最新