最新刊期
卷 26 ， 期 5 ， 2013
- 摘要：Recently,the contamination of water resource becomes increasingly serious, and how to deal with the oily waste-water is the crucial problem of the environment protection. The high oil-absorbing material is a kind of new functional materials is different from the traditional oil-absorbing material, with excellent performance such as high oil absorption ratio, good selectivity of oil and water and reusable. Developing high oil-absorbing materials has already attracted domestic and foreign researchers' attention. This paper aims at summarizing the research progress of the high oil- absorbing materials, introducing the oil absorption mechanism and all kinds of preparation methods of the high oil-absorbing materials,and gives the developing prospect of the high oil-absorbing materials.关键词：High oil-absorbing materials;Rubber;Resin;Mechanism;Preparation method
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发布时间：2022-09-18 - 摘要：Long-chain hyperbranched polymers (HyperMacs) with well-defined and well-adjusted linear chains between branch points have received widespread attention in the macromolecule research due to their potential applications in various fields such as drug carrier, energy storage, and delivery, nanotechnology and catalysis. In this paper, we reviewed the various synthetic strategies for HyperMacs: including iteration and AB_x linear macromonomer apporaches. In addition, new research trends are expected based on the progress of this kind of polymers.关键词：HyperMacs;Iteration;AB_x macromonomer;Condensation;Hydrosilylation;Click reaction
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发布时间：2022-09-18 - 摘要：Polymeric ionic liquids(PILs) are polymers that have repeating unit bearing an electrolyte group of cation or anion. These polymers combine the advantages of ionic liquids and polymers, and have attracted broad attention in the field of polymer chemistry and materials science in recent years. In this review,PILs are classified as polycation-type ILs, polyanion-type ILs, poly(zwitterions)-type ILs and copolymer-type ILs, and the properties and synthesis method of each type of PILs are introduced. Moreover, the application of PILs as organic dispersions, nanocomposites,electrochemistry, sorbents and separation are summarized.关键词：Polymeric ionic liquids;Radical polymerization;Ionic conductivity;Sorbents
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发布时间：2022-09-18 - 摘要：High speed centrifugal spinning is not same as electrospinning and is a new,simple and effective technology to fabricate nanofiber with many unique and potential characteristics such as no high electrostatic force,high production rate, simple mechanical and no pollute and so on. This technology can increase the selection of various materials such as polymer, ceramics and metal. It has developed during the past two years and drawn special attention recently. In order to investigate the current status of high speed centrifugal spinning,we review its development status and principle and study the relation between the rotation speed, solution concentration, orifice, collection and the diameter,fiber morphology.关键词：High speed centrifugal spinning;Nanofiber;Aligned
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发布时间：2022-09-18 - 摘要：Cancer is one of the main reasons of the world' s high death rate. Chemical treatment would be the most effective way to remedy cancer. In order to promote the intracorporal dissolvability and intracellular cumulant of anticancer drugs, the destruction to cancer cells as well as to decrease the damage to normal tissues, the anticancer drug delivery system develops from simple carriers, like conjugations of anticancer drug and polymer, polymer micelles, simple nanoparticles,to advanced delivery system with properties of targeting, responding to environmental stimulation as well as charge reversal. This article mainly talks about the development progress of anticancer drug delivery system and highlights the preparation and theoretical research of new designed anticancer drug delivery system.关键词：Polymeric;Anticancer;Drug delivery
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发布时间：2022-09-18 - 摘要：In this work, a composite of lignin and natural rubber (L/NR) with interpenetrating network structure has been prepared by co-precipitation method in sodium hydroxide aqueous solution. Then, the well prepared composite was employed as a reinforcing agent and partially substituted white carbon black (WCB),a traditional reinforcing agent, in preparation of enhanced styrene-butadiene rubber (SBR) through a three-stage mixing method. The experimental results indicated that the mechanical properties of SBR including the tensile strength and elongation at break had been both improved after blending L/NR composite. While the dynamic thermal mechanical analysis revealed that the glass transition temperature of SBR decreased, and the cold tolerance improved, but the wear resistance slightly decreased.关键词：Lignin/natural rubber composite;Styrene-butadiene rubber;Enforcement
