最新刊期
      卷 0 ， 期 0 ， 2020
      • Ling YE,Wei GU,Yu-lan ZHOU
        Vol. 15, Issue 4, Pages: 1-5(2002) DOI: 10.14028/j.cnki.1003-3726.2002.04.001
        摘要：Polyamidoamine(PAMAM) dendrimers are a class of new nanoscale dendritic macromolecules, they are synthesized by reiterative Michale addition and amidation reactions.Their structure and molecular weight can be accurately controlled.Therefore, these unique features have made their potential applications in many areas.This review is emphasis on PAMAM dendrimers' advances in applications especially in medicine such as gene carriers, drug delivery, MRI and BNCT.  
        关键词：Polyamidoamine;Dendrimers;Drug delivery   
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        发布时间：2022-09-18
      • Bao-qing SHENTU,Zhi-xue WENG
        Vol. 15, Issue 4, Pages: 6-11(2002) DOI: 10.14028/j.cnki.1003-3726.2002.04.002
        摘要：Facilitated oxygen transport in polymer-cobaltporphyrin membranes was reviewed in this paper. The structure and oxygen-binding properties of cobaltporphyrin, facilitated oxygen transport in polymer-cobaltporphyrin membranes, factors affecting oxygen permeability, and mechanism of irreversible oxidation reactions of cobaltporphyrin were described.  
        关键词：Polymer;Cobaltporphyrin;Facilitated oxygen transport;Membrane;Carrier   
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        发布时间：2022-09-18
      • Han-xiong HUANG
        Vol. 15, Issue 4, Pages: 12-17(2002) DOI: 10.14028/j.cnki.1003-3726.2002.04.003
        摘要：The plastics extrusion blow nolding process consists of three stages,i. e. ,parison formation parison inflation,and part cooling. In this paper,the mechanism of these three stages was studied using different methods. Neural network method was used to investigate the parison swell affected by the die temperature and extrusion flow rate. The comparison of the experimentally determined parison swell of high density polyethylene with the predicted ones using the neural network model showed very agreement between the two. The parison swell can be predicted at different processing conditions from the neural network model. A mathematical model based on the thin membrane approximation and neo-Hookean constitutive relations was used to describe the parison free inflation. The instantaneous images of parison inflation within a mold cavity were obtained by employing a video capture technique. The theoretically predicted parison growth profiles are found to be in good agreement with the experimental measurements. Based on the ANSYS finite element software,three-dimensional cooling of blow molded part was investigated. The transient temperature profiles at various locations across the thickness of part can be predicted. The influence of the major operating variables,part thickness,and the thermal properties of plastics and mold materials on the cooling of parts can also be predicted.  
        关键词：Plastics;Extrusion blow molding;Parison swell;Parison inflation;Part cooling;Neural network method;Finite element method   
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        发布时间：2022-09-18
      • Wei-feng HOU,Jun-quan SUN
        Vol. 15, Issue 4, Pages: 18-25,40(2002) DOI: 10.14028/j.cnki.1003-3726.2002.04.004
        摘要：New development of bridged metallocene catalysts for ethylene polymerization, α-olefin polymerization and ethylene α-olefin copolymerization was reviewed.Our review will foculs our attention on the effect of the nature of bridges.  
        关键词：Bridged metallocene catalysts:Olefin polymerization;The nature of bridge and the performance of catalysis;Ge Sn B P N O bridge   
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        发布时间：2022-09-18
      • Jia-guo YAN,Hui LIANG,Jiang LU
        Vol. 15, Issue 4, Pages: 26-31,F3(2002) DOI: 10.14028/j.cnki.1003-3726.2002.04.005
        摘要：In this paper, the authors reviewed the studies on the circularly polarized luminescent polymers in the recent years.Firstly, two techniques for the investigation of chiropotical properties, circular dichroism (CD) and circular polarization of luminescence(CPL), were introduced.And, three types of circularly polarized luminescent polymers were mainly reviewed, including polythiophenes, polyphenylenevinylenes and polyfluorenes.In the end, the authors proposed three possible ways to obtain highly circularly polarized luminescent polymers.  
