最新刊期
卷 24 ， 期 9 ， 2011
- 摘要：More and more attention has been paid to the research of membrane materials,with the development of membrane separation,proton exchange membrane fuel cell,and flow battery for energy storage.Poly(phthalazinone ether)s are a kind of membrane materials with excellent performance.Due to the polymer main chains containing aromatic heterocyclic twisted non-coplanar structure,poly (phthalazinone ether)s show good chemical stability,good themal stability,and can be soluble in common membranes casting solvents such as N-methy-l2-pyrrolidone and N,N-dimethylacetamide.Poly (phthalazinone ether)s show promising applications for thermally stable separation membranes and ion exchange membranes.In this paper,the development of poly (phthalazinone ether) s membrane materials and their applications for gas separation membranes,liquid separation membranes,and ion exchange membranes for energy field were reviewed.关键词：Phthalazinone;Poly(aryl ether);Functional membranes
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发布时间：2022-09-18 - 摘要：Cycloaliphatic epoxy resins (CEPs) have been used in a variety of important industrial fields such as microelectronic and LED packagings, insulation of electric generators, and fabrication of high-performance polymeric composites for aeronautics and astronautics due to their excellent processability, thermal stability, electric insulativity and UV radiation-resistance. In recent years, wide studies on the synthesis of cycloaliphatic epoxy resins have been undertaken to fulfill the increasing demands for physical properties. This paper describes the recent progress on molecular design and synthesis of novel cycloaliphatic epoxy resins with tunable functionality, crosslinking density and glass transition temperature, studies of influences of chemical structures of CEPs on thermal curing behaviors and physical properties of cured products, the toughening modifications of CEPs by incorporation of silane and alkoxyl groups as well as the thermally reworkable CEPs and their structure-property relationships. The trends for developing new CEPs are also int roduced.关键词：Cycloaliphatic epoxy resins;Synthesis;Structure-property relationship;Progress
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发布时间：2022-09-18 - 摘要：High-performance polymers with excellent comprehensive properties have been becoming crucial materials for their applications in aerospace,automobile,electronics,and other high technology fields.Modifying their processibility without sacrifice of their outstanding thermal stability is receiving considerable attention. Polymers containing phthalazinone moieties are a series of novel high performance thermoplastics.In this paper,the synthesis of poly(phthalazinone ether)s,involving poly (phthalazinone ether sulfone ketone) s,poly (phthalazinone ether nitrile sulfone ketone) s,poly (phthalazinone ether sulfone ketone ketone)s and poly(phthalazinone ether triphenyl1,3,5-triazine)s, and their structure-property were elaborately reviewed.They have outstanding thermal stability and good solubility in some aprotic polar organic solvents because of introducing twist and non-coplanar phthalazinone moiety into polymer main chain.Thus they can be processed by melting,such as injection,extrusion and molding,and in solution in the result of expanding their application,such as in coating and membrane.关键词：Poly (arylene ether) s;Polyamide;Polyarylate;Polyimide;Phthalazinone;High performance Polymer
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发布时间：2022-09-18 - 摘要：Living anionic polymerization is the primary method to synthesize the polymers with complicated topological structure,such as cyclic,dendritic and miktoarm star polymers.High vacuum technique is a powerful tool for the theoretical researches because excellent experimental environment free from impurities can be obtained.The studies on methodologies of living anionic polymerization using high vacuum technique were summarized.Some aspects,such as multi-functional initiators, macro-monomer,iterative titration coupling method,synthesis of cyclic polymers and new type functionalized polymers and combination of anionic polymerization and click chemistry, were introduced.关键词：Living anionic polymerization;High vacuum technique;Studies on methodologies
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发布时间：2022-09-18 - 摘要：Poly (aryl ether) s containing phthalazinone moiety are a series of high-temperature thermoplastic resins with high performance developed by our group,and can be processed in a number ways.They have many advantages including low cost,excellent mechanics properties at high temperature,and good solubility,compared with traditional poly (aryl ether)s.This article briefly introduces the recent progress in thermoplastic composites based on poly (aryl ether) s containing phthalazinone moiety,such as glass fiber reinforced composites,carbon fiber reinforced composites, powder reinforced composites,wear-resistant composites and functional composites.Moreover,the chemical and physical modification of matrix resin,optimization of fillers,and design of manufacture process for composites are also discussed.The thermoplastic composites have excellent comprehensive performance,and have wide application prospects.关键词：Phthalazinone;Poly(aryl ether);Composite;Thermoplastic resin
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发布时间：2022-09-18 - 摘要：Polyhedral oligomeric silsesquioxane (POSS)is a category of organosilicon compounds with peculiar nanostructure, which has a well-defined cage-like inorganic silica-like core surrounded by various organic groups. The inorganic core provides it with high hardness, while the organic groups endow it with good compatibility with the polymer matrix. In recent years, octaphenylsilsesquioxane (OPS)received much attention owing to its excellent thermal stability and diverse functionalization methods because of the presence of aromatic phenyl groups. In this paper, the synthesis and properties of polyhedral oligomeric silsesquioxane are de scribed, with the emphasis on the progress of functionalized octapheny lsilsesquioxanes, including octani tro-, octaamino-, octaacetyl-, polybromo-, polyhydroxy-, polyisocyanate-, polycarboxyl-, polychlorocarbonyl-, polymethacry late-OPS as well as the preparations of polyimide, polyurethane, polymethyl methacrylate and epoxy resin hypercrosslinked nanocomposites employing the OPS-based macromonomers as crosslinkers. The trends for developing new functionalized OPS compounds and their potential applications in aeronautics and astronautics, flame-retardant and functional micro/mesoporous materials fields are also introduced.关键词：Silsesquioxane;Octaphenylsilsesquioxane;Functionalization;Polymer nanocomposites
