最新刊期
      卷 6 ， 期 4 ， 1993
      • Deyan Shen,Renyuan Qian
        Vol. 6, Issue 4, Pages: 193-196,216(1993) DOI: 10.14028/j.cnki.1003-3726.1993.04.001
        摘要：A new chain entanglement viewpoint of polymer, that is the local inter - chain cohesion in the glassy state as a kind of cohesional chain entanglement, was used to explain the mechanism of the endothermic peak of aged polymers in DSC measurement and stress yielding in uniaxial stretching process.  
        关键词：chain entanglement;physical ageing;conformational relaxation;stress yielding;Infrared spectroscopy   
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        发布时间：2022-09-18
      • Jingshu Shen
        Vol. 6, Issue 4, Pages: 197-203(1993) DOI: 10.14028/j.cnki.1003-3726.1993.04.002
        摘要：A review with 31 references on strength and fracture studies of polymers with emphasis on sketch and tendency by various research approaches.  
        关键词：Polymer strength;Polymer fracture;Polymer failure   
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        发布时间：2022-09-18
      • Congwu Li,Ang Pan
        Vol. 6, Issue 4, Pages: 204-209,221(1993) DOI: 10.14028/j.cnki.1003-3726.1993.04.003
        摘要：The photopolymerization of polymerable liquid - crystalline monomers criented by surface treatments, electric and/or - magnetic fields, application of shear stress is an importment method for preparing highly homogeneous, hihgly transparent and highly oriented polymeric liquid -crystalline films, which is prospective in the applications such as nonlinear optical materials , electrical conductive materials and optical fiber coatings.  
        关键词：Liquid crystals;Orientation;Photopolymerization   
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        发布时间：2022-09-18
      • Zhewen Han,Zhibao Lu,Pingping Wu
        Vol. 6, Issue 4, Pages: 210-216(1993) DOI: 10.14028/j.cnki.1003-3726.1993.04.004
        摘要：As rigid rod aromatic heterocyclic polymers were synthesized, the concept of molecular composite was pioneered. This paper describes research and development of molecular composite which are dispersions of the rigid rod polymer molecules as a reinforcement in a matrix of flexible coil polymers,for the recent 10 years. The synthesis and properties of a several typical molecular composite systems, for instance, all aromatic, polyamide,and high temperature stable thermoplastic matrixes systems are introduced, The prognosis of the developed processes for commercial viability appears very good.  
        关键词：Key word Poly (p-phenylene benzobisthiazole ) (PBZT);Rigid-Rod Polymer;Molecular Composite   
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        发布时间：2022-09-18
      • Qingda Zang
        Vol. 6, Issue 4, Pages: 217-221(1993) DOI: 10.14028/j.cnki.1003-3726.1993.04.005
        摘要：The Process of Complexation of synthetic polyampholytes with low molecular weight substances (metal ions, surfactants, dyes, organic probes etc. )and high molecular weight compounds (polyelectrolytes, proteins) as well as the factors influencing complexation have been reviewed in this paper.  
        关键词：Polyampholyte;Small Molecular Substance;Macromolecule;Interaction Complexation   
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        发布时间：2022-09-18
      • Ping Chen,Xianyou Zhang
        Vol. 6, Issue 4, Pages: 222-225,229(1993) DOI: 10.14028/j.cnki.1003-3726.1993.04.006
        摘要：The toughening methods and mechanism of thermosetting resins with inorganic fillers, rubber modifier (or elastomer )and thermoresins ect were reported in this paper. The criterion of thermodynamics and dynamics of the phase - seperation theory in rubber modified systems were discussed as well.  
        关键词：Thermosetting resin;Toughness;Toughened mechanism   
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        发布时间：2022-09-18
      • Xiaofeng Xu,Lianda Jia,Jiping Xu
        Vol. 6, Issue 4, Pages: 226-229(1993) DOI: 10.14028/j.cnki.1003-3726.1993.04.007
        摘要：The polymer—based dehumidification membarane is a kind of novel gas - separation membranes. The characteristics of transport of water vapor in polymer membranes and the material selection of dehumidi - fication membranes have reviewed in brief in this paper. The prospects and applications of some commercial dehumidification modules are also introduced.  
        关键词：Gas drying;Dehumidification membranes;Clustering mobility;Permeability;Selectivity   
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        发布时间：2022-09-18
      • Rongjiang Yan
        Vol. 6, Issue 4, Pages: 230-233(1993) DOI: 10.14028/j.cnki.1003-3726.1993.04.008
        摘要：The studies on deformation mechanism of drawn crystalline polymers have been reviewed. Special attention is paid to different points of view and experimental data of structural transformation of drawn polymers from spherulite (or lamellar stacks) to fiber structure during necking. It is suggested that deformation mechanism of crystalline polymers may be different depending on drawing condition.  
        关键词：Crystalline polymers;Drawing;Deformation mechanism;Lamellar crystal;Fiber   
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        发布时间：2022-09-18
      • Jianwen Yang,Shanxin Yu
        Vol. 6, Issue 4, Pages: 234-243,233(1993) DOI: 10.14028/j.cnki.1003-3726.1993.04.009
        摘要：This paper reviews the advances during the passed years on synthesis of five patterns of insolube polymer - supported phase transfer catalyst using onium salts,crown ethers & cryptants, polyethylene glycol catalyst using onium salts, crown ethers & cryptants, polyethylene glycol (PEG)& its derivates,cosolvents and optically active quaternary ammonium salts as their active site respectively,and presents the characteristic of some of them.  
        关键词：polymer-supported;phase transfer catalyst;Advance;sythesis   
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        发布时间：2022-09-18
      • Lei Rao,Honggao Shi
        Vol. 6, Issue 4, Pages: 244-247(1993) DOI: 10.14028/j.cnki.1003-3726.1993.04.010
        摘要：Chelation can be taken between amidoxime group in amidoxime chelate fiber and some metal ions. The adsorbent has better adsorbability. This paper is outlined the development and usage of all kinds of amidoxime chelate fibers.  
        关键词：Amidoxime;Chelate fiber   
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        发布时间：2022-09-18
      • Qing Wu,Haihua Wang
        Vol. 6, Issue 4, Pages: 248-252,247(1993) DOI: 10.14028/j.cnki.1003-3726.1993.04.011
        摘要：This paper presents a review concerning the Ziegler - Natta catalysts for gaseous phase polymerization of ethylene and typical methods of preparing the catalysts. The effects of prepolymerization and the differences in apparent kinetics between gaseous phase polymerization and slurry polymerization are also briefly described.  
        关键词：Ethylene;Gaseous phase polymerization;Ziegler-Natta catalyst   
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        发布时间：2022-09-18
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