最新刊期
卷 24 ， 期 3 ， 2011
- 摘要：Real-time measurement technologies can achieve a continuous diagnosis in polymer processes,and have no influence on production line.Fast and effective online diagnosis technology is increasingly finding uses for controlling the quality of polymeric materials during all phases of production and for minimizing waste in the form of off-spec materials.So,real-time diagnosing and monitoring technologies play a key role in improving the market competitiveness and become a hot researching field.In this paper,examples of developments in real-time diagnosing technologies and their applications to polymer processes will be presented.The diagnosing methods will mainly focus on spectroscopy,optical microscopy and acoustic.In this article,the application fields of real-time diagnosing technologies include the rheological behavior,structure changes,the residence time distribution,and the development of morphology in polymer processes.In addition,the limitations of different technologies will be compared in this article.The aim of this paper is give a contribution in the research in real-time technologies.关键词：Polymer;Processes;Real-time diagnosis
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发布时间：2022-09-18 - 摘要：Recently,considerable interests have been attracted by these poly (lactic acid) based copolymers with non-linear structures,such as graft,star,comb-like,hyperbranched,and dendritic polymers.This paper has introduced the characteristic and advantage of these copolymers with nonlinear structures.The recent progress in the synthesis and application of poly (lactic acid) based copolymers with non-linear structures,especially star-shaped and dendritic copolymers,has been reviewed.关键词：Poly(lactic acid);Copolymer;Star-shaped;Dendrimer
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发布时间：2022-09-18 - 摘要：Polysaccharides are abundant organic compounds in nature,generally produced by living organisms. They exhibit a large variety of complex chemical structures, conformations and physiological functions,thus receiving more and more concerns nowadays.Among polysaccharides family,β-1,3-glucans are the most extensively studied because of their inherent,strong helix-forming nature which has never been observed for other polysaccharides.Due to remarkable and unique mechanical,electrical,optical and thermal properties,carbon nanotubes have been one of the most promising nanomaterials.Recent studies have also shown that synthetic oligonucleotides are useful in treatment for various incurable diseases.In addition,how to produce a nanofiber structure for conductive polymers and nanoparticles have attracted much attention during the last decade.In the above three research fields, recent investigations have proved that the unique properties of polysaccharides can be utilized. The present paper makes a review of research progress on polysaccharides,especially β-1,3-glucans,mainly focusing on non-covalent modification of carbon nanotubes,targeting delivery of functional nucleotides,inclusion of conductive polymer,being a polymerization vessel and induction of arrangement of nanoparticles.关键词：Polysaccharides;β-1,3-Glucans;Carbon nanotubes;Functional nucleotides;Nanofiber
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发布时间：2022-09-18 - 摘要：PHB is a kind of nature biodegradable high molecular materials.Because of its excellent biocompatibility,PHB has been used widely in the biomedical field.The electrospinning technique seems to be the most suitable one in order to obtain nanofibers and has successfully prepared many different kinds of nanofibers,especially in the aspect of preparing composite nanofibers.This paper presents the status and progress of electrospun PHB based nanofibres.The influence factors of electrospun PHB based nanofibres are introduced and the performance and future potential of its production are analyzed.Lastly,some problems to be solved in future on electrospun PHB based nanofibres are proposed and the development prospect of the electrospun PHB based nanofibres is as well forecasted.关键词：Electrospun;β-Polyhydroxybutyrate(PHB);Nanofibres
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发布时间：2022-09-18 - 摘要：This paper mainly summarized the application of iron-based catalyst in ATRP,which accentuated the development of iron catalyst system of common ATRP and AGET ATRP.Other systems such as R-ATRP of iron catalysts was also introduced briefly in this paper, including ligands of the catalyst and removal of the catalyst residue from its products.Many studies show that iron-based catalyst not only have good catalysis but also easy to remove in ATRP.It also has high value in the design of new polymer materials.At last,the advantages of iron-based catalyst system such as innocuity,easy removal,etc.were summed up and its prospect was proposed.关键词：Atom transfer radical polymeriation;Iron catalyst system;Ligand;Removal of catalyst