        关键词：Circularly polarized luminescent polymers;Chiroptical properties   
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        发布时间：2022-09-18
      • Ming-gang ZHU,Qi-zhen ZHANG,Zhao-sheng HOU
        Vol. 15, Issue 4, Pages: 32-40(2002) DOI: 10.14028/j.cnki.1003-3726.2002.04.006
        摘要：The sythetic methods and the sythetic mechanicisms of dendritic polymers were reviewed, and some new developments in this respect were introduced.  
        关键词：Dendrtic polymer;Hyperbranched polymer;Dendrimer;Synthetic method   
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        发布时间：2022-09-18
      • Yun CHEN,Hong-yan WANG
        Vol. 15, Issue 4, Pages: 41-46,60(2002) DOI: 10.14028/j.cnki.1003-3726.2002.04.007
        摘要：In this paper, the concept of fractal and the definitions and calculations of fractal dimensions are introduced.The recent applications of the fractal theory in polymer science, whichmainly include polymer solutions, wears and fractures of polymer materials and their interfaces, crystallization of polymers as well as conducting polymers, are discussed.  
        关键词：Fractal;Fractal dimensions;Polymer;Application   
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        发布时间：2022-09-18
      • Xian-ling SONG,Qi-biao WEN,Ye GUO
        Vol. 15, Issue 4, Pages: 47-52,60(2002) DOI: 10.14028/j.cnki.1003-3726.2002.04.008
        摘要：Functional cellulosics are all along researching focus. Many new functional cellulosics have been producted recent year. This thesis summaries the latest development and application of the functional cellulosics, including high absorbent cellulosics, biodegradation cellulosics, liquidcrystal cellulosics, high performance cellulosics.  
        关键词：Cellulose;Functional cellulosics;High absorbent cellulosics;Cellulosic liquid-crystal   
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        发布时间：2022-09-18
      • Jun YANG,Xiao-jing LV,Di-zhen Wang
        Vol. 15, Issue 4, Pages: 53-60(2002) DOI: 10.14028/j.cnki.1003-3726.2002.04.009
        摘要：The development of lignin applied in plastics in recent 10 years was reviewed by 51 reference, five fields include PVC, PE, PP, PF, and PU were analysed mainly. The development direction of this technology was also discussed.  
        关键词：Lignin;Plastics;Blending;Biodegradation;Composite   
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        发布时间：2022-09-18
      • Jin WANG,Shang-an LIN
        Vol. 15, Issue 4, Pages: 61-66(2002) DOI: 10.14028/j.cnki.1003-3726.2002.04.010
        摘要：Syndiotactic polystyrene (sPS) is a newly crystal engineer plastics. Compared with atactic polystyrene, it has perfect properties, such as high thermal resistance temperature, high crystallization velocity and chemical resistance. So the research on sPS has carried out recently. In this paper, structure, properties and chemical modification methods were discussed, which including the introduction of functional group (sulfonation, halogenation, maleic anhydridition) to molecular chain of sPS, copolymerization of sPS with other olefin monomers.  
        关键词：Syndiotactic polystyrene (sPS);Sulfonation;Maleic anhydridition   
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        发布时间：2022-09-18
      • Bo-chao ZHU,Qiang HUANG,Ning-ning JIAO
        Vol. 15, Issue 4, Pages: 67-76(2002) DOI: 10.14028/j.cnki.1003-3726.2002.04.011
        摘要：Several important development stages of polyolefin catalyst near fifty years were reviewed with 10 references.The components and characters of Ziegler-Natta catalyst, metallocene catalyst and non-metallocene complex catalyst were discussed.The countermeasures for developing polyolefin catalyst in China were proposed.  
        关键词：Ziegler-Natta catalyst;Metallocene catalyst;Non-metallocene catalyst;Polyolefins   
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        发布时间：2022-09-18
      • Zi-yong ZHANG
        Vol. 15, Issue 4, Pages: 77-80,F3(2002) DOI: 10.14028/j.cnki.1003-3726.2002.04.012
        摘要：Radical chain polymerization is an important content to study the course of "Polymer Chemistry". There are three significant scientific concepts, kinetic chain length and number-average degree of polymerization and radical life, in the chapter of the radical chain polymerization. A clear understanding for the quantitative relationship among them will conduce to study of the radical chain polymerization knowledge. These contents are discussed in this article.  
        关键词：Kinetic chain length;Number-average degree of polymerization;Radical life   
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        发布时间：2022-09-18
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