最新刊期
卷 31 ， 期 1 ， 2018
- 摘要：The diverse applications of polymers in all aspects evoke research of macromolecules with a characteristic of multidiscipline. The notable achievements have been obtained in multidiscipline intersection as reveled by the progress introduced in this review. Chinese polymer scientists contributed core paper in those top fields in polymer chemistry or material science frontiers report by Clarivate Analytics. Several National Scientific Awards granted to polymer scientists recently. Numerous transformations of technological achievements to polymer industry have been successfully preceded in last year. Finally,the changes in framework of NSFC funding programs related to polymer as well as issues in application in 2018 have been introduced briefly.关键词：Polymer sciences;Rsearch progress;NSFC funding
- 17
- |
- 15
- |
- 1
发布时间：2022-09-05 - 摘要：Biodegradable polyesters have attracted much attention because of their environmentally friendlily. The metal catalyst plays a very important role in their preparation. Up to now, tin-based catalysts are often used to catalyze ring- opening polymerization of cyclic ester monomers in the industry,in which the cost is high and the residues of tin in the polymer also limit their applications. Iron is the abundant metal elements on the earth,and it also has a friendly and unique biological activity for human being. Iron compounds can catalyze cyclic ester polymerization under mild conditions,which is a potentially important green catalyst for biodegradable polyesters in the future. In this paper, the progress of iron catalyst for preparation of biodegradable polyesters was reviewed from several aspects.关键词：Catalyst;Ring-opening polymerization;Iron compounds;Biodegradable polyesters
- 6
- |
- 9
- |
- 0
发布时间：2022-09-05 - 摘要：Recently, polymerization-induced self-assembly( PISA) has been used to prepare block copolymer nano-objects of controllable size,shape,and surface chemistry via reversible addition-fragmentation chain transfer (RAFT) polymerization methods. Some polymer materials with excellent functions were further obtained by functional encapsulation with these copolymer nano-objects. This paper gave a general overview about preparing multiple morphologies of block copolymer aggregates via RAFT-mediated PISA in heterogeneous polymerization system,and introduced the process of morphological development under different polymerization methods,the adapted monomers and the factors influencing the morphological transition. In addition,the advances of PISA in the functional particles encapsulation, the potential applications and limitations of PISA concepts were also presented.关键词：Polymerization-induced self-assembly ( PISA);reversible addition-fragmentation chain transfer (RAFT);functional encapsulation;heterogeneous polymerization
- 5
- |
- 10
- |
- 1
发布时间：2022-09-05 - 摘要：Polypyrrole (PPy) has good charge transport properties and PPy composites with metallic oxides or sulfides have excellent electrochemical properties. The latest development in preparing different morphologies of PPy and its composites are reviewed in this paper,including hard template and soft template methods. PPy and single metallic/ bimetallic oxides or sulfides can be built into different forms of composite materials such as fibrous,tubular,spherical structures. The chemical oxidative polymerization of different morphologies of PPy and its composites are emphasized in this paper. Recent developments on PPy-based composites for various electrochemical applications, including supercapacitors, lithium ion batteries and sensors, are also discussed.关键词：Polypyrrole;Compound material;Chemical oxidative polymerization;Electrochemical properties
- 9
- |
- 12
- |
- 1
发布时间：2022-09-05 - 摘要：Multiwalled carbon nanotube/polypropylene (MWNT/PP) composites were prepared by melt blending. The crystallographic form and non-isothermal crystallization kinetics of polypropylene (PP) and MWNT/PP composites were investigated by X-ray diffraction (XRD) and differential scanning calorimetry (DSC). Mo equation was used to indicate the kinetics of non-isothermal crystallization of PP and MWNT/PP composites. The results show that, the addition of multiwalled carbon nanotube (MWNT) leads to the transition of PP from β crystallographic form to a crystallographic form. MWNT has an obvious nucleating effect on the crystallization of PP,increasing crystallization temperature and crystallization rate. On the contrary,the activation energies of MWNT/PP composites are higher than that of pure PP. MWNT can decrease the cooling rates of PP needed to reach relative crystallinities in a unite time.关键词：Melt blending;Multiwalled carbon nanotube;Polypropylene;Crystallographic form;Non-isothermal crystallization kinetics
- 7
- |
- 10
- |
- 1
