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Study of the Kinetics of the Pancake-to-Brush Transition of Poly(N-isopropylacrylamide) Chains
关键字：pancake, brush, pnipam, qcm
The chemical grafting of thiol-terminated poly(N-isopropylacrylamide) (HS-PNIPAM) chains to a gold surface from a solution was investigated with a quartz crystal microbalance (QCM) in real time. The frequency and energy dissipation responses revealed that short HS-PNIPAM chains exhibit three-regime kinetics of the grafting. In regimes I and II, the HS-PNIPAM chains form pancake an...
http://www.polymer.cn/research/sy_info15847 |
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Collapse and Swelling of Poly(N-isopropylacrylamide-co-sodium acrylate) Copolymer Brushes Grafted on a Flat SiO2 Surface
关键字：pnipam brush, qcm
Poly(N-isopropylacrylamide-co-sodium acrylate) copolymer brushes grafted on SiO2-coated quartz crystal surface were prepared with a surface-immobilized initiator. The collapse and swelling of the thermally sensitive copolymer brushes in water were studied with quartz crystal microbalance in situ. The frequency and dissipation changes with the temperature increasing in the ran...
http://www.polymer.cn/research/sy_info15846 |
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LLS and FTIR Studies on the Hysteresis in Association and Dissociation of Poly(N-isopropylacrylamide) Chains in Water
关键字：interchain, intrachain, hydrogen bonding, hysteresis
Using a combination of static and dynamic laser scattering, we examined the association and dissociation of linear poly(N-isopropylacrylamide) (PNIPAM) chains in dilute aqueous solutions. There exists a hysteresis in the temperature dependence of the average hydrodynamic radius (áRh?), average radius of gyration (áRg?), and apparent weight-average molar mass (Mw,app) in one heat...
http://www.polymer.cn/research/sy_info15845 |
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Novel magnetic chitosan/poly (vinyl alcohol) hydrogel beads: Preparation, characterization and application for adsorption of dye from aqueous solution
关键字：chitosan
[2011 Impact factor: 4.980, Journal ERA ranking: A]
www.sciencedirect.com/science/article/pii/S0960852411016683
http://www.polymer.cn/research/sy_info15798 |
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Recent Advances in Online Hybrid Yarns for Thermoplastic GF Composites
关键字：Thermoplastics, Online hybrid yarns, Polyamide, Polypropylene, Poly(lactic acid)
Online hybrid yarns were spun with three different polymeric matrices. Depending on the matrix, tailored sizings were applied and the resulting mechanical performances of unidirectional composites were evaluated. Depending on ...
http://www.polymer.cn/research/sy_info15204 |
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High Temperature Applications Poly (lactic acid) Compound : The Design of Experiment
关键字：Design of experiment, Thermal properties, Polymer compound and bioplastics
Poly (lactic acid) was modified via silane moisture crosslinking reaction to improve the thermal properties. The PLA compound ingredient consisted of gamma-aminopropyltriethoxysilane (APS) as crosslinki...
http://www.polymer.cn/research/sy_info15145 |
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High Temperature Applications Poly (lactic acid) Compound : The Design of Experiment
关键字：Design of experiment, Thermal properties, Polymer compound and bioplastics
Poly (lactic acid) was modified via silane moisture crosslinking reaction to improve the thermal properties. The PLA compound ingredient consisted of gamma-aminopropyltriethoxysilane (APS) as crosslinki...
http://www.polymer.cn/research/sy_info15144 |
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Temperature-sensitivity and Cell Biocompatibility of Nanocomposite Hydrogels Incorporated with Biodegradable PHBV
关键字：hydrogels, poly(N-isopropylacrylamide)
The structure, morphology, thermal behaviors and cytotoxicity of novel hydrogels, composed of poly(N-isopropylacrylamide)(PNIPAM) and biodegradable polyester poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) under nanoclay hectorite “Laponite XLG” severed as physical cross-linker, were characterized by X-ray diffraction, scanning electron microscopy, gravimetric method, differential scanning c...
http://www.polymer.cn/research/sy_info14929 |
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Full α to β crystal form transitions in meltcrystallized poly(vinylidene fluoride) (PVDF) induced by ionic liquid modified carbon nanotubes
The impacts of pristine multi-walled carbon nanotubes (MWCNTs), an ionic liquid (IL),1-butyl-3-methylimidazolium hexafluorophosphate [BMIM][PF6], and the ionic liquid modified MWCNTs(IL-MWCNTs) on the crystallization behaviors of melt-crystallized poly(vinylidene f...
http://www.polymer.cn/research/sy_info14771 |
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Study on chain orientation behavior of poly(glycolic acid) / halloysite hybrid electrospun fibers
Recently, clay mineral based nanotubes attracted a great deal of attention, because they possess theadvantages of both nanotubes and clay minerals, which are nature friendly and abundant.1Halloysite is animportant commercialized clay nanotube&nb...
http://www.polymer.cn/research/sy_info14770 |
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