A survey was made on the recent development of the mean-field lattice theory of polymer solutions to predict the properties of equilibrium melting points of bulk polymers. The interaction parameters were identified fo...
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A survey was made on the recent development of the mean-field lattice theory of polymer solutions to predict the properties of equilibrium melting points of bulk polymers. The interaction parameters were identified for several real polymers.
A series of composites were fabricated by impregnating the jute nonwoven fabric in acrylonitrile-butadiene (NBR) latex. The effect of different weight ratio (dry to dry basis) of jute and NBR on the biodegradation of ...
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The possibility of forming self-organized films using charge-stabilized dispersions of cellulose I nanofibrils and microgel beads of poly-(N-isopropylacrylamide-co-acrylic acid) copolymer is presented. The build-up be...
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The following article from the Journal of Applied polymerscience , “Palladium (II)—Rare Earth Metal Catalyzed Copolymerization of CO and Styrene in [bmim] + PF 6 − Ionic Liquid” by Jintang Guo, Guang Hu, Shan Gao,...
The following article from the Journal of Applied polymerscience , “Palladium (II)—Rare Earth Metal Catalyzed Copolymerization of CO and Styrene in [bmim] + PF 6 − Ionic Liquid” by Jintang Guo, Guang Hu, Shan Gao, and Peng Li, published online on 14 November 2011 in Wiley Online Library (***), has been retracted by agreement between the authors; the journal's Managing Editor, Stefano Tonzani; and Wiley Periodicals, Inc. The retraction has been agreed due to the inappropriate use of previously published work, in particular Figures 6 and 7.
Poly[2, 6-diimidazo (4,5-b:4’,5’-e) pyridinylene-1,4(2,5-dihydroxy) phenylen] (PIPD) was synthesized and the obtained PIPD/ PPA dope was directly spun into fibers via a dry-jet wet-spinning process for the first tim...
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Poly[2, 6-diimidazo (4,5-b:4’,5’-e) pyridinylene-1,4(2,5-dihydroxy) phenylen] (PIPD) was synthesized and the obtained PIPD/ PPA dope was directly spun into fibers via a dry-jet wet-spinning process for the first time. The obtained polymers were mainly characterized by ATR-FTIR and dynamic contact angle analysis. FTIR spectrum of the PIPD fibers indicates that the product was consistent with the target product. The contact angle measurements show that the wetting process of water on PIPD fibers is apparently faster than that on PBO fibers. The axial compression bending test indicates that PIPD fibers showed larger compressive strength compared with that of PBO fibers under the same axial compressive load. Meanwhile, the TGA test results indicate that the PIPD fibers have excellent thermal stability.
The application of nanotechnology in medicine research has significant potential in modern biomedical research,disease diagnosis and *** fluorophore-based detection techniques have been widely used as imaging and sign...
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The application of nanotechnology in medicine research has significant potential in modern biomedical research,disease diagnosis and *** fluorophore-based detection techniques have been widely used as imaging and signal transduction tools for the detection of trace levels of *** photosensitivity of the fluorophores,however,limits their application in such complex environments as living bio-systems where degradation or photobleaching *** nanoparticles have unique and stable optical,electrical,magnetic and catalytic properties because of their various shapes,sizes and *** potential of the nanoparticles as novel imaging agents has been studied as a possible solution to this *** modification of inorganic nanoparticles could enhance their biostability in physiological conditions and ability of targeting bioactive molecules.
Step-graded InGaP_ySb_(1-y) and In_xGa_(1-x)As metamorphic buffer layer (MBL) structures are grown on GaAs substrates by metal-organic chemical vapor deposition (MOCVD). AFM analysis indicates that graded group V InGa...
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ISBN:
(纸本)9781457717536
Step-graded InGaP_ySb_(1-y) and In_xGa_(1-x)As metamorphic buffer layer (MBL) structures are grown on GaAs substrates by metal-organic chemical vapor deposition (MOCVD). AFM analysis indicates that graded group V InGaP_ySb_(1-y) MBLs exhibit significantly lower surface roughness (～4.7nm) compared with more conventional graded group III In_xGa_(1-x)As MBLs, which typically have rms surface roughness in the range of 7-14nm. To reduce the surface roughness of the In_xGa_(1-x)As MBL, a post growth chemical-Mechanical Polishing (CMP) procedure is implemented. AFM image analysis indicates the CMP process is effective in reducing the step-graded In_xGa_(1-x)As MBL surface roughness from ～7.3 nm (as-grown) to 2.3 nm post CMP. Preliminary studies indicate that bulk InGaAs layers regrown on top of the MBL subjected to CMP exhibit improved static and transient PL characteristics compared with those deposited on as-grown MBLs.
Thermally-induced polymerization of 1,4-diphenyl-1,2,3-butatriene affords poly(1,4-diphenyl- 2-butyne-1,4-diyl) as a soluble high molecular weight material. Structure is characterized by 13C and vibrational spectrosco...
Thermally-induced polymerization of 1,4-diphenyl-1,2,3-butatriene affords poly(1,4-diphenyl- 2-butyne-1,4-diyl) as a soluble high molecular weight material. Structure is characterized by 13C and vibrational spectroscopy. When treated with base, this material rearranges to a soluble red poly(acetylene) with a unique substitution pattern.
This Nano Focus article highlights recent advances in RNA nanotechnology as presented at the First International Conference of RNA Nanotechnology and Therapeutics, which took place in Cleveland, OH, USA (October 23-25...
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We performed Brownian Dynamics simulations of multiblock copolymers of A and B polymers in a solvent selective for the A block at a volume fraction of 20%. Tri-, penta- and heptabocks were simulated. Fourier transform...
We performed Brownian Dynamics simulations of multiblock copolymers of A and B polymers in a solvent selective for the A block at a volume fraction of 20%. Tri-, penta- and heptabocks were simulated. Fourier transformation reveals micellar clusters arranged in a BCC lattice, in agreement with scattering experiments. The clusters were analyzed using a percolation approach and we observed larger clusters when the outermost block was in the poor solvent condition. The ratio of number of loops to bridges decreases as the number of blocks in the copolymer increases, as does the polydispersity. Increased penalty of looping as the number of blocks increases leads to a larger number of smaller clusters with more bridges.
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