发布时间：2022-09-05 - 摘要：Recently,as a new polymerized method,the method of single electron transfer living radical polymerization (SET-LRP) was widely used in the field of polymerization and modification. In this paper, compared with other methods of living radical polymerization,the obvious advantages and disadvantages of SET-LRP were analyzed. And the use of SET- LRP technology in preparation of block copolymer, star and branched polymers, cyclic polymers were reported. Finally, the SET-LRP technology were applied in surface modification of solid materials,such as the polymerization on the surface of inorganic material,and the organic molecules grafting on the surface of polymer latex etc.关键词：Single electron transfer living radical polymerization;SET-LRP;Polymer modification
- 5
- |
- 10
- |
- 1
发布时间：2022-09-05 - 摘要：Aramid fiber is a kind of man-made fiber with high performance,which makes it has a wide range of applications in various industries,high-tech field because of its unique high strength,high modulus,high temperature and so on. At present, Chinese aramid industry has made great progress, but compared with the world first class enterprises, Chinese products need to improve in quality and production. China's aramid product application market mainly concentrates on the lower market,because it lacks the suitable functional modification method. This paper summarizes the development of aramid fiber,the relationship between structure and property,different spinning processes and the relevant applicable areas. On the basis of this,the paper reviews the research progress of functionalization of aramid fiber in recent years. Through its understanding of the relationship between structure and performance,it will help more researchers to carry out functional modification research to meet the needs of different applicable areas. Finally,the paper prospects the future of its functional research.关键词：Aramid fiber;Poly-p-phenylene terephthamide;Poly-m-phenylene isophthalamide;Spinning method;Function
- 9
- |
- 16
- |
- 10
发布时间：2022-09-05 - 摘要：Polymer physics is an important professional basic course of students majoring in polymer materials and engineering. "Crystallization" is an important concept in aggregation structure of polymer. Large molecular weight and long chain molecular structure make the crystallization process of polymers more complicated compared with that of small molecules. In the teaching process of polymer physics,we introduce students the relationship between crystallization and ordered,chain flexibility,glass transition temperature,and put some concepts in series,which are related to crystallization (such as crystallinity, crystallization temperature, melting point and crystallization rate). The aim is to establish scientific cognitive system about polymer crystalline structure for students in their preliminary stage. Practices show that the majority of students have a good understanding and mastery of these teaching contents through this way.关键词：Polymer physics;Teaching;Crystallization;Ordered
- 9
- |
- 10
- |
- 0
发布时间：2022-09-05 - 摘要："Polymer polymerization technology" is a core polymer professional course, plays a very important role in the development of students' interest and ability to solve practical problems using theoretical knowledge, and their innovation and creation abilities. In this paper,it discussed the teaching method of this course from the aspects of plate teaching contents,"question type"teaching mode and various examine ways. The plate teaching contents are divided into the current development of polymer, the source of raw materials,the general production process,the free radical polymerization,the ionic polymerization and step reaction polymerization. The question type" teaching mode includes teachers or students to prepare questions. Aided by a variety of assessment mode to improve the students' learning initiative and problem solving ability.关键词：Polymer polymerization technology;Plate teaching contents;"Question type"teaching mode
- 6
- |
- 10
- |
- 0
发布时间：2022-09-05 - 摘要：In view of the shortcomings of the cultivation of the experimental design ability of polymer chemistry in universities in China,the teaching mode of "WeChat group and flipped classroom"was introduced in the teaching process of polymer chemistry experiment. Teaching video materials and learning materials were transmitted to students in order to move the classroom explanation before class by teachers using WeChat. It could adjust the internal and external class time of polymer chemistry experiment. It was helpful for teachers to train students to design polymer chemistry experiments. It could help teachers to focus on cultivating students' design ability of polymer chemistry experiment. The methods of cultivating the students' design ability of polymer chemistry experiment were classified instruction of the design of polymer chemistry experiment,strengthening the design method of polymer chemistry experiment and training the design steps of polymer chemistry experiment.关键词：Teaching mode of "WeChat group and flipped classroom";Design ability of polymer chemistry experiment;Cultivation
- 8
- |
- 12
- |
- 1
发布时间：2022-09-05
- Technical support is provided by Beijing Founder electronics co., LTD 京ICP备09064830号-19
京公网安备11010802024621 - It is recommended to read the content of this site in Chrome&IE9+. Please switch to extreme mode in browser 360.
- Cookies We use cookies to help provide and enhance our service and tailor content. By continuing, you agree to the use of cookies.
0