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      卷 0 ， 期 0 ， 2020
      • Shiyuan Cheng,Jianzong Li,Qingxu Ji
        Vol. 4, Issue 3, Pages: 129-137(1991) DOI: 10.14028/j.cnki.1003-3726.1991.03.001
        摘要：The nucleation and growth mechanisms of soap-free emulsion polymerization. methods to prepare soap-free emulsion, structure and property of latex partides, as well as the progresses in soap-free emulsion polymerization technology were reviewed.  
        关键词：Soap-free emulsion poly merization;Homogenous precipitation;Oligomeric micellar;Two-stage shot growth process   
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        发布时间：2022-09-18
      • Yuesheng Li,Mengxian Ding,Jiping Xu
        Vol. 4, Issue 3, Pages: 138-146(1991) DOI: 10.14028/j.cnki.1003-3726.1991.03.002
        摘要：Recent advance of polyimide membrane for gas separation was reviewed. The relationship between the permeability for various gases and the structure of polyimides, the composition of the co-polyimides, crosslinking and the history of the membrane has been discussed.  
        关键词：Gas separation;Polyimide;Membrane   
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        发布时间：2022-09-18
      • Yuanliang Wang
        Vol. 4, Issue 3, Pages: 147-152(1991) DOI: 10.14028/j.cnki.1003-3726.1991.03.003
        摘要：With the progress of polymer science for much more theories the explanation of polymeric properties is sought out. This paper gives a introduction to density-functional theory which is pending further perfection but have many advantages, and has a review of applications of this theory to study of polymeric structures and properties. It is notice. however, that this subject has been just beginning. So many courses will be to study on.  
        关键词：Density-Functional Theory;Polymer;Chemical Physics   
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        发布时间：2022-09-18
      • Runshan Liu
        Vol. 4, Issue 3, Pages: 153-159,192(1991) DOI: 10.14028/j.cnki.1003-3726.1991.03.005
        摘要：This paper has been written to revirw for toughening bismaleimides. The recent advancemet of bismaleimide resin systems with improved toughness is summarized. The methods for toughening bismaleimide such as rubber toughening of bismaleimide, copolymerizing with allylphenyl compounds, Michael addition chain extension, taking thermoplastics as toughening modifiers, using bismaleimide-modified epoxy resins and synthesizing chain-extended bismaleimide are reviewed.  
        关键词：Toughened bismaleimide resins;Development   
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        发布时间：2022-09-18
      • Qifeng Zhou
        Vol. 4, Issue 3, Pages: 160-162(1991) DOI: 10.14028/j.cnki.1003-3726.1991.03.006
        摘要：The concepts, "rigid side chain liquid crystal polymers" and "liquid crystal polymers with two-dimensional mesogenic units"are proposed. The former is used to distinguish the formerly proposed mesogen-jacketed liquid crystal polymers from the conventional comb-like side chain lops which are in principle flexible. The latter is proposed to describe liquid crystal polymers with two-dimensional mesogenic units and to guide the molecular design and synthesis of high performance lcps with both good tensile and compressive properties and with less anisotropy in physical properties.  
        关键词：Rigid side chain liquid crystal polymers;Liquid crystal polymers with two-dimensional mesogenic units   
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        发布时间：2022-09-18
      • Hongbing Jia,Zaizhang Yu,Bogeng Li,Zuren Pan
        Vol. 4, Issue 3, Pages: 163-168(1991) DOI: 10.14028/j.cnki.1003-3726.1991.03.007
        摘要：In this paper, the preparation and properties of vinylidene chloride (VDC) copolymer used in barrier coating are reviewed. The ways to improve the quality of VDC copolymer latex are put forward.  
        关键词：High barrier materials;Vinylidene chloride;Emulsion poly-merization   
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        发布时间：2022-09-18
      • Shenyi Tong
        Vol. 4, Issue 3, Pages: 169-175(1991) DOI: 10.14028/j.cnki.1003-3726.1991.03.008
        摘要：Polymer-coated electrodes have been considered as materials that new areas of important application can be found. This report describes some of the recent work on preparation of polymer-coated electrodes, electro-polymerization, functions and applications of polymer-coated electrodes.  
        关键词：Electrode;Electropolymerization;Electrochemical polymerization;Conductive polymer   
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        发布时间：2022-09-18
      • Yifeng Liu,Juan Zhang,Jianrui Liu,Binglin Zhang,Linxue Liu,Junying Song
        Vol. 4, Issue 3, Pages: 176-179(1991) DOI: 10.14028/j.cnki.1003-3726.1991.03.009
        摘要：Poly (ethylene terephatate) (PET) waste materials were depoly-m erized by ethylene glycol under the selecting reaction conditions. Bis (2-hydroxyethyl) terephthatate (BHET) content of the resultant was considerable. The resultant was easily purified. The etherification reaction of ethylene glycol was also restrained. BHET was polymerized to give poly (ethylene terephatate), the quality index of which was up to standard. The spinnability of PET was better.  
        关键词：Poly (ethylene terephatate) waste;Ethylene glycol;Depolymerizing reaction   
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        发布时间：2022-09-18
      • Dahua Liu
        Vol. 4, Issue 3, Pages: 180-186(1991) DOI: 10.14028/j.cnki.1003-3726.1991.03.010
        摘要：there was evident reduction in the increasing speed of synthetic rubber production among 1980s except EPDM, TPE and carboxylated latex. Most producers put emphasis on improvement of characteristic and using performance of original rubber products and devoted to develop more and more new elastomers with various modification technologies. In this article, there has a brief description on the improvement route of quality of synthetic rubber. Besides, it also summarized the basical feature of thermoplastic elastomers and various chemical and physical modification technologies for superior performance. Finally there has prospects on the R&amp;D of elastomers for the 1990s.  
        关键词：Synthetic rubber;Modification technologies;Thermoplastic elastomer;Superior performance   
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        发布时间：2022-09-18
      • Yun Lu
        Vol. 4, Issue 3, Pages: 187-189(1991) DOI: 10.14028/j.cnki.1003-3726.1991.03.011
        摘要：The relationships between various measurements (τ, Rp, and ) and the rate constants (kd, kp and Rt) in free-radical chain polymerization were described by the triangular schema which plays an active role in helping students understand and remember the said contents.  
        关键词：Free-radical chain polymerization;Kinetic parameters   
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        发布时间：2022-09-18
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