最新刊期
      卷 6 ， 期 1 ， 1993
      • Yuanyin Chen,Xueran Lu
        Vol. 6, Issue 1, Pages: 1-7(1993) DOI: 10.14028/j.cnki.1003-3726.1993.01.001
        摘要：Recently, crowns attached to silica, silica gel or polysiloxanes have been attracted much attention. This paper covers the development, synthesis, properties, application and recent research progress about the above mentioned materials and tries to describe the developing prospect of them.  
        关键词：Polysiloxane;polymeric crown ether;grafted -crown ether;chromatography;supported - complex catalyst   
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        发布时间：2022-09-18
      • Guoqing Yuan
        Vol. 6, Issue 1, Pages: 8-13(1993) DOI: 10.14028/j.cnki.1003-3726.1993.01.002
        摘要：A series of heterogenized rhodium complex catalysts for the carbnylation of methanol have been synthesized by the reaction of tetracarbonyldichloro - dirhodium with linear and cross - linked copolymers. These complexes were high catalytic in carbonylation of methanol to acetic acid and acetic anhydride. The active centers of these catalysts consist of (a) a cis - dicarbonyl rhodium moiety coordinated with the borderline base pyridine N and adjacent oxygen to form N→Rh and O→Rh coordination bond, respectively, and (b) the said moiety coordinated with two adjacent pyridine N's to form two N→Rh bonds. The former plays a more active role than the latter in catalysts. These catalysts are thermally stable. With methyl iodide as promoter,methanol in acetic acid could be carbonylated to acetic acid and acetic anhydrine simultaneously as final products with a turnover rate at 104 moles methanol converted/(mol Rh • h-1).  
        关键词：Methanol;Carbonylation;Complex   
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        发布时间：2022-09-18
      • Jian Zhang,Xiaohuai Hou
        Vol. 6, Issue 1, Pages: 14-19,13(1993) DOI: 10.14028/j.cnki.1003-3726.1993.01.003
        摘要：The data of silicon rubber and polyimide permselectivity and divide gas penetratic processes into two programs: Diffusion and Solubility, this paper discussed about chemical structure's influence on permselectivity in polymeric gas separation membrane, such factors as chemical comprise; polymer backbone mobility; bukyl functional group and polymer crystalinazition. More over,it reviewed the history of polymeric gas separation membrane and development of foundmental theory.  
        关键词：Polymeric gas separation membrane;Gas permeability;Gas selectivity;Silicon rubber;Polyimide   
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        发布时间：2022-09-18
      • Guangxue Xu,Zejian Lu,Shangan Lin
        Vol. 6, Issue 1, Pages: 20-28(1993) DOI: 10.14028/j.cnki.1003-3726.1993.01.004
        摘要：As a kind of functional materials of potential application, stereoregular styrene polymers have been widely studied. The review with 105 refs. (to July 1991) discussed synthetic methods, polymeric catalysts, polymerization mechanism, kinetics and development of stereoregular polystyrene.  
        关键词：Isotactic polystyrene;Syndiotactic polystyrene;Styrene;Ziegler - Natta catalyst;Coordination polymerization   
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        发布时间：2022-09-18
      • Weisheng Zhang
        Vol. 6, Issue 1, Pages: 29-33(1993) DOI: 10.14028/j.cnki.1003-3726.1993.01.005
        摘要：Living Polymerization by radical mechanism is a new type of reaction which has been explored recently. In this paper, the developments of these reactions are reviewed.  
        关键词：Living polymerization;Radical polymerization;Species;Free radical   
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        发布时间：2022-09-18
      • Fuqiang Zhang
        Vol. 6, Issue 1, Pages: 34-42(1993) DOI: 10.14028/j.cnki.1003-3726.1993.01.006
        摘要：A new type functional materials, referred to as shape memory polymer (SMP), possess the advantages of large deformation, low price, light mass, rich variety, good processability, convenient to deform and easy to regulate shape recovery temperature. According to the shape memory way, SMP may be thermostimulative, Photostimulative chemical stimulative and so on, and they can meet different application.  
        关键词：Functional polymer materials;Shape memory materials;Shape memory plas-   
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        发布时间：2022-09-18
      • Xiang Liu,Zaizhang Yu,Zuren Pan
        Vol. 6, Issue 1, Pages: 43-48,7(1993) DOI: 10.14028/j.cnki.1003-3726.1993.01.007
        摘要：In this paper, The polymerization processes, structure, properties and new grades of ABS resins were reviewed from 50 references. After a brief a introduction to rubber toughened polstyrene series, especially ABS, the emulsion, bulk - suspension and continueous bulk polymerization processes for manufacturing ABS were described and evaluated firstly. Thereafter,the effects of the ratios of three components, the particle size of rubber and graft degree on high-impact, heat-resistant, transpant,frame-resistant and electroplating properties were discussed. Finally, various types and grades of ABS resins, its manufacturing key factors and applications were introduced.  
        关键词：ABS resins;Styrene;Acrilonitrile;Butadiene   
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