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In the present manuscript, we have demonstrated a new two-layer nano-composite membrane consisting pH-responsive nanoporous layer and a microporous membrane supporting layer. The nanoporous layer was a ca.30 nm thick film with cylindrical pores of diameter 30–50 nm, prepared by the polystyrene-block-poly(4-vinyl pyridine) copolymer (PS-b-P4VP) film. After spin-coating on silicon, this film was immersed...
Styrene-type monomer 9-(4-vinylbenzyl)-9H-carbazole (VBCz) and methacrylate-type monomer 2-(9H-carbazole-9-yl)-ethyl methacrylate (CzEMA) were polymerized to star polymers respectively via atom transfer radical polymerization (ATRP) using zinc 5,10,15,20-tetrakis(4-(2-methyl-2-bromopropoxy) phenyl) porphyrin as an initiator. The emission spectra of two star polymers (star poly(VBCz) and star poly(CzEMA))...
A series of soluble polyacrylates containing different azobenzene side chains have been synthesized via atom transfer radical polymerization (ATRP) technique, from which the side-chain nonlinear optical (NLO) polymers with controllable molecular weight and low polydispersity (1.1–1.4) have been obtained. The third-order NLO absorption and refraction coefficients were simultaneously determined by Z-scan...
Fabrication of honeycomb-patterned films from one of the soluble fluoro-polyimides in a humid atmosphere was reported in this paper. This polyimide was synthesized from 2,2′-bis(3,4-dicarboxyphenyl)hexafluoropropane dianhydride (6FDA) and 4,4′-methylene dianiline (MDA) by two-step method. The obtained polyimide kept excellent rigidity and thermal stability, and especially, exhibited good solubility...
Functionalized polystyrene (PSt) was synthesized utilizing atom transfer radical polymerization (ATRP), which was conducted by using 2-(4-chloromethyl-phenyl)-benzoxazole (CMPB) as initiator, CuCl/PMDETA as catalyst, and cyclohexanone as solvent. The mechanism of ATRP was proved by characterizing the structure of PSt via 1 H NMR and preparing of PSt-b-PMMA block copolymer. The polymerization...
Polypropylene (PP)/org-attapulgite (ATP) nanocomposites were prepared by melt blending in a mixer apparatus. Org-attapulgite was attained by silane coupling agent modification first and then graft-polymerization with butyl acrylate. Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) were used to assess the clay morphology and the dispersion of the org-attapulgite, respectively...
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