最新刊期
      卷 14 ， 期 3 ， 2001
      • Jin-gang LIU,Min-hui HE,Fu-song WANG,Shi-yong YANG
        Vol. 14, Issue 3, Pages: 1-8(2001) DOI: 10.14028/j.cnki.1003-3726.2001.03.001
        摘要：Recent progress in the research of alicyclic polyimides was reviewed.The classification and synthesis of the alicyclic monomers were discussed.At the same time,the synthesis chemistry and characterization of the part-and whole-alicyclic polyimides were described.Especially,the particularity in the synthesis of the whole-alicyclic was presented.As an important material used widely in the alignment of the liquid crystals,alicyclic polyimides were paid more and more attention in recent years.Therefore,the emphasis was placed on the applications of the alicyclic polyimides as liquid crystal display (LCD) alignment films.  
        关键词：Polyimide;Alicyclic monomers;Liquid crystal display;Alignment film   
        4
        |
        9
        |
        9
        <HTML>
        <L-PDF><Meta-XML>
        <引用本文> <批量引用> 30005006 false
        发布时间：2022-09-18
      • Yan PAN,Wei-wen FU,Feng XUE
        Vol. 14, Issue 3, Pages: 9-15,42(2001) DOI: 10.14028/j.cnki.1003-3726.2001.03.002
        摘要：The research and development of polymer-polymer complex in solution was reviewed.On one hand,the experimental methods to study polymer-polymer complex in solution were summarized;on the other hand,the complex systems were classified according to the different driving forces:Coulomb attraction,Van der Waals attraction,Hydrogen bond interaction,antigen-antibody interaction,ion interaction.And the influencing factors of each kind of complex system were discussed.  
        关键词：Complex;Polymer;Solution   
        2
        |
        8
        |
        1
        <HTML>
        <L-PDF><Meta-XML>
        <引用本文> <批量引用> 30005004 false
        发布时间：2022-09-18
      • Shan-feng WANG,Ping-ping WU,Zhe-wen HAN
        Vol. 14, Issue 3, Pages: 16-23(2001) DOI: 10.14028/j.cnki.1003-3726.2001.03.003
        摘要：Polybenzazoles (PBZs) stand for a series of aromatic stiff chain liquid crystalline polymers, which have outstanding properties characterized as high-strength,high-modulus,high thermal resistance and good environment stability.In this part,the recent studies on such polymers were reviewed mainly on their general structures,properties and chemical modification.  
        关键词：Poly (benzazole);π-conjugated polymer;Chemical modification   
        2
        |
        7
        |
        4
        <HTML>
        <L-PDF><Meta-XML>
        <引用本文> <批量引用> 30005003 false
        发布时间：2022-09-18
      • Ye-hai YAN,Tong ZHAO,Yun-zhao YU
        Vol. 14, Issue 3, Pages: 24-35(2001) DOI: 10.14028/j.cnki.1003-3726.2001.03.004
        摘要：In this paper,the principle of Resin Transfer Molding (RTM) technology for composite processing is introduced,and the requirement of the resins for RTM is discussed.Advanced polymers developed for RTM are reviewed with the emphasis on their performance and commercial applications.  
        关键词：Composite material;Resin transfer molding;Advanced polymers   
        2
        |
        8
        |
        3
        <HTML>
        <L-PDF><Meta-XML>
        <引用本文> <批量引用> 30005002 false
        发布时间：2022-09-18
      • Chong-li ZHONG,Jing-tao HE
        Vol. 14, Issue 3, Pages: 36-42(2001) DOI: 10.14028/j.cnki.1003-3726.2001.03.005
        摘要：Three representative activity coefficient models were compared for the calculation of the thermodynamic factor relating self-to mutual-diffusion coefficients of polymer solutions using the experimental data of40polymer solution systems.The calculated results show that the three models have similar accuracy,and the AADs are around20%.This work shows a potential problem in the calculation of mutual-diffusion coefficients from self-diffusion coefficients,that is,the big uncertainty caused by the calculation of the thermodynamic factor with an activity coefficient model.  
        关键词：Polymer solution;Diffusion coefficient;Activity coefficient   
        2
        |
        8
        |
        1
        <HTML>
        <L-PDF><Meta-XML>
        <引用本文> <批量引用> 30005000 false
        发布时间：2022-09-18
      • Guang-fo HUANG,Sheng-bo QING,Sheng-biao LI,Shi-qiang HUANG
        Vol. 14, Issue 3, Pages: 43-49(2001) DOI: 10.14028/j.cnki.1003-3726.2001.03.006
        摘要：The preparations and the structures and the properties of chitin and chitosan are introduced, and the applications in immobilization and flocculant and drug delivery system and so on are discussed.  