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发布时间：2022-09-18 - 摘要：This paper focuses on the research of mechanical and electrical characteristics of electro-active paper (EAPap). EAPap can undergo a large bending displacement at a relatively low voltage under low power consumption in dry conditions. The EAPap is a complex anisotropic material,which has not been extensively characterized and additional basic and design testing are required before developing application devices from EAPap. By calculating, the initial Young' s modulus of EAPap is in the range if 5-8GPa. The thermo-mechanical analysis of EAPap is investigated to determine such factors as the degree of dimensional change due to dehydration and the maximum use temperature. Fatigue test identifies critical properties of this under-analyzed class of materials to provide a measure of its fatigue capabilities. The electrical impedance analysis and dielectric property measurement with frequency are also important information that allows us to characterize the electrical behavior of EAPap. Finally, the performance of EAPap is measured in terms of tip displacement, blocking force and electrical power consumption.关键词：Electro-Active ploymers ( EAP);Electro-Active papers ( EAPap);Mechanical test;Thermo-mechanical analysis (TMA);Dielectric property
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发布时间：2022-09-18 - 摘要：The objective of this work was to study the adsorption performances for p-nitroaniline onto the p-cresol hyper-cross-linked resin (denoted GQ-03). GQ-03 resin was synthesized with chloromethylated polystyrene and p-cresol by Friedel-Crafts reaction. Dichloroethane was used as solvent. The results showed that the BET surface area of GQ-03 resin was up to 1154. 45m2 /g. Only microporous and mesoporous were present in GQ-03 resin and there were no macropores in the polymeric adsorbent. The adsorption property of p-nitroaniline onto the GQ-03 resin was superior to commercial NDA- 88 resin, NDA-99 resin, NDA-150 resin, XAD-4 resin and H103 resin. The maximum adsorption capacity of GQ-03 resin emerged the pH range of 3. 1-8. 0. The adsorption capacity of p-nitroaniline onto the GQ-03 resin increased with the increase of the temperature. The adsorption isotherms could be correlated to the Freundlich model. The saturated adsorption quantity of p-nitroaniline was up to 154. 41mg • mL-1. The resin could be desorbed with 8. 8BV 80% ethanol and lmol/L hydrochloric acid. The desorption rate was 98. 82%.关键词：Hyper-cross-linked resin;p-Cresol;p-Nitroaniline;Adsorption
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发布时间：2022-09-18 - 摘要：The monodispersed anionic polystyrene (PS) microspheres were synthesized via emulsifier-free emulsion polymerization with polystyrene (PS) and acrylic acid (AA) as monomers. The effect on PS microspheres structure and monodispersity was discussed. The results indicate that the copolymer has been prepared and AA comonomer makes the size of PS particles decrease and endow the particle surface electronegative. It is also observed that the polymerization activation energy is 42. 95kJ/mol and the reaction rate increases with the polymerization temperature raising. With the increasing of KPS amount, the particle size also decreases and exhibits the optimum monodispersity when the amount of KPS reaches 0. 6%. Additionally, with the increase of acetone amount, the solubility of polymer increases which induce the particle size to decrease and the size distribution to become broader.关键词：Anionic polystyrene microsphere;Emulsifier-free emulsion polymerization;Monodispersity
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发布时间：2022-09-18 - 摘要：Two dimensional small angle X-ray scattering (2D-SAXS) method was used to study the characteristic long period structure of polyacrylonitrile precursor. Based on the high resolution measurements, the scattering signal comes from the micro-voids and long period structure was separated successfully by the mathematic analog computation treatment. Research method for the long period structure which includes the arrangement of the crystalline and amorphous regions for PAN precursor was established. Combining with the correlation function, analysis the detail structural parameters such as the long period, the thickness of crystalline and amorphous regions for PAN fiber were obtained. The crytallinity of the fiber was calculated and compared to the data which was determined by traditional WAXD measurement.关键词：PAN fiber;Coagulated;SAXS;Long period structure
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发布时间：2022-09-18 -
Thermal Stability Study for Allyl Methyl Phenol Ether/Bismaleimide/Diallyl Bisphenol A Ternary Blend
