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Review:Aggregation-Induced Emission——A New Tool to Study Polymer Thermodynamics and Kinetics
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作者 Yifan Ge Xiaoxiao Yu +3 位作者 Junyan Zhang Lan Zhou Yanhua Cheng Meifang Zhu 《Journal of Harbin Institute of Technology(New Series)》 CAS 2022年第6期89-100,共12页
Polymer thermodynamics and kinetics are important components in the basic theory of polymer physics, which provide critical support for polymer processing and molding. As an important thermal analysis technology, diff... Polymer thermodynamics and kinetics are important components in the basic theory of polymer physics, which provide critical support for polymer processing and molding. As an important thermal analysis technology, differential scanning calorimetry(DSC) is a key way to explore the molecular motion of polymer chains, molecular structure, and condensed structure, greatly promoting the development of polymer materials. However, this technique is limited by its ambiguous results, because of inaccurate heat flow measurement and high parameter dependence. As an alternative strategy, aggregation-induced emission luminogens(AIEgens) have been extensively applied in various targets analysis and process monitoring, owing to their weak intermolecular interactions and highly twisted conformation. The optical properties of AIEgens are highly sensitive to the variations of the polymer microenvironment, including characteristic transition, crosslinking reaction, crystallization behavior, and phase separation. In this review, the progress of AIE technology in visualizing polymer molecular motion and structure evolution is summarized, compensating for the limitation of the traditional DSC method to facilitate further research in polymer science and engineering. 展开更多
关键词 aggregation-induced emission THERMODYNAMICS KINETICS polymer physics VISUALIZATION
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Physical Diffusion and Electron-transfer Dynamics of Electroactive Solutes in Polymer Electrolytes Ⅲ. Effect of the Polymer Solvents 被引量:2
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作者 Li Ming DING Zhong SHI Hua Fang ZHOU and Shao Jun DONG(Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022) 《Chinese Chemical Letters》 SCIE CAS CSCD 1997年第10期901-904,共4页
The diffusion coefficients(Dapp) and the heterogeneous electron transfer rate constants(ks)for ferrocene in several polymer solvents were determined by using steady-stae voltammetry. Thetemperature dependence of the t... The diffusion coefficients(Dapp) and the heterogeneous electron transfer rate constants(ks)for ferrocene in several polymer solvents were determined by using steady-stae voltammetry. Thetemperature dependence of the two parameters indicates Arrhenius behavior. The polymer solventeffects on diffusion and electron transfer dynamics of ferrocene were discussed 展开更多
关键词 MPEG Effect of the polymer Solvents Physical Diffusion and Electron-transfer Dynamics of Electroactive Solutes in polymer Electrolytes
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Effect of Poly(Ether Urethane) Introduction on the Performance of Polymer Electrolyte for All-Solid-State Dye-Sensitized Solar Cells
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作者 周艳方 向万春 +4 位作者 方世璧 陈申 周晓文 张敬波 林原 《Chinese Physics Letters》 SCIE CAS CSCD 2009年第12期240-242,共3页
The introduction of poly(ether urethane) (PEUR) into polymer electrolyte based on poly(ethylene oxide), LiI and I2, has significantly increased the ionic conductivity by nearly two orders of magnitudes. An incre... The introduction of poly(ether urethane) (PEUR) into polymer electrolyte based on poly(ethylene oxide), LiI and I2, has significantly increased the ionic conductivity by nearly two orders of magnitudes. An increment of I3- diffusion coefficient is also observed. All-solid-state dye-sensitized solar cells are constructed using the polymer electrolytes. It was found that PEUR incorporation has a beneficial effect on the enhancement of open circuit voltage VOC by shifting the band edge of TiO2 to a negative value. Scanningelectron microscope images indicate the perfect interfacial contact between the TiO2 electrode and the blend electrolyte. 展开更多
关键词 Soft matter liquids and polymers Electronics and devices Biological physics Condensed matter: structural mechanical & thermal Chemical physics and physical chemistry
