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[Macro. Chem. Phys.] Catalytic Precision Polymerization: Rare Earth Metal-Mediated Synthesis of Homopolymers, Block Copolymers, and Polymer Brushes
Recent studies have shown that rare earth metal-mediated group transfer polymerization
(REM-GTP) can be applied to a variety of polar monomers, besides the classic (meth)-
acrylates or (meth)acrylamides, giving access to new polymeric materials. This article
highlights progress in this new fi eld and gives a current overview of the initiation and
propagation of vinylphosphonates, the extension to ...
http://www.polymer.cnt//ss/zhang_ning/publicationsshow_7679.html |
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Spherical Polymer Brushes in Solvents of Variable Quality: An Experimental Insight by TEM Imaging
The spherical micelle and vesicle composed of [PW12O40](3-) and poly(styrene-b-4-vinylpyridinium methyl iodide) are regarded as a model system to study spherical polymer brushes (SPBs) in solvents of various quality. The pure repulsions occur for the brush chains in the chloroform solution and chloroform/methanol mixture with a methanol volume ratio of 9.1%, where the grafted polystyrene chains ...
http://www.polymer.cnt//ss/buwf/publicationsshow_7614.html |
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Preparation of Polymer Microspheres with Reactive Epoxy Group and Amino Groups as Stabilizers for Gold Nanocolloids with Recoverable Catalysis
Narrow disperse poly(divinylbenzene-co-glycidyl
methacrylate) (P(DVB-co-GMA))
microspheres with reactive epoxy group were prepared by distillation
precipitation copolymerization of divinylbenzene (DVB) and glycidyl
methacrylate (GMA) with benzoyl peroxide (BPO) as initiator in neat
acetonitrile. The epoxy group was modified with ethylenediaminie (EDA) for
transferring to amino group, which was use...
http://www.polymer.cnt//ss/yangxinlin/publicationsshow_7575.html |
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Construction of Response Patterns for Metal Cations by Using a Fluorescent Conjugated Polymer Sensor Array from Parallel Combinatorial Synthesis
Pattern-based strategy is an emerging field of interest for effective sensing applications. Seven different conjugated polymers from combinatorial synthesis were combined into a sensor array, and seven metal cations were selected as representative analytes. The response patterns for each cation were constructed by collecting the individual fluorescence responses from seven...
http://www.polymer.cnt//ss/fanlijuan/publicationsshow_7573.html |
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GLASS TRANSITION BEHAVIOR OF THE SPIN-COATED THIN FILMS OF A HYDROPHILIC POLYMER ON THE SUPPORTED SUBSTRATES
Using ellipsometry, we found the glass transition temperature of the spin-coated polyacrylamide (PAL) thin films on the supported silicon (Si) substrates with an oxide layer decreases with decreasing the film thickness. But Tgs of the as-prepared thin films are much higher than that of the bulk sample. Such observations may be attributed to the combined result of the “surface effect” and...
http://www.polymer.cnt//ss/cenglxl/publicationsshow_7530.html |
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[ACS Appl. Mater. Interfaces] Janus Polymer/Carbon Nanotube Hybrid Membranes for Water/Oil Separation
A robust and simple method is provided to fabricate Janus polymer/carbon nanotubes (CNTs) hybrid membranes for oil/water separation. Starting from CNTs membranes formed by dispensing, hydrophobic poly (styrene) (PS) and hydrophilic poly(N, N-dimethylaminoethyl methacrylate) (PDMAEMA) were grated from different sides of the photo active CNTs membranes via self-initiated photografting and photopolym...
http://www.polymer.cnt//ss/chentaogroup/publicationsshow_7526.html |
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Probing polymer surfaces and interfaces using sum frequency generation vibrational spectroscopy- a powerful nonlinear optical technique
Sum frequency generation (SFG) vibrational spectroscopy has been proved to be a powerful technique which substantially impacts on many research areas in surface and interfacial sciences. This paper reviews the recent progress of applying this nonlinear optical technique in the studies of polymer surfaces and interfaces. The theoretical background of SFG is introduced first. Current...
http://www.polymer.cnt//ss/cenglxl/publicationsshow_7488.html |
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Directly Probing Molecular Ordering at the Buried Polymer/Metal Interface 2: Using P-Polarized Input Beams
Previously, we developed several methods to use sum frequency generation (SFG) vibrational spectroscopy to probe buried polymer/metal interfaces in situ by depositing polymer films with different thicknesses on metal surfaces or sandwiching a polymer thin film between a metal surface and a fused silica window. In this study, we developed a new and easier method to directly probe the polymer...
http://www.polymer.cnt//ss/cenglxl/publicationsshow_7476.html |
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Solvent quality affects chain conformational order at the polymer surface revealed by sum frequency generation vibrational spectroscopy
The surface sum frequency generation (SFG) vibrational spectroscopic spectra of PMA and PMMA films prepared from solvents with different qualities were found different. This suggests that the surface molecular structures of PMA and PMMA films were affected by the solvent quality. A simple phenomenological model was used to describe the chain conformational order at the polymer surface by co...
http://www.polymer.cnt//ss/cenglxl/publicationsshow_7471.html |
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Illustrating consistency of different experimental approaches to probe the buried polymer/metal interface using sum frequency generation vibrational spectroscopy
In this paper, we demonstrate our ability to directly probe the molecular structures of the buried polymer/metal interface using sum frequency generation (SFG) vibrational spectroscopy. Spectroscopic data from different experimental approaches were compared and analyzed to deduce the molecular ordering information at a buried polymer/metal interface, i.e. the poly(n-butyl methylacrylate) (P...
http://www.polymer.cnt//ss/cenglxl/publicationsshow_7468.html |
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