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发布时间：2022-09-18 - 摘要：Polymer gradient materials are relatively new concepts. However, they have exhibited superior properties compared with homogeneous systems. In this paper, the present research progress in polymer gradient materials are reviewed. The preparation methods of gradient materials was classfied into two main kind, such as extrnal field methods and physical or chemistry methods. Then the development of the new characterization technique-highthourghput and combinatorial approaches was expounded. It is believed that the methods will accelerate the development of the new materials. Finally, the applications including in medical or damping materals are also reviewed.关键词：Polymer;Composites;Gradient;Characterization
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发布时间：2022-09-18 - 摘要：Dendrigraft polymers are a class of highly branched macromolecules belonging to the dendritic polymerfamily. Steady and growing interest is quite noticeable for research directed toward the synthesis 、architecture and application of the dendrigraft. The highlight of this review is synthetic methodologies. Three distinct synthetic methodologies are considered for the preparation of these materials: divergent 'grafting-onto' 、divergent 'grafting-from' and convergent 'grafting-through'. Comparison of the other members of the dendritic polymer family: unlike the other dendritic counterparts, dendrigraft are not composed of repeatable monomeric units throughout the whole macromolecule, but only the side chains ;dendrigraft have the unique core-shell structures just like the others ;the size of dendrig raft are typically 1 ~ 2 orders of magnitude larger than their comparators. Interesting properties reported for dendrigraft are also discussed, as well as some applications.关键词：Dendrigraft;Dendritic family;Core-shell structure
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发布时间：2022-09-18 - 摘要：Polymer rare earth complexes possess excellent fluorescence properties and good processability. The study on synthesis and properties of these materials is significantly important for both academic research and practical applications in a variety of fields such as light-emitting display and optics communications. This paper reviews the recent advances in the synthesis of polymer rare earth complexes and structure-property relationships, with the emphasis on the novel synthesis method for the polymer rare earth complexes with high rare earth ion contents and intense fluorescence. In addition, this paper indicates the main problems existing in the current polymer rare earth complexes and future developing trend in this field.关键词：Polymer;Rare earth complexes;Fluorescence materials;Synthesis;Properties
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发布时间：2022-09-18 - 摘要：The design and synthesis of substituted polyacetylenes are motivated by the development of new materials that display interesting physical and chemical properties.Attachment of functional pendants to the polyacetylene backbone endows such polymers with various unique properties,such as optical nonlinearity,liquid crystallinity,light emission,helical chirality,high gas permeability,and so forth.As an important category of separation membrane materials,these amorphous,highly stiff, glassy polymers are characterized by high gas permeability and high vapor/gas selectivity,which is strikingly different from conventional glassy polymers.Much work is being progressed in the aspects of gas separation,natural gas purification,and enantioselective permeation of substituted polyacetylenes. This review concerns polymerization catalysts and polymer reaction for the synthesis of substituted polyacetylenes,especially separation properties of the highly permeable polyacetylenes.关键词：Substituted polyacetylene;Transition metal catalyst;Gas separation;Membrane
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发布时间：2022-09-18 - 摘要：Poly(lactic acid) has won the polymer industria'l's high favor due to its merits of excellent biocompatibility,biodegradability,high strength,workability and plasticity in recent years.But it also has the defects of brittleness,poor heat resistance and unstable degradation rate,for this reason its application is restricted and needs to be modified.Plant fiber developed rapidly in recent years because of the benefits of its low density,low cost,high specific strength and biodegradability.As the reinforcement,it can not only improve the properties of the materials,but also endows the composite with fully-biodegradability.The plant fiber reinforcing poly (lactic acid)(PLA) composite could be named "green composite" ,it represents an opportunity to partially ameliorate the environmental impacts and energy crisis.The recent researches of plant fiber reinforcing PLA composites were reviewed in this paper.Several pivotal questions were discussed in detail:improving of the interface, impact strength,heat resistance and processing method of the composites.The microfibrillited cellulose (MFC) reinforcing PLA nano-composites were also discussed.关键词：Plant fiber;PLA;Composite;Biodegradable