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发布时间：2022-09-18 - 摘要：Self-Assembly is the process by which a system of molecules relied on non-covalent interaction spontaneously assemble into a structure-determinated and stable molecular aggregates or supramolecular structures which possess specific functions or performances in the mean time.Block copolymer systems exhibit well-known ability to self-assemble into a wide variety of morphologies either in bulk (lamellas,gyriods,cylinders,spheres,etc.)or in solution (spherical micelles,vesicles, cylinders,etc.).In this paper, the main factors which may influence the self-assembled morphology of the block copolymers in solution, including the length of the building blocks, the property of the selective solvents, the concentration of the block copolymers and the pH value of the solutions, are reviewed.Moreover,various methods of the computer simulation for the self-assembly of the block copolymers,such as self-consistent field theory, simulation of Monte Carlo, dissipative particle dynamics and simulated annealing,are introduced.关键词：Self-assembly;Block copolymer;Influencing factor;Computer simulation
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发布时间：2022-09-18 - 摘要：Because of their high barrier prosperity that prevents the permeation of small molecular, liquid crystalline polymers have attracted considerable attention for its applications as barrier layers and separation membranes et al.This paper first introduces the structural characteristics and physical properties of liquid crystalline polymers,and then two pass models of small molecular permeation through liquid crystalline polymer membrane are described.It is now generally agreed that the liquid crystal as being impermeable like a 3-dimensional crystal.Small molecules can permeate only in defect regions in the polymer or the phase boundaries among liquid crystalline domains.The relationship between the mesogenic state of polymer liquid crystalline phase and the small molecular permeation properties is also summarized.Liquid crystalline phase content and free volume ratio of a polymer,the orientation and distribution of the mesogens phase,can affect the permeability of small molecules pass through the polymer membrane,which accords with the well known sorption-diffusion model for molecular transportation.New characterization method for measuring very low permeability of small molecular transportation in super barrier materials and the new applications of super barrier liquid crystalline polymer are reviewed.Problems of the application of liquid crystalline polymers as packaging materials and our perspectives of the future development of liquid crystalline polymers are also given at the end of the paper.关键词：Liquid crystalline polymer;Barrier;Permeation;Packaging Materials
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发布时间：2022-09-18 - 摘要：Through microencapsulation,a novel flame retardant (FR) with core-shell structure can be obtained.The shell outside the FR leads flame retarded polymer composite lower moisture absorption,better compatibility,mechanical property and higher flame retardancy.Recent advances for microencapsulation of halogen containing FR,magnesium hydroxide,red phosphor,inorganic and organic phosphor based FR,and intumescent FR are introduced and discussed.Moreover,the research emphasis and development trend of the FR with core-shell structure are proposed.关键词：Flame retardant;Core-shell structure;Microencapsulation
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发布时间：2022-09-18 - 摘要：Due to their special physical and chemical properties and extensive potential applications, polymer hollow microspheres have drawn more and more attention in recent years.This paper reviewed the progress of the preparation methods of the polymer hollow microspheres,including template methods,emulsion polymerization,and self-assembly methods.The application of hollow microspheres in medical fields were also discussed.关键词：Polymer hollow microspheres;Preparation methods;Application
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发布时间：2022-09-18 - 摘要：This article summarized the preparation methods of polyurethane/nano-composite materials in recent years. It mainly introduced the blending method, in situ polymerization method, intercalation polymerization method, sol-gel method, etc, which were commonly used in the preparation of polyurethane nano-materials modified. Elaborated a number of methods of surface modification, which used for nano-materials. Finally, the researcht rends of the polyurethane/nano-composite materials were pointed out: The dispersion of nanoparticles still need further study and prefection; For the rarely reported nano-diamond, nano-SiC and other new super-hard nano-materials need more researches and applications; Polyurethane/nano-composite materials'new preparation needs further/ deeply study; Its Industrial applications wait for further develop.关键词：Polyurethane;Nano-composite materials;Surface modification;The preparation methods