摘要：The bismaleimide (BMI) /diallyl bisphenol A (DABPA) blend system is an important system for usage for its high stability, but its high viscosity prevent its usage in factory. Possessing high active group, allyl methyl phenol ether can react with BMI/DABPA resin through cross-linking reaction under heat condition, it has been used as the reactive diluent. Thus AMPE can reduce the viscosity of the resin system and increase heat resistance. Through determination the viscosity and TGA data of this blend containing different content allyl cresol ether, an appropriate proportion (AMPE: BMI: DABPA =10〜20: 36 : 29. 2) has been obtained to increase the production benefit. This conclusion will be helpful for industry to increase product quality and productivity effect.关键词：Bismaleimide resin;Diallyl bisphenol A;Allyl methyl phenol ether;Reactive diluent- 2
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发布时间：2022-09-18 - 摘要：Structure, purifying and chemical modifing methods of lignosulfonate surfactants are discussed in this review. The researching progress and challenge of modified lignosulfonate as surfactants in various areas has also been introduced. Finally, we make a conclusion that it is necessary to enhance researches on structure and property of lignosulfonate, based on the latest achievements of interfacial chemistry and modern analytical methods. Reducing color and improving surface activity of lignosulfonate is considered to be fundamental problems. The development of novel lignosulfonate surfactants that can be used in daily chemical industry is an important developing trend to take good utilization of lignosulfonate. In addition, lignosulfonate has a great potential in fabrication of advanced material such as conductive polymer.关键词：Lignosulfonates;Structure;Purification;Chemical modification;Surfactants
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发布时间：2022-09-18 - 摘要：The textbooks are the fundamentality of teaching and an excellent textbook may be favor for several generation in university. Based on writing of "Structure and Properties of Polymers, Updated Edition",four fundamentals of writing textbook were proposed, i. e. textbook author should take teaching research deeply, do own scientific research in the field, pay attention to science research results did by the native scientists, and writing the textbook unremittingly and continuously. Several problems in writing textbook were discussed as well.关键词：Polymer physics;Structure and properties of polymers;Textbook;Teaching study
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发布时间：2022-09-18 - 摘要：On the basis of detailed analysis for teaching content, teaching methods, experimental and practical system, and assessable standard, the current situation of teaching of polymer processing course was investigated. The simple pattern of academic teaching was not enough to improve the overall quality of students in polymer specialty. It was obvious that comprehensive experimental system and diversified examination displayed absent in current teaching process. The principle of practical reform in educational system for polymer processing course was that students were cultivated the capacity of acquiring and applying knowledge. The practical problem during production and the cuspidate achievement in scientific research were introduced into the teaching contents of polymer processing course. Previous simple theoretical teaching was changed to incorporation of theoretical and practical teaching. The assessable standard for students, including daily exercise, research proposal, oral statement, experimental manipulation and examination, displayed more diversified. It was one of the highlights that a comprehensive experimental and practical system was added as the important parts of practical reform, which benefitted to enhancing the professional comprehensive quality of students. They were required to master the theoretical foundation of the polymer processing course, at the same time, have the manipulative ability. It was the basic requirement for students to analyze polymer properties, choose processing condition, and prepare polymer product by suitable processing methods.关键词：Polymer processing;Practical teaching;Overall quality;Educational reform
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发布时间：2022-09-18 - 摘要：The reform method, scheme and operating process of polymer materials and engineering experiments of Jilin Institute of Chemical Technology were introduced in this paper. How to revise specialty experiment teaching program, to compile an experiment teaching material,to develop teaching softwares,to make laboratory opening programs and the execution plans etc. were discussed to cultivate and improve the student's innovation ability. Not only does the manipulative ability and related experiment skill of student were strengthened,but also their scientific experiment thinking and attitude by innovation.关键词：Polymer materials and engineering;Experiments;Reform;Innovative ability
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发布时间：2022-09-18
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