最新刊期
卷 19 ， 期 6 ， 2006
- 摘要：This is an annual review on polymer science in mainland of China in 2005.The areas overviewed include synthesis of macromolecules with specific architecture,characterization of structures of polymers,electrical and optical active polymers,real-time membrane fusion or fission of vesicles,polymer self-assembly and super molecular polymers,micro or nano structure and nanocomposites of polymers,bio-medical polymers.关键词：Polymer science;2005 annual review;Progress in mainland of China
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发布时间：2022-09-18 - 摘要：Chiral bis (oxazoline) immobilized on different supports through different strategies serve as versatile catalysts in a variety of asymmetric reactions, behaving good properties of recovery and reuse in some cases .This review summaries the above progress .关键词：Bis (oxazoline);Immobilization;Asymmetric catalysis
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发布时间：2022-09-18 - 摘要：An overview is focused on the development of proton exchange membrane for fuel cells.The structure character and performance of the polyperfluorosulfonic acid membrane,as well as the method on modifying Nafion membrane and the development of new proton exchange membranes are introduced.The structures,preparation, properties of the various types of PEM and their applications in PEMFC or DMFC are also discussed in detail.The potential development in the membrane is also discussed in the end of the article.关键词：Proton exchange membrane;PEMFC;DMFC
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发布时间：2022-09-18 - 摘要：The introduction of phosphorus to improve the flame retardance of epoxy resin systems has been the focus of attention by researchers in recent years.In this paper,the mechanism of the phosphorus-containing flame retardant was simply discussed.The types of flame-retardant epoxy resins containing phosphorus and flame-retardant properties of its cured compounds were demonstrated elaborately.The synergistic effect of phosphorus-nitrogen and phosphorus-silicon on fire resistance was also presented.关键词：Phosphorus;Epoxy resin;Flame retardancy
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发布时间：2022-09-18 - 摘要：Atom transfer radical polymerization (ATRP) is an effective route to synthesize polymers with well-defined structures.Multiblock copolymers synthesized by ATRP in recent ten years are reviewed.The syntheses, properties and potential applications of multiblock copolymers,such as ABA-type,ABC-type,and ABCBA-type,are discussed in terms of monomers,initiators,and polymerization condition.Application of ATRP technology to the synthesis of functional multiblock polymers is predicted.关键词：Atom transfer radical polymerization (ATRP);Multiblock copolymer;ABA-type triblock copolymer;ABC-type triblock copolymer;ABCBA-type pentablock copolymer
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发布时间：2022-09-18 - 摘要：The development of the research on hyperbranched/polycarbosilanes polysiloxysilanes is reviewed .The influence of different conditions on the synthesis of hyperbranched polycarbosilanes/polysiloxysilanes via polyhydrosilylation, nucleophilic substitution reaction and polydehydrocoupling, is primarily discussed .关键词：Hyperbranched polymers;Polysiloxanes;Polycarbosilanes;Polyhydrosilylation;Polydehydrocouple
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发布时间：2022-09-18 - 摘要：Thermosensitive hydrogels are a kind of functional polymer materials with widely potential applications, which is limited due to the slow response rate for conventional hydrogels .Recently many researches have been focused on improving the response rate of hydrogels .This paper reviewed the development of fast response thermosensitive hydrogels in recent years in several aspects :preparation of porous and copolymer hydrogels, synthesis of comb-type grafted hydrogels and submicron hydrogel particles, using silane cross-linking agents, cold-treatment or cold polymerization/crosslinking reaction, and other techniques .Some phenomena of these hydrogels were discussed as well .关键词：Rapid response;Thermosensitive hydrogel;N-isopropylacrylamide
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发布时间：2022-09-18 - 摘要：Alkyl-chitosan, modified chemically by alkyl halide under alkaline condition, is soluble and spontaneously forms nanoparticles about 10-200 nm in diameters by Dynamic light scattering (DLS) .It was found by X-ray photoelectron spectroscopy (XPS) that the alkyl substitution reaction was mainly on amine groups of chitosan . After carrying paclitaxel, the sizes of the particles of alkyl-chitosan were larger than before .In phosphate buffer solution (PBS, pH =7.4), the vitro release rate of paclitaxel from this system was delayed, and the equilibration release concentration of paclitaxel was deceased by the increase of carbon chain length in alkyl substituted chitosan .关键词：Chitosan;Alkyl-chitosan;Nanoparticles;Paclitaxel;Paclitaxel drug delivery