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发布时间：2022-09-18 - 摘要：In the past few decades, biodegradable polymers, especially aliphatic polyesters have been drawn much attention due to their potential applications in both biomedical materials and eco-materials. Some of aliphatic polyesters have been commercially available because of their excellent biocompatibility and biodegradability. As far as aliphatic polyesters are concerned, it is significant to develop the living polymerization methods to yield polyesters with defined chemical structure and exact molecular weight, for controlling their biodegradation rate, hydrophilicity, glass transition temperature and crystallinity. The first two sections of this review aim at reporting on the evolution of the initiators/catalytic systems, including traditional anionic and cationic ring-opening polymerization of lactones and lactides. In addition, the greener ways of controlled polymerization are addressed in detail, such as the use of enzyme as catalysts, ion liquid and supercritical CO2 as polymerization medium. In the last section, several strategies are discussed to obtain functional (co) polyesters of various architectures by preparing novel cyclic monomers.关键词：Aliphatic polyesters;Controlled polymerization;Biodeg radation
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发布时间：2022-09-18 - 摘要：Polymer Ion Conducting Membranes are the most important parts in fuel cells. Generally, polymer electrolyte membrane fuel cells include proton exchange membrane fuel cell (PEMFC) and alkaline polymer membrane fuel cells (APEFC ), according to the counter ions of polymers. In this article, we focus on the advance of PEM under high temperature and low humidity condition in fuel cell (HTPEM), and the alkaline polymer membranes (APE ) recently. Then the key issues and the prospects of HTPEM and APE are illustrated in fuel cells, and the research work in HTPEM and APE in our lab is introduced accordingly.关键词：Fuel cell;Poly(aryl ether ketone);Membrane;Conductivity;Stability
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发布时间：2022-09-18 - 摘要：Ring-opening metathesis polymerization(ROMP) of cycloolefins has become a research hotspot, among which the ROMP of dicyclopentadiene (DCPD) gains widespread interest recently due to the low cost, sufficient source and the excellent mechanical properties of polydicy clopentadiene (PDCPD). The mechanism of ROMP, the catalysts used in the ROMP of DCPD and the chemical structures of PDCPD were introduced, advances in PDCPD materials, the surface modification of PDCPD, PDCPD nanocopolymers and PDCPD self-healing (assembling ) materials were reviewed. Finally, future trends in PDCPD materials were forecasted.关键词：DCPD;ROMP;Polymerization mechanism;Catalyst system;PDCPD
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发布时间：2022-09-18 - 摘要：Chemical modification of pre-existing polymer materials by functional monomers has always been an object of great interest as it offers an effective route to address some low cost commodity shaped-materials to higher added value applications.With the aid of supercritical carbon dioxide,the monomers can be infused into the swollen polymer and polymerized to form heterogeneous polymer alloys.The development of the research on the bulk modification and grafting of polymer in supercritical CO2 is reviewed.In this paper,supercritical CO2-swelling polymerization techniques and (γ)-ray preirradiation-induced graft copolymerization are introduced.关键词：Supercritical CO2;Polymer;Bulk modification and grafting
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发布时间：2022-09-18 - 摘要：This paper reviewed the development of retarded anionic polymerization in the last decade, discussing the several generations of retarded anionic initiating systems of retarded mechanism, as well as in the anionic polymerization of styrene copolymer productions in the application. In addition, the application of retarded anionic polymerization technique for manufacturing high impact polystyrene of Germany BASF Company was also described briefly, the advantages of retarded anionic polymerization of reactivity controlled lead it to a broader space for development.关键词：Retarded anionic polymerization;Retarded mechanism;High impact polystyrene;Resin
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发布时间：2022-09-18 - 摘要：Heterogeneous chromium catalysts are widely used for the ethylene polymerization.The discovery of homogeneous model systems has substantially improved our understanding of the underlying organometallic chemistry and is fueling the current round of innovation hailed as "metallocene technology". Despite their commercial importance,chromium catalysts have inspired less modeling activity,owing possibly to the paramagnetism of relevant organometallic complexes.The potential for paramagnetic organochromium synthesis has brightened in recent years,in part due to technological advancements.The use of single-crystal X-ray diffraction method has dramatically decreased the measure difficulty of chromium complexes,to the point where X-ray structural determination has become almost mandatory for confirming the identity of all new paramagnetic products.The growing demand for high performance polyolefin products in recent years has inspired extensive industrial and academic interest to develop high performance novel homogeneous chromium catalysts.This paper summarizes the latest progresses in chromium based homogeneous catalysts and their application in olefin polymerization.关键词：Chromium complex;Olefin polymerization;Homogeneous catalysis
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发布时间：2022-09-18 - 摘要：Compared with traditional anticancer drug, nanoanticancer drug carrier has the advantage of long circulation in vito, targeted to the tumor organization, controlled release increased therapeutic effects and efficiency, reduced toxicity and good biocompatibility and biodegradability. Now scientists have successfully design and synthesize different kinds of anticancer drug carrier including the structures of nano-particle, nano-micelle and dendrimer. Different kinds of polyester, protein and polypeptides, which are all with good biocompatibility, can be used to prepare the drug carrier.关键词：Nanoanticancer durg carrier;Controlled release;Biocompatibility
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发布时间：2022-09-18
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