acetamide modified attapulgite was used as macro-initiator for the surface-initiated atom transfer radical polymerization of styrene with the catalyst of the complex of 1,10-phenanthroline and Cu(I)Br; (iv) the polystyrene grafted attapulgite was then used as macroinitiator for the polymerization of acrylamide. The two steps of the surface-initiated atom transfer radical polymerizations were all conducted under ultrasonic irradiation at room temperature. The product, polyacrylamide-polystyrene copolymers grafted attapulgite, had been characterized with elemental analysis, Fourier transform infrared spectroscopy, Thermogravimetric analysis (TGA), X-ray photoelectron spectroscopy, X-ray diffractometry, and transmission electron microscopy.
authors.affiliation: Institute of Polymer Science and Engineering, College of Chemistry and Chemical Engineering, Lanzhou University, Gansu 730000, PR China.
authors.forename: Peng
authors.initials: P
authors.lastname: Liu
authors.forename: Tingmei
authors.initials: T
authors.lastname: Wang
authors.forename: Zhixing
authors.initials: Z
authors.lastname: Su
mesh_terms: D000180:Acrylic Resins / Q000737:chemistry*; D000538:Aluminum Silicates / Q000737:chemistry*; D000077215:Clay; D005609:Free Radicals / Q000737:chemistry; D017616:Magnesium Compounds / Q000737:chemistry; D008854:Microscopy, Electron; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure; D036103:Nanotechnology / Q000379:methods; D011137:Polystyrenes / Q000737:chemistry*; D017655:Silicon Compounds / Q000737:chemistry; D017550:Spectroscopy, Fourier Transform Infrared; D013057:Spectrum Analysis; D013499:Surface Properties; D013818:Thermogravimetry; D014465:Ultrasonics; D014961:X-Ray Diffraction; D014965:X-Rays; D000099166:Polyacrylamides
chemical_list: D000180:Acrylic Resins; D000538:Aluminum Silicates; D000077215:Clay; D005609:Free Radicals; D017616:Magnesium Compounds; D011137:Polystyrenes; D017655:Silicon Compounds; D000099166:Polyacrylamides; C026325:attapulgite