摘要:Polymers can self-assemble into nano-materials through molecular recognition and/or molecular interactions.Resultant nano-materials will be potentially used in microelectronic, new material and biotechnology areas.This article reviews the ways of self-assemble synthesis of low dimension nano-structural polymers and their applications.
摘要:Mechanical chemical reaction refers to the course of exchangement between chemical energy and mechanical energy.Because mechanical chemical reaction can exchange chemical energy and mechanical energy with each other directly without pollution, noise and waste, it gains concern of the countries all over the world, especially the developed countries.Information civilization needs the corresponding material and the conversion of energy and information state.It is an inevitable demand for development of this era to grasp and use information.For this reason, through an analysis of material exited state of polymer, discussion was carried on principle of mechanical chemical reaction from the angle of the cooperation among material, energy and information to explain the reason of exchangement between chemical energy and mechanical energy by soliton excitation.With the development of the synthetic technology of polymer, a new energy source and a mode of energy conversion can be found and provided by the means of mechanical chemical reaction for the era of information of civilization and lead to a new industrial revolution.
摘要:This artical reviews the work three-step on the synthesis soluable polysilsesquioxanes(PSSQ) with high molecular weight and their copolymer by the equilibration hydrolysis of phenyltrichlorosilane, phenyltrialkoxysilane, methyltrichlorosilane, methyltrichlorosilane and methyltriacetoxysilance respectively with alkal-i catalyzed reaction. One-step synthesis of thermoplastic phenylsilsesquioxane polymer with phenyltrichlorosilance as the started materials is introduced.The synthesis of insoluable PSSQ with cube structure with three kinds of organic functional radicals as materials, by alkal-i catalyzed, equilibration method is concluded.At last, metal halide catalyzed nonhytrolytic so-l gel route to organosilsesquioxanes gel are defined.These should be helpful to the synthesis of different PSSQ with different structure.
摘要:Water-borne epoxy resin has been synthesized by grafting route, epoxy resin, methacrylic acid, butyl acrylic as primal materials.The mechanism of the preparation, emulsification and curing of the resin were described, and the whole course was analyzed.The correlative factors on each step reaction were discussed in detail.
摘要:Grafting is a common method for modification of carbon blacks.In this paper new grafting methods including secondary grafting, γ-ray radiation grafting, trichloroacethyl group and hexacarbonyl molybdenum induced grafting of vinyl monomer, coupling grafting and cross-linking with polymers and other methods are discussed in detail.Additionally, the applications of grafted carbon blacks in the fields of new materials are also introduced.
摘要:PLA nanoparticles coated with transferrin were prepared by nano-precipitation using transferrin liquor as external aqueous phase.The nanoparticles were radiolabeled by two methods, i.e., directly labeling by99mTc and DTPAA chelate indirectly labeling, using SnCl2 as reducing agent.The activity of transferrin on the surface of PLA nanoparticles radiolabeled was studied by C6 glioma cell experiment in vitro, and the results showed that The activity of transferrin was damaged when directly deoxidized with SnCl2, whereas DTPAA indirectly labeling has little effect on the transferrin activity.The biodistribution of radiolabeled nanoparticles was investigated by SPECT and γcounter technologies.The distributions of surface-containing transferrin PLA nanoparticles were concentrated mainly at liver and spleen after intravenous injection.When seeding the brain with C6glioma cell, the brain ingestion of surfacecontaining transferrin PLA nanoparticles was slightly increased.
摘要:This paper has reviewed the polymer craze and its progress.The content includes craze difinition, classification, initiation, growth, fracture and the crystalline polymer craze.
摘要:Recent development of waterborne epoxy resin at home and abroad was reviewed in a systematic way. Some features and applications on waterborne epoxy resin were introduced, and a new method for preparing waterborne epoxy resin emulsion was indicated.
摘要:Interpolymer complexes can be formed by two polymers through hydrogen bond or electrostatic force include hydrogen complexes and polyelectrolyte complexes.These kinds of complexes obtained from physical blending method exhibit remarkable different properties in comparison with mono-component polymer.As the result of these special properties, interpolymer complexes have been attracting much more attention in extensive application and progress in many fields, such as biology medicine, pervaporation separation, viscosifier and so on.In this paper, we introduce the research and development of the interpolymer complexes in these fields.
摘要:Recently chitosan is focused in the research of gene delivery system for it is already known as a biocompatible, biodegradable and non-toxic polysaccharide.This article is to summarize the recent development of chitosan and its derivatives as non-viral vectors for gene transfection.And the influential factors of the transfection efficiency are also discussed such as molecular mass of chitosan, size of chitosan nanoparticle and depolymerization of chitosan.
摘要:A preliminary idea to combine the experiments of polymer chemistry, the polymer physics and the polymer processing into an interdependent and interactive course "The fundamental experiments of polymer science" is presented in this paper.