最新刊期
      卷 20 ， 期 12 ， 2007
      • Fang GU,Hai-jun WANG
        Vol. 20, Issue 12, Pages: 3-9(2007) DOI: 10.14028/j.cnki.1003-3726.2007.12.008
        摘要：This paper summarized the current experimental and theoretical progresses on the phenomenon of the translocation of single polymer chain from a nanopore located in a membrane. The related discussions are presented on the Mean First-Passage Time which is the interests in both the theories and experiments. In detail, the effects of some factors on the translocation were considered, which involved the thickness of the membrane, membrane curvature, the solvent effects, the configuration of the single polymer chain and the interaction between the polymer chains, and so on. Meanwhile, we also investigated the corresponding applications, and analysed the experimental results, analytical and simulative results proposed by a few research groups. The attempt was made to launch the research in related fields.  
        关键词：Single polymer chain;Nanopore;Mean first-passage time;Hydrogen-bonding   
        2
        |
        9
        |
        0
        <HTML>
        <L-PDF><Meta-XML>
        <引用本文> <批量引用> 29984436 false
        发布时间：2022-09-18
      • Wei WANG,Qi-yun DU
        Vol. 20, Issue 12, Pages: 10-16(2007) DOI: 10.14028/j.cnki.1003-3726.2007.12.009
        摘要：Nanofiltration membrane is one of separation membrane. Applications of nanofiltration membrane technology in food industry, drinking water and wastewater treatment, and so on, were reviewed. And studies of its application in organic solution were introduced briefly too.  
        关键词：Nanofiltration membrane;Membrane separation;Application   
        2
        |
        10
        |
        2
        <HTML>
        <L-PDF><Meta-XML>
        <引用本文> <批量引用> 29984426 false
        发布时间：2022-09-18
      • Jing WANG,Bo-chao ZHU,Jin-yong DONG,Jun-ji JIA
        Vol. 20, Issue 12, Pages: 17-23(2007) DOI: 10.14028/j.cnki.1003-3726.2007.12.003
        摘要：Progress on developing of ethylene oligomerization catalysts was reviewed. According to the atomic number of the carbon chain, the utilities of α-alkenes were briefly introduced. We categorized and discussed the details according to latter transition metal catalyst and former transition metal catalyst. Ethylene Trimerization catalyst was introduced in emphasis and its polymerization mechanism was proposed. The article finally introduced preparations methodsα-alkenes have besides ethylene oligomerization catalyst method, but also have paraffin wax hot decomposition, alkane catalysis decomposes, alkane dehydrogenation and alkene two molecular polymerization and so on. The linearization degreec, the polymerization degree distributes, the separation expense of the product and the product quality prepared by ethylene oligomerization are better than that of others. In China, the main production method is paraffin wax decomposition, therefore, it has the extremely vital significance that to develop the research of the ethylene oligomerization and the property rights oligomerization catalyst in our country.  
        关键词：Latter transition metal catalyst;Former transition metal catalyst;Oligomerization;Ethylene   
        2
        |
        9
        |
        4
        <HTML>
        <L-PDF><Meta-XML>
        <引用本文> <批量引用> 29984437 false
        发布时间：2022-09-18
      • Zu-bin LI,Dong-xia HUO,Hong-ying WANG
        Vol. 20, Issue 12, Pages: 24-28(2007) DOI: 10.14028/j.cnki.1003-3726.2007.12.001
        摘要：Intelligent Hydrogels exhibit reversible swelling behavior in response to external stimulation, such as temperature, pH, solvent, ionic strength, electric field, magnetic field, light, pressure, specific analyte, etc. Improving the characteristic of intelligent hydrogels by molecular imprinting technique, those hydrogels not only have the ability of environmental responsiveness, but also have the specialty of molecular recognition. Hence, the molecularly imprinted intelligent hydrogels can auto-recognize and bind/release the specific analyte in respons to the external stimuli, which has potential application in delivery of drug, biosensors and immune analyse. In this paper, the development of molecularly imprinted intelligent hydrogels is reviewed. The challenges and the research tendency are discussed.  
        关键词：Intelligent Hydrogels;Molecular imprinting;Sensitiveness-Responsiveness;Molecular recognition;Controlled release   
        2
        |
        10
        |
        1
        <HTML>
        <L-PDF><Meta-XML>
        <引用本文> <批量引用> 29984435 false
        发布时间：2022-09-18
      • Ying-hui HAN,Xin-wu BA,Yi ZHAO
        Vol. 20, Issue 12, Pages: 29-33(2007) DOI: 10.14028/j.cnki.1003-3726.2007.12.004
        摘要：There is a great deal active end group existing in hyperbranched polymer, which condensed phase structure will be transformed by virtue of modification and functionalization of active end group of hyperbranched polymer.The special structure and properties of hyperbranched polymer were introduced in this paper.The present investigation of the conformation and the condensed phase structure were summarized.Its molecular structure parameters were discussed systematically, including branching degree, molecularweight distribution, molecular size, glass transition temperature, intrinsic viscosity and so on.On these bases, physical chemistry properties and characterization were illustrated extensively.Furthermore, the article reviewed the contributions of worldwide scholars and made some predictions for the future developments and process of hyperbranched polymer.  
        关键词：Hyperbranched polymer;Conformation;Condensed phase;Characterization   
        2
        |
        10
        |
        1
        <HTML>
        <L-PDF><Meta-XML>
        <引用本文> <批量引用> 29984500 false
        发布时间：2022-09-18
      • Yan-bin BAI,Ai-ping ZHAO,Fa-kui GAO
        Vol. 20, Issue 12, Pages: 34-40(2007) DOI: 10.14028/j.cnki.1003-3726.2007.12.010
        摘要：Poly (lactic acid) and its copolymers, due to their non-toxic merit, favorable bio-compatibility and biodegradation, are suitable for many biomedical applications. This paper made a review on the application of poly (lactic acid) and its copolymers in controlled release and organ-targeted release.  