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发布时间：2022-09-18 - 摘要：Polymerizable inorganic oxide hybrid nanomaterials have better dispersing properties in UV curable coatings and can photopolymerize with organic matrix of coatings to form M—O—M linkages in cured films,thereby,the mechanical properties of films are improved,such as thermal stability,hardness,resistance to abrasion and so on.For the preparation of these materials,silylation by organosilanes,grafting with chemical compounds or preparation by sol-gel technology have been commonly used and extensively studied up to now.Progress in preparation of these nanomaterials and their application in UV curable coatings are reviewed.Finally,the suggestions for research and industrial application of these materials are also discussed.关键词：Inorganic nano-oxides;Inorganic hybrid nanomaterials;UV curable
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发布时间：2022-09-18 - 摘要：Advance in organic polymeric biocides was reviewed in this paper.Biocides with different antibacterial functional groups,such as quaternary ammonium salts,quaternary phosphonium salts, organotin,pyridine,guanidine,N-halamines,and chitosan derivatives,their synthesis and application were described respectively. The development of quaternary ammonium salts and quaternary phosphonium salts polymeric biocides was introduced in detail,and their advantage and disadvantage were compared.The preparation and antimicrobial mechanism of several organic polymeric biocides which had been developed rapidly in recent years were introduced.Meanwhile,the foreground of the development trend of polymeric biocides was also discussed.The improvement of antimicrobial performance and stability of biocides would be main point of polymeric biocides in the future.关键词：Polymeric biocide;Antimicrobial group;Preparation method;Antimicrobial mechanism
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发布时间：2022-09-18 - 摘要：Poly (butylene succinate) (PBS) is one of the aliphatic polyesters with biodegradability and biocompatibility.This paper reviews the progress of PBS based polymers in the syntheses, modifications and application as control drug carrier.Furthermore,the future studies on PBS based polymers would be focused on the introduction of functionalized groups,simplification of synthetic route,reduction of cost and the performance of the modified materials related to such areas.关键词：Biodegradability;Biocompatibility;Aliphatic polyester;Poly(butylene succinate);Modification
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发布时间：2022-09-18 - 摘要：Polymer brushes constructed on substrates or interface are a kind of material surface modification approaches with a great application potential.The main methods of polymer brushes constructed on substrates,interfaces,and especially on the surfaced of silica were introduced from that of the concept and formation conditions.On the basis above,the application of silica particles and the defects are indicated,with further development suggestions.关键词：Polymer brushes;Silica;Surface modification
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发布时间：2022-09-18 - 摘要：In this paper,one specially reusable and easy-operated graphical user program for plotting copolymer composition curve is developped with Matlab GUI tools. Its development process includes conceiving graphical user interface, the drawing and adjustment of control,setting the graphic object properties,the compilation and debugging of M-file.The graphical user program can achieve functions of plotting, parameter display,snapping coordinates and setting curve style ect. .Good results has been received in the teaching of polymer chemistry by using it, the internal relations between the trend of composition curve and the value range of reactivity ratio,and the fundamental reasons of this relation can be obtained through randomly inputting values of reactivity ratio;The method of control copolymer composition also can be found by monomer feed ratio which was confirmed according to using the graphical user program.关键词：Matlab GUI;Copolymer composition curve;Graphical user interface
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发布时间：2022-09-18 - 摘要：Polymer chemistry is a science of researching on polymerization mechanism and methods, and is one of the most important specialized courses for the students majoring in polymer materials. Polymer chemistry is closely related to previous course "Organic Chemistry". The application of organic chemistry knowledge in polymer chemistry can mobilize the enthusiasm of learning and promote the comprehension to the teaching difficulties in order to improve the quality of teaching and acquire the better efficiency of learning.In this paper,based on teaching practice of Polymer Chemistry and Organic Chemistry,some examples and opinions about the application of organic chemistry knowledges in the polymer chemistry teaching are put forward.关键词：Teaching;Polymer chemistry;Organic chemistry;Application
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发布时间：2022-09-18
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