        关键词：Polysaccharide;Biomedical materials;Chitin;Chitosan   
        2
        |
        8
        |
        11
        <HTML>
        <L-PDF><Meta-XML>
        <引用本文> <批量引用> 30005070 false
        发布时间：2022-09-18
      • Chun-yan SUN,Wei CHEN,Wei LIU,Zhen-hua JING
        Vol. 14, Issue 3, Pages: 50-56(2001) DOI: 10.14028/j.cnki.1003-3726.2001.03.007
        摘要：The progress of study on syndiotactic polypropylene (sPP) was reviewed, including syndiospecific metallocene catalyst, properties and application of sPP .The effect of metallocene catalyst on the syndiotactity and crystalization was discussed .The analytical results showed that the application perspective of sPP was good becuause of its execllent properties in transmittance and impact stress .It was emphasized that study on supporting metallocene and processability of sPP was necessary for commerical production of sPP .  
        关键词：Syndiotactic polypropylene;Metallocene catalyst;Structure;Properties   
        2
        |
        8
        |
        1
        <HTML>
        <L-PDF><Meta-XML>
        <引用本文> <批量引用> 30005080 false
        发布时间：2022-09-18
      • Tong PU,Zuo-xiang ZENG
        Vol. 14, Issue 3, Pages: 57-63(2001) DOI: 10.14028/j.cnki.1003-3726.2001.03.008
        摘要：Nanofiltration (NF) is a novel type of pressure-driven filtration process with membranes whose molecular weight cut-off (MWCO) lie between reverse osmosis membranes and ultrafiltration membranes,i.e. range between200and 1000g/mol,and NF membranes have nanopore radius (10-9m), so the selection of membranes material and preparation technique become the key to manufacture NF membranes with high properties. In this paper,several of main preparation techniques of polymeric NF membranes including L-S phase separation way,transition way,co-blending way,charging way and composite way were introduced,the research on the material,preparation methods of polymeric nanofiltration membranes and its performance and application in recent years were also reviewed.  
        关键词：Nanofiltration membrane;Polymeric membrane;Membrane material;Membrane preparation technique   
        2
        |
        7
        |
        1
        <HTML>
        <L-PDF><Meta-XML>
        <引用本文> <批量引用> 30005079 false
        发布时间：2022-09-18
      • Chan-jie JIANG,Chun-yue PAN,Ke-long HUANG
        Vol. 14, Issue 3, Pages: 64-69(2001) DOI: 10.14028/j.cnki.1003-3726.2001.03.009
        摘要：The homopolymer and the copolymer of acrylic acid and acrylamide is very useful and important. Some main properties,such as:rheological property and degradation,and the development of the research of this copolymer are reviewed here.Further more,the methods of their synthesis using mainly four techniques: hydrolization,aqueous solution polymerization,inverse emulsion polymerization and inverse suspension polymerition  
        关键词：Acrylic acid;Acrylamide;Hydrolization;Aqueous solution polymerization;Inverse emulsion polymerization;Inverse suspension polymerization   
        2
        |
        8
        |
        5
        <HTML>
        <L-PDF><Meta-XML>
        <引用本文> <批量引用> 30005081 false
        发布时间：2022-09-18
      • Yong XIN,He-sheng LIU,Guo-tai YANG,Cheng-hong HE
        Vol. 14, Issue 3, Pages: 70-74(2001) DOI: 10.14028/j.cnki.1003-3726.2001.03.010
        摘要：Factors and relation of skin melt formation under isothermal condition have been analyzed during gas-assisted injection molding in a tube.This research shows that thickness ratio of skin melt is about0.3 which is close to the experimental values 0.34~0.37,and that the ratio value (<0.3) of non-Newtonian fluid is less than the value0.38of gas-assisted injection molding.The difference factors are analyzed under nonisothermal condition,which shows that shear stress at the gas/melt interface and the pressure gradients existing at the gas and melt fronts are two very important contributing factors forming skin melt thickness in addition to melt temperature,mold temperature and gas delay time,which were recognized as the important influence parameters on the skin melt formation.  
        关键词：Gas-assisted injection molding;Skin melt formation;Pressure gradient   
        2
        |
        6
        |
        1
        <HTML>
        <L-PDF><Meta-XML>
        <引用本文> <批量引用> 30005083 false
        发布时间：2022-09-18
      • Li WANG,Jian-guo CHENG,Jie PAN,Lin-xian FENG
        Vol. 14, Issue 3, Pages: 75-81(2001) DOI: 10.14028/j.cnki.1003-3726.2001.03.011
        摘要：This article reviews the recent development of ferrocenly star and dendritic poly (metallocenes)  
        关键词：Star;Dendritic;Ferrocenly;Poly (metallocenes)   
        2
        |
        8
        |
        2
        <HTML>
        <L-PDF><Meta-XML>
        <引用本文> <批量引用> 30005099 false
        发布时间：2022-09-18
      0