        关键词：Poly (lactic acid) and its copolymers;Drug-loading microsphere;Controlled release;Target   
        2
        |
        10
        |
        3
        <HTML>
        <L-PDF><Meta-XML>
        <引用本文> <批量引用> 29984494 false
        发布时间：2022-09-18
      • Shou-ping XU,Wei-qu LIU
        Vol. 20, Issue 12, Pages: 41-48(2007) DOI: 10.14028/j.cnki.1003-3726.2007.12.005
        摘要：Fluorinated polymers have high thermal stability, superb chemical resistance, excellent mechanical property, superior weather ability and high oil and water repellence.ATRP as a useful polymerization method can produce well-defined copolymers with various architectures (block, star, dendritic or graft)and with predictable molecular weights and narrow molecular weight distribution.When the method ATRP was applied in the preparation of fluorinated polymers, excellent properties may be achieved with a small content of fluorinated monomers.In this paper, progresses of ATRP in producing fluorinated polymers have been reviewed.  
        关键词：ATRP;Fluorinated acrylate;Review   
        2
        |
        9
        |
        2
        <HTML>
        <L-PDF><Meta-XML>
        <引用本文> <批量引用> 29984508 false
        发布时间：2022-09-18
      • Shi-ying ZHANG,Guan-zhong LU,Yun GUO
        Vol. 20, Issue 12, Pages: 49-55(2007) DOI: 10.14028/j.cnki.1003-3726.2007.12.002
        摘要：Polymer-supported chiral catalysts have broad applications in organic synthesis. The primary advantage is their ease of separation from the reaction mixture which allows very efficient recovery and reuse of the catalysts. When toxic or odorous reagents are attached to polymer supports, handling and processing of these chemicals becomes much safer and simpler. Moreover, the proper polymer may provide a respectively small space for asymmetric reaction, enhancing stereo-selectivity. So polymer-supported chiral catalysts have attracted more and more attention. Asymmetric Micheal reaction, an important carbon-carbon and carbon-hetero atom forming reaction, plays an essential role in organic synthesis and drug synthesis. In this paper, their application and the latest progress in Michael reaction were reviewed.  
        关键词：Chiral catalyst;Polymer-supported;Michael reaction   
        2
        |
        9
        |
        0
        <HTML>
        <L-PDF><Meta-XML>
        <引用本文> <批量引用> 29984509 false
        发布时间：2022-09-18
      • Yi-feng WANG,Wei XU
        Vol. 20, Issue 12, Pages: 56-60(2007) DOI: 10.14028/j.cnki.1003-3726.2007.12.011
        摘要：In this paper, the recent studies on the surface modification of biomedical polymer materials by polysaccharides such as dextran, heparin and chitosan have been introduced. Polysaccharide is the richest biomacromolecules in nature, which has good biocompatibility. It is noteworthy that many polysaccharides show significant bioactivities. Thus, more attention has been attracted towards the surface modification on biomedical polymer materials by polysaccharides. Many researches indicate that good biocompatibility and various excellent biomedical properties can be achieved after material surfaces are modified by bioactive polysaccharides.  
        关键词：Biomedical polymer materials;Polysaccharide;Surface modification;Biocompatibility   
        2
        |
        10
        |
        1
        <HTML>
        <L-PDF><Meta-XML>
        <引用本文> <批量引用> 29984507 false
        发布时间：2022-09-18
      • Xin SU,Yu-jun FENG,Zhi CHEN,Zhi-yong LU,Yu XIA
        Vol. 20, Issue 12, Pages: 61-66(2007) DOI: 10.14028/j.cnki.1003-3726.2007.12.006
        摘要：Water-soluble polymers have been widely used in industry, agriculture and medicine. However, novel techniques with structural controllability are demanded to meet the requirements for developing fine water-soluble polymers. Water-soluble polymers with controllable molecular weight and narrow molecular weight can be obtained from atomic transfer radical polymerization (ATRP) . Presented in this paper are the parameters influencing ATRP for preparing water-soluble polymers, such as monomer, initiator, catalyst, solvent, temperature and time, and detailed examples of water-soluble polymers, polyacrylate, polyacrylamide, derivatives of polystyrene and polyacrylate which were prepared by ATRP.  
        关键词：Water-soluble polymer;Living radical polymerization;ATRP;Controllable molecular weights   
        2
        |
        9
        |
        1
        <HTML>
        <L-PDF><Meta-XML>
        <引用本文> <批量引用> 29984543 false
        发布时间：2022-09-18
      • Ping-ping ZHU,Hai-yang YANG,Ping-sheng HE
        Vol. 20, Issue 12, Pages: 67-69(2007) DOI: 10.14028/j.cnki.1003-3726.2007.12.007
        摘要：The course "Experiments for Polymer Physics" has been selected into the 2006Anhui elaborate course. Associated with the experience of research of teaching and construction on elaborate course, a conception "three prompt introductions" of constructing textbook is sumed up. The meaning of the conception is also explained with practical examples in this paper.  
        关键词：Elaborate course;Construction of textbook;Experiments for polymer physics;Computer simulation experiment   
        2
        |
        12
        |
        1
        <HTML>
        <L-PDF><Meta-XML>
        <引用本文> <批量引用> 29984542 false
        发布时间：2022-09-18
      0