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Physical Diffusion and Electron-transfer Dynamics of Electroactive Solutes in Polymer Electrolytes Ⅰ. Effect of the Nature of Electroactive Solutes
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作者 Li Ming DING Hua Fang ZHOU Zhong SHI and Shao Jun DONG(Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022) 《Chinese Chemical Letters》 SCIE CAS CSCD 1997年第9期825-828,共4页
The diffusion coefficients(Dapp) and the heterogeneous electron-transfer rate constants(ks)for ferrocene and its seven derivatives in MPEG/LiClO4 electrolyte were determined by using steadystate voltammetry. The two p... The diffusion coefficients(Dapp) and the heterogeneous electron-transfer rate constants(ks)for ferrocene and its seven derivatives in MPEG/LiClO4 electrolyte were determined by using steadystate voltammetry. The two parameters increase with increasing temperature, indicating Arrhenius behavior. The effects of the nature of electroactive solute molecules on Dapp, ks, and the half-wave potentials(E1/2) are discussed. 展开更多
关键词 NATURE Physical Diffusion and Electron-transfer Dynamics of Electroactive Solutes in polymer Electrolytes Effect of the Nature of Electroactive Solutes
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Physical Diffusion and Electron-transfer Dynamics of Electroactive Solutes in Polymer Electrolytes Ⅱ. Effect of the Ionic Size of Supporting Electrolytes
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作者 Li Ming DING Hua Fang ZHOU Zhong SHI and Shao Jun DONG(Changchun Institute of Applied Chemistry, Chinese Academy of Sciences. Changchun 130022) 《Chinese Chemical Letters》 SCIE CAS CSCD 1997年第10期897-900,共4页
The ditheion coefficients(Dapp) and the heterogeneous electron-transfer rate constan(ks)for ferrocene in MPEG/salt electrolytes were determined by using Steady-stae voltammetry. The temperature dependence of the two p... The ditheion coefficients(Dapp) and the heterogeneous electron-transfer rate constan(ks)for ferrocene in MPEG/salt electrolytes were determined by using Steady-stae voltammetry. The temperature dependence of the two parameters obeys the Arrhenius equstion. The effect of the ionic size of sir supporting electrolytes on diffusion and electron transfer dynamics of fermcene was discussed 展开更多
关键词 Effect of the Ionic Size of Supporting Electrolytes Physical Diffusion and Electron-transfer Dynamics of Electroactive Solutes in polymer Electrolytes MPEG
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Thin Film Flow of a Second Grade Fluid over a Stretching/Shrinking Sheet with Variable Temperature-Dependent Viscosity 被引量:3
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作者 S. Nadeem Naeem Faraz 《Chinese Physics Letters》 SCIE CAS CSCD 2010年第3期212-215,共4页
Effects of variable viscosity on the flow and heat transfer in a thin film on a horizontal porous stretching sheet are analyzed. The steady boundary layer equations for momentum and thermal energy are simplified by us... Effects of variable viscosity on the flow and heat transfer in a thin film on a horizontal porous stretching sheet are analyzed. The steady boundary layer equations for momentum and thermal energy are simplified by using similarity transformations. The resulted and coupled nonlinear differential equations are solved by Homotopy analysis method. The results are presented graphically to interpret various physical parameters appearing in the problem. 展开更多
关键词 Soft matter liquids and polymers Fluid dynamics Mathematical physics
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Using Gamma-Radiation for Drug Releasing from MWNT Vehicle 被引量:1
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作者 李俊 孙浩 戴耀东 《Chinese Physics Letters》 SCIE CAS CSCD 2010年第3期297-299,共3页
A drug delivery system via multi-walled carbon nanotube (MWNT) vehicle was synthesized in aqueous solution. MWNTs were first noncovalently functionalized with chitosan oligomers (CS) with a molecule weight of 4000... A drug delivery system via multi-walled carbon nanotube (MWNT) vehicle was synthesized in aqueous solution. MWNTs were first noncovalently functionalized with chitosan oligomers (CS) with a molecule weight of 4000-6000, making MWNTs water-soluble, and then a cancer ancillary drug tea polyphenols (TP) was conjugated mainly via the hydrogen bond between CS and TP molecules, making MWNTs efficient vehicle for drug delivering. The release of drug molecules can be realized by pH variation and γ-radiation, leading to new methods for controlling drug release from carbon nanotubes carrier. Due to the high penetrability of γ-rays, γ-radiation shows up new opportunities in controlled drug release, possibly facilitating the future cancer treatment in vivo. 展开更多