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发布时间：2022-09-18 - 摘要：Hyaluronic acid, a component of the glycosaminoglycans in extracellular matrix, has a special physicochemical properties and influences several cellular functions such as adhesion, migration, and proliferation . The object of this study was to investigate the relationship between the concentrations of hyaluronic acid solutions and the adhesion and proliferation behaviors of human fibroblasts .Hyaluronic acid solutions with different concentrations were added to cell culture medium separately .Results demonstrated that it was only the concentration of hyaluronic acid solutions in a certain range (0.01 %~ 0.1 %), that could promote the cell adhesion, DNA synthesizing, GAG secreting and cell proliferation, while the concentrations of hyaluronic acid solutions were above 0.1 %it would either reduce or even inhibit these behaviors .关键词：Hyaluronic acid;Concentration;Fibroblasts;Adhesion;Proliferation
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发布时间：2022-09-18 - 摘要：This paper reviews the advances in the research of polymers for DNA separation by capillary electrophoresis.The separation ability of these polymers,which has different molecular architecture,such as homopolymers,random copolymers,block copolymers,graft copolymers,quasi-interpenetrating network and sparsely cross-linked "nanogels" polymers are discussed.关键词：Capillary electrophoresis;Microchip-based capillary electrophoresis;DNA separation;DNA sequencing
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发布时间：2022-09-18 - 摘要：Preparation of proton exchange membrane (PEM) using sol-gel method has been reviewed .Up to now, it is an efficient way to prepare the PEMs or optimize membranes by sol-gel .This paper mainly introduces the usage of sol-gel method to prepare the PEM, including types of organic/inorganic hybrid membranes, phosphosilicate gels and modified perfluorosulfuric acid ionic (PFSI) membranes (PFSI) .关键词：Sol-gel;Proton exchange membrane;Hybrid;Nanoparticle
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发布时间：2022-09-18 - 摘要：Most polymeric materials,including plastics、rubbers、fibers、coatings and so on,underwent photoaging when used outdoors and their services lifes were thus cut down.In order to protect effectively the polymeric materials from photo-deterioration,the mechanisms of photo-aging and photostabilization of polymers had been studied widespreadly and several types of light stabilizers developed successively.But since the photo-aging of polymers had been being made more and more complicated by the continuously extended ranges of use and deteriorated environment and their photo-protection becoming more and more difficult,the study of the mechanisms of photo-aging and photostabilization of polymers and development of light stabilizers were very active all the way at home and abroad.In the second part of this paper,the action mechanisms of light stabilizers were expounded and the advances in development of light stabilizers were reviewed.关键词：Polymer;Light stabilizer;Photostabilization
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发布时间：2022-09-18 - 摘要：The technical specifications of aramid fiber sheet and fiber/epoxy composite materials used for reinforcement of concrete structure are generally introduced in the present paper.The basis for design and construction procedure of AFRP technology are also given at the same time.As the first application case of this composite material and AFRP technology in civil engineering of China,the reinforcement of Xiangtan huge bridge in Hunan-Guizhou railway is summarized to show the advantage in construction and the perfect strengthening results.关键词：Aramid fiber;FRP;Reinforcement
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发布时间：2022-09-18 - 摘要：The characteristics of polymer physics has recently challenged the teaching way because it consists of various contents related to the knowledge both of physics and chemistry .The acceptors will face to both science and engineering requirements from the industries or research institutions when they graduate .And since the polymer science is a new established science with less than 100 years history, there are more and more achievements in polymer physics that should be supplied to the teaching course .We suggest that the teaching material should be reorganized bilingually with case analysis and the teaching process should be grasped the main line of the relationship between structures and properties .Good teaching results will be achieved when the interactive way is conducted, expression is modified, the achievements especially by ourselves are introduced, and various teaching aids and multimedia courseware are managed .关键词：Polymer physics;Teaching way;Reform;Education
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发布时间：2022-09-18
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