最新刊期
      卷 22 ， 期 6 ， 2009
      • An-qi ZHANG,Lei YING,Hong-bin WU,Wei YANG,Yong CAO
        Vol. 22, Issue 6, Pages: 1-12(2009) DOI: 10.14028/j.cnki.1003-3726.2009.06.010
        摘要：Organic/polymer light-emitting diodes (O/PLEDs) are considered as one of the most potential and promising technologies in the 21st century due to their excellent characteristics including low energy consumption,wide visual view,colorful,fast response,environment friendly and the capability of being fabricated to flexible screen. White polymer light-emitting diodes (WPLEDs) have been attracting considerable attention due to their potential applications in large-area flat panel displays and solid-state lighting because they can be easily fabricated using wet processes,including the spin-coating,screen printing,and ink-jet printing techniques,which are expected to be lower in cost in mass production.In this paper,the domestic research progress on white-light-emitting-polymers and polymer white light-emitting diodes were introduced from two aspects.Besides,the application of this kind of diodes and the future of this research field as well as some questions which needed to be solved urgently were also discussed in detail.  
        关键词：Electroluminescence;White light-emitting polymer;White light-emitting device   
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        发布时间：2022-09-18
      • Chi-fei WU,Hai-yan MOU,Fei SHEN,Wei-hong GUO,Xiao-fang YUAN
        Vol. 22, Issue 6, Pages: 13-21(2009) DOI: 10.14028/j.cnki.1003-3726.2009.06.002
        摘要：By incorporating inorganic metal salts particles into nitrile butadiene rubber (NBR) ,a novel vulcanization method was developed through the coordination reaction between the nitrile group (-CN) and metal ions in solid phase.A new non-covalent coordination crosslinking network system was established,which totally differs from traditional sulfur vulcanization approaches.Further more,the coordinated rubber materials were with excellent mechanical properties,which can be employed as flexible rubber materials as well as brittle or tough plastic materials. Two leading influencing factors of the coordination reaction,diameters of metal salts particles and acrylonitrile contents,were discussed in this paper.Some ways to improve the efficiency of coordination vulcanization were presented,such as adding crystal water and plasticizers etc.  
        关键词：Non-covalent bonding;Metal coordination;Vulcanization;Rubber   
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        发布时间：2022-09-18
      • Jun CAI,Zhen YANG,Dong LV,Dao ZHOU,Bi-feng CHEN,Hu YANG,Xue-feng GUO,Wei-ping DING,Rong-shi CHENG
        Vol. 22, Issue 6, Pages: 22-30(2009) DOI: 10.14028/j.cnki.1003-3726.2009.06.001
        摘要：Magnesium hydroxide as a kind of halogen-free flame retardant fillers for polymers has been paid more attention for the expectation of superior properties.Consideration of the morphology effect on the flame retardant properties,the preparation of magnesium hydroxide with different morphologies by solution precipitation methods has been reviewed in this article,and some new surface modification methods of magnesium hydroxide for better compatibility with polymers have been also summarized.  
        关键词：Magnesium hydroxide;Flame Retardants;Preparation;Surface modification   
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        发布时间：2022-09-18
      • Lei CHEN,Wei ZHANG,Hua-gang NI,Xin-ping WANG
        Vol. 22, Issue 6, Pages: 31-37(2009) DOI: 10.14028/j.cnki.1003-3726.2009.06.008
        摘要：Fluorinated acrylate latices have been widely used in the field of coatings, adhesives, chemical auxiliaries for textile due to their excellent surface properties .However, the fluorinated monomers have relatively high price, and also, the residual emulsifiers in the latex films have negative effects on the water/oil repellency of films . Therefore, it is of great importance to reduce fluorinated component content in copolymers while keeping the excellent surface properties of the resulting latex films .This paper reviews the methods of improving the surface properties of fluorinated acrylate latex films, including the efficient utilization of fluorinated monomers, the design of latex particles, chain structures of copolymer, and the post-treatment of latex films resulted from fluorinated acrylate copolymer .  
        关键词：Fluorinated acrylate copolymer;Emulsion polymerization;Optimization of surface properties;Design of latex particle structures;Post-treatment of latex films   
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        发布时间：2022-09-18
      • Cong XUE,Ying-ying HU,Zheng-ming HUANG
        Vol. 22, Issue 6, Pages: 38-47(2009) DOI: 10.14028/j.cnki.1003-3726.2009.06.003
        摘要：Due to tiny diameter , big specific surface area , and ability to achieve surface functionalization easily , nanofibers are attracting great attentions world widely .Electropinning is an effective method to produce continuous nanofibers , whereas more advanced coxial-electrospinning technique can be used to fabricate core-shell composite nanofibers.In this review article , the fundamental issues with electrospinning based on electrohydrodynamics are addressed .Special attention is paid to recent studies on mechanism of coaxial electrospinning .Disucssions are made on Taylor cone , two-phase flow patterns , flow instabilities , non-Newtonian properties of polymer liquids , and stratified non-Newtonian fluid flows .Several untouched matters are mentioned as well.  