关键词 Soft matter liquids and polymers Atomic and molecular physics Fluid dynamics Medical physics Biological physics
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Further Discussion on Polaron Existence in Dry DNA
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作者 李晓红 张瑜瑜 +1 位作者 王涛 汪克林 《Chinese Physics Letters》 SCIE CAS CSCD 2009年第12期250-252,共3页
We study the interaction between holes and molecular vibrations on dry DNA by using the extended Firsov's model. The ground state energy, calculated by using two Hilbert spaces, Fock state space and coherent state sp... We study the interaction between holes and molecular vibrations on dry DNA by using the extended Firsov's model. The ground state energy, calculated by using two Hilbert spaces, Fock state space and coherent state space, is confirmed. The polaron binding energy, defined with the ground state energy, is 0.014eV, much less than the thermal energy 0.026eV at room temperature 300K, which means that polarons are difficult to form self-trapping at room temperature and Anderson localization will prevent a metallic state on dry DNA. The results are consistent with the available experiments. 展开更多
关键词 Soft matter liquids and polymers Atomic and molecular physics Biological physics
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A Quasi-One-Dimensional Model for a Chain of Water Molecules on the Nanometer Scale
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作者 吴可非 万荣正 +2 位作者 王春雷 任秀平 方海平 《Chinese Physics Letters》 SCIE CAS CSCD 2010年第3期192-195,共4页
Water confined into the interior channels of narrow carbon nanotubes or transmembrane proteins can form collectively oriented molecular chains held together by tight hydrogen bonds. We develop a quasi-one-dimensional ... Water confined into the interior channels of narrow carbon nanotubes or transmembrane proteins can form collectively oriented molecular chains held together by tight hydrogen bonds. We develop a quasi-one-dimensional model for a chain of water molecules which interact with each other via the Coulomb and power-like repulsive interactions. We explore the equilibrium property of the water chain and derive an exact analytical expression for the total interaction energy of the water chain, denoted by W(0)int. It is found that W(0)int is minimal when the distance between the two neighboring water molecules in a hydrogen-bonded chain is equal to 0.265 nm. The model is expected to be useful for studying analytically the properties of single-file water molecules inside water channels, such as the concerted motion of water molecules. 展开更多
关键词 Soft matter liquids and polymers Atomic and molecular physics Biological physics
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Molecular Simulations in Macromolecular Science 被引量:2
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作者 Duo Xu Hai-Xiao Wan +2 位作者 Xue-Rong Yao Juan Li Li-Tang Yan 《Chinese Journal of Polymer Science》 SCIE EI CAS CSCD 2023年第9期1361-1370,I0005,共11页
Molecular simulations are now an essential part of modern chemistry and physics,especially for the investigation of macromolecules.They have evolved into mature approaches that can be used effectively to understand th... Molecular simulations are now an essential part of modern chemistry and physics,especially for the investigation of macromolecules.They have evolved into mature approaches that can be used effectively to understand the structure-to-property relationships of diverse macromolecular systems.In this article,we provide a tutorial on molecular simulations,focusing on the technical and practical aspects.Several prominent and classical simulation methods and software are introduced.The applications of molecular simulations in various directions of macromolecular science are thenfeatured by representative systems,including self-assembly,crystallization,chemical reaction,and some typical non-equilibrium systems.This tutorial paper provides a useful overview of molecular simulations in the rapid progress of macromolecular science,and suggests guidance for researchers who start exploiting molecular simulations in their study. 展开更多
关键词 Molecular simulation Coarse-grained molecular dynamics Multi-scale method polymer physics
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