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Coupling of gelation and glass transition in a biphasic colloidal mixture—from gel-to-defective gel-to-glass
The
state transition from gel to glass is studied in a biphasic mixture of
polystyrene core/poly (N-isopropylacrylamide)
shell (CS) microgels and sulfonated polystyrene (PSS) particles. At 35 °C, the
interaction between CS is due to short-range Van der Waals attraction, while
that between PSS is from long-range electrostatic repulsion. During variation
of the relative ratio of the two species at ...
http://www.polymer.cn//ss/chengheiccas/publicationsshow_8595.html |
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Well-defined high refractive index poly(monothiocarbonate) with tunable Abbe''s numbers and glass-transition temperatures via terpolymerization
The synthesis of thermoplastics with high refractive index (n) and high Abbe’s number (Vd) is rarely reported. This work describes well-controlled synthesis of a soluble poly(monothiocarbonate) with high n and Vd values by using carbonyl sulfide (COS) as sulfur resource. The alternating COS/cyclohexene oxide (CHO)/propylene oxide (PO) terpolymerization was well performed by using...
http://www.polymer.cn//ss/xhzhang/publicationsshow_8493.html |
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Fluorescence responsive conjugated poly(tetraphenylethene) and its morphological transition from micelle to vesicle
A crown ether-functionalized poly(tetraphenylethene) (AP-TPE) is synthesized and the rotation of the TPE group is successfully restricted via the complexation of crown ether and organic ammonium salts, leading to stepwise enhanced fluorescence accompanied with a morphological transition from micellar to vesicular.
http://www.polymer.cn//ss/buwf/publicationsshow_8198.html |
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Temperature-Responsive Phase Transition of Polymer Vesicles: Real-Time Morphology Observation and Molecular Mechanism
Novel thermosensitive polymer vesicles with controlled temperature-responsive phase transition at the lower critical solution temperature (LCST) varying from 8 to 81 °C were prepared via self-assembly of amphiphilic hyperbranched star copolymers having a hydrophobic hyperbranched poly[3-ethyl-3-(hydroxymethyl)oxetane] (HBPO) core and many hydrophilic polyethylene oxide (PEO) arms. Real-time optic...
http://www.polymer.cn//ss/zhouyongfeng/publicationsshow_8030.html |
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Studies on Synthesis of Water-Soluble Polymer-supported Transition Metal Polypyridyl Complexes and their interaction with DNA
Five water-soluble polymer-supported transition metal
polypyridyl complexes were synthesized from polyacrylic acid -co-
N-vinyl pyrrolidone, 2-methyl-3-hydroxyl benzaldehyde, o-phenanthroline and
metal acetate salts. Infrared spectra (IR), thermo-gravimetric and differential
thermal analysis (TG-DTA), Inductance Coupling Plasma (ICP) and X-ray
photoelectron spectroscopy (XPS) measurement technolog...
http://www.polymer.cn//ss/zhangfaai/publicationsshow_7803.html |
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Colloidal particles with various glass transition temperatures: preparation, assembly, and the properties of stop bands under heat treatment
Monodisperse P(St-co-nBA-co-AA) colloidal microspheres with various glass transition temperatures (T gs), whose average particle sizes were about 300 nm, were prepared using soap-free emulsion polymerization by adjusting the ratio of styrene and n-butyl acrylate. Colloidal photonic crystals were assembled with these microspheres by vertical deposition method. Stop bands of colloid...
http://www.polymer.cn//ss/zhangqiuyu/publicationsshow_7794.html |
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Langmuir--Temperature-Driven Switching of the Catalytic Activity of Artificial Glutathione Peroxidase by the Shape Transition between the Nanotubes and Vesicle-like Structures
Smart supramolecular nanoenzymes with temperature-driven switching property have been successfully constructed by the self-assembly of supra-amphiphiles formed by the cyclodextrin-based host–guest chemistry. The self-assembled nanostructures were catalyst-functionalized and thermosensitively-functionalized through conveniently linking the catalytic center of glutathione peroxidase and thermosen...
http://www.polymer.cn//ss/dongzy/publicationsshow_7694.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.cn//ss/cenglxl/publicationsshow_7530.html |
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UNIFORM TO ACCELERATED CRYSTAL TWISTING TRANSITION IN DEUTERATE POLYETHYLENE/POLY (ETHYLENE-ALT-PROPYLENE) BLEND FILM
A uniform to accelerated crystal
twisting transition is observed in deuterate polyethylene/poly(ethylene-alt-propylene) (d-PE/PEP) blend film. And
the band period is a function of initial d-PE concentration, quench depth and
annealing time of phase separation. As Keith and Padden suggested, twisting of
lamella is due to the unbalanced stress on its both sides, which can supply a
satisfying explana...
http://www.polymer.cn//ss/chengheiccas/publicationsshow_7144.html |
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Polymer brushes: A controllable system with adjustable glass transition temperature of fragile glass formers
http://scitation.aip.org/content/aip/journal/jcp/140/4/10.1063/1.4862234
http://www.polymer.cn//ss/luzhongyuan/publicationsshow_6922.html |
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