        关键词：Electrospinning;Hydrokinetics;Non-Newtonian fluid;Two-phase flow   
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        发布时间：2022-09-18
      • Hong-tao LIU,Wei-lin XU,Jing-jing HUANG,Dan-ying ZUO,Gui-zhen KE
        Vol. 22, Issue 6, Pages: 48-53(2009) DOI: 10.14028/j.cnki.1003-3726.2009.06.009
        摘要：Researches on developing technology of appearance-like and shape-like silk fibers were reviewed,the internal and international state-of-arts of synthetic polymeric fibers with silk fibroin-inspired structure and function were analysed especially,and the routes,methods and difficulties in producing silk-like and synthetic silk-inspired polymeric fibers were also disscussed.The contents include regeneration of silk fibroin,synthesis of poly (amino acid) ,synthesis of poly (amino acid) /non-peptide segment copolymer,synthesis of gene-engineered silk fibroininspired protein and their spinning processing.Based on the similarities in chemical structure (imido links) and molecular architecture (microphase separation) of native silk fibroin and synthetic polyurethane,the feasibility of producing silk-inspired polyurethane biofibers containing featured oligopeptide links was conceived to develop manmade silk fiber.  
        关键词：Silk fibroin;Silk-like fiber;Polyurethane;Biofiber   
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        发布时间：2022-09-18
      • Lei XIONG,Zhi-wei DENG,Guang-shun CHEN,Shao-yun GUO
        Vol. 22, Issue 6, Pages: 54-58(2009) DOI: 10.14028/j.cnki.1003-3726.2009.06.004
        摘要：In this paper,a kind of α-Methyl-styrene-acrylonitrile (α-MSAN) with 30% acrylonitrile (AN) content was used as a heat resistant modifier to prepare PVC/α-MSAN blends.The miscibility of PVC/α-MSAN blends was investigated by SEM,DSC,DMA and transmittance tests.It was found that α-MSAN is miscible with PVC even at 60% (wt) content of α-MSAN in these blends.The molecular structure of α-MSAN and the additional intermolecular interaction between α-hydrogen of PVC and AN of α-MSAN have accounted for the miscibility improvement of this blend system.For PVC/α-MSAN blends,with an increase of α-MSAN content,the VST and tensile strength increase,the impact strength and thermal stability decrease.The mechanism of the effects of α-MSAN on the mechanical and thermal stable properties is proposed.  
        关键词：PVC;α-Methyl-styrene-acrylonitrile;miscibility;Vicat soften temperature   
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        发布时间：2022-09-18
      • Yong LIU,Yu-zi JIN
        Vol. 22, Issue 6, Pages: 59-67(2009) DOI: 10.14028/j.cnki.1003-3726.2009.06.005
        摘要：Recent developments in the field of controlled/living radical polymerization (CRP) is the presentation of reversible addition-fragmentation chain transfer (RAFT) radical polymerization .Now it has evolved into a powerful synthetic tool for polymerization .RAFT technic ,with respect to reaction conditions and monomer class , not only can be applied in the synthesis of well defined homo-, gradient , diblock , triblock , star polymers as well as more complex architectures including microgels and polymer brushes , but also can be used in modification of material surfaces .This review traces of the research progress of application of RAFT living radical polymerization .  
        关键词：Controlled/living radical polymerization;Reversible addition-fragmentation chain transfer (RAFT);Molecular design   
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        发布时间：2022-09-18
      • Tao YU,Zhong LI,Guang-miao QU,Huo-xin LUAN,Cui YANG,Wei TONG,Wei DING
        Vol. 22, Issue 6, Pages: 68-74(2009) DOI: 10.14028/j.cnki.1003-3726.2009.06.006
        摘要：Acrylamide-based polymers are one of the important water-soluble polymers,with excellent thickening, flocculation,and moisture absorption properties.This paper has provided a comprehensive summary on research for preparation of acrylamide-based polymers,involving aqueous solution polymerization,dispersion polymerization,inverse suspension polymerization,inverse microemulsion polymerization,micellar copolymerization,aqueous two-phase polymerization,template polymerization,polymerization in supercritical CO2 fluid,polymerization in room temperature ionic liquids and controlled/living free radical polymerization,and briefly reviewed respective characteristics of various synthesis methods.Inverse microemulsion polymerization,polymerization in room temperature ionic liquids and controlled/living free radical polymerization were considered to be superior to others.The development prospect for acrylamide-based polymers has also been made.  
        关键词：Acrylamide;Acrylamide-based polymers;Polymerization;Preparation   
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        发布时间：2022-09-18
      • Feng WANG,Lin REN,Bin TONG
        Vol. 22, Issue 6, Pages: 75-78(2009) DOI: 10.14028/j.cnki.1003-3726.2009.06.007
        摘要：Polymerization reaction can be classfied to step-polymerization and chain-polymerization according to the polymerization mechanism.For difference of the active center , chain-polymerization is divided into free-radical polymerization and ion polymerization .Ion polymerization is including cationic polymerization 、anionic polymerization and coordination complex polymerization .In this paper , equations of "polymerization degree" ( Xn) in the course of "polymer chemistry" have been discussed detailed baseed on the clue of different mechanisms of of free radical polymerization 、ionic polymerization 、coordination polymerization and step polymerization .It aims at to improve students understand of key points of the course "polymer chemistry" and of the sigenificence of these equations of the ( Xn) .  
        关键词：Polymer chemistry;Equations of polymerization degree;Polymerization mechanisms   
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        发布时间：2022-09-18
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