最新刊期
      卷 2 ， 期 2 ， 1989
      • Mao Xu,Shiru Hu
        Vol. 2, Issue 2, Pages: 1-6(1989) DOI: 10.14028/j.cnki.1003-3726.1989.02.001
        摘要：The heterogeneity in molecular composition of segmented copolymers has been evidenced by studies on structures of different scales . It was proposed that in addition to microphase separation between hard and soft segments, the macrophase separation between segmented molecules of different composition or average segment length should be considered first in discussing the morphology and properties of segmented copolymers. The characterization and control of compositional heterogeneity become problems of importance for these polymers.  
        关键词：Segmented copolymer;Com positional heterogeneity   
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        发布时间：2022-09-18
      • Meilin Yang,Jiacong Shen
        Vol. 2, Issue 2, Pages: 7-17(1989) DOI: 10.14028/j.cnki.1003-3726.1989.02.003
        摘要：The study on the micro—kinetics of polymerization has got some successful results in which the graph analysis method is strict and may be very simply applied to any addition polymerization system. Some new problems are put forward by combining chemical kinetics with physical diffusion process.  
        关键词：Polymerization micro-kinetics;Graph analysis method;Po— lymrization engineering;Molecular design   
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        发布时间：2022-09-18
      • Yuanze Xu
        Vol. 2, Issue 2, Pages: 18-23,63(1989) DOI: 10.14028/j.cnki.1003-3726.1989.02.004
        摘要：The polymer structural rheology studies the relations of rheological properties with long chain structure of polymers. The basic approaches, new results as well as the frontier problems are reviewed with emphasis on the kinetic theory and scaling concepts. It is demonstrated that the bead-spring chain model where the selfsimilarity nature of flexible chain has been considered, plays central role and forms a basis for the further developments of molecular theory of dilute and semi-dilute solution. Some new results along this line are outlined which allows to explain and even predict rheological properties from measurable molecular parameters in dilute solutions.  
        关键词：Structural rheology;dilute and semidilute solutions;kinetic theory;bead-spring chain model of Rouse and Zimm;scaling theory   
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        发布时间：2022-09-18
      • Dexin Luo,Shoiikuan Fu
        Vol. 2, Issue 2, Pages: 24-31(1989) DOI: 10.14028/j.cnki.1003-3726.1989.02.005
        摘要：This paper reviewed the advances in the kinetic study on emulsion polymerization, mainly the reseach works on Interval Ⅱ done by Gilbert. It also introduced in this paper the kinetic treatments and solutions of the Smith-Ewart generalized equation for the small particle size latex systems with monomers of various water solubilities. The limitations of the treatment were discussed.  
        关键词：Emulsion polymerization;Small particle size seeded latex;Kinetic study;Smith-Ewart generalized equation   
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        发布时间：2022-09-18
      • Jin Wang,Yongnian Zhao,Dehou Lin
        Vol. 2, Issue 2, Pages: 32-38(1989) DOI: 10.14028/j.cnki.1003-3726.1989.02.006
        摘要：The application of laser Raman spectroscopy in structure, morphology and characterization of crystal, kinetics process of reaction and orientation of polymer, as well as the latest development of Longitudinal acoustic mode, resonance, high temperature-high pressure, optical waveguide and Fourier transform Raman spectroscopy in the field of polymer science were reviewed .  
        关键词：Laser Raman spectroscopy;Longitudinal acoustic mode;Optical waveguide;Fourier transform   
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        发布时间：2022-09-18
      • Ruifang Yan
        Vol. 2, Issue 2, Pages: 39-44(1989) DOI: 10.14028/j.cnki.1003-3726.1989.02.007
        摘要：The article briefly reviews the developing history and resources- situation of Cutta-Percha. It points out that the birth of Gutta-Percha rubber with high elasticity is a sign that the research-development of Gutta-Percha has entered into a new stage. A new concept has been proposed that the critical cross linking - degree is a key that Gutte-Percha gets high elasticity. The high elasticity of the macromolecule-network made of the order-flexible chain of Gutta-Percha can not be explained by the contribution of disordercoil chain, it is due to the entirety-disorder of the macro molecule-network of Gutta-Percha. The research-development of Gutta-Percha has entered into a new stage of systemaic project.  
        关键词：Gutta-Percha;High elasticity   
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        发布时间：2022-09-18
      • Zhusheng Chen
        Vol. 2, Issue 2, Pages: 45-50(1989) DOI: 10.14028/j.cnki.1003-3726.1989.02.009
        摘要：Reaction injection molding, commonly called RIM, is a method for rapid production of complex plastic parts directly from low viscosity monomers or oligomers. In this paper, the development of RIM, RIM chemical systems,RIM process and forming RIM parts,characteristics of RIM process and RIM polyurethanes formulations are discussed.  
        关键词：Reaction injection molding;Injection molding;Polymer processing;Polyurethane;Polyurea   
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        发布时间：2022-09-18
      • Fuming Sun,Weizhen Cai,Zongneng Qi
        Vol. 2, Issue 2, Pages: 51-55(1989) DOI: 10.14028/j.cnki.1003-3726.1989.02.010
        摘要：A commercial available Perkin-Elmer tnermome-chanical ana— lyzer TMS-2 was modified in our laboratory in order to measure the Thermally Stimulated Creep(TSCr)behavior of polymer materials. The glass transition relaxation of low density polyethylene in the temperature range between -83 to + 30 ℃ was resoluted by means of the fractional loading TSCr procedure in bending loading manner,and the molecular parameters were calculated from the TSCr spectra. The results were in good agreement with that obtained from the torsional loading TSCr experiment. Therefore this is a convenient technique to study the relaxation behavior of polyιner materials.  
        关键词：Thermally Stimulated Creep;thermomechanical analyzer;low density polyethylene   
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        发布时间：2022-09-18
      • Lingying Zheng
        Vol. 2, Issue 2, Pages: 56-61(1989) DOI: 10.14028/j.cnki.1003-3726.1989.02.011
        摘要：This paper outlines seven membrane separation processes for liquid separation with polymer material membranes, i. e. ion exchange membrane and electrodialysis, reverse osmosis (hyperfiltration), ultrafiltration, microfiltration, membrane extraction, pervaporation and membrane distilation. The principle, polymer membrane materials used, application and derelopmemt trend of each process have been simply elucidated. And the status as well as the perspective of membrane separation of China have been reviewed.  
        关键词：Membrane separation;Electrodialysis;Reverse osmosis;Ultrafiltration;Microfiltration;Membrane extraction;Pervaporation;Membrane distilation   
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        发布时间：2022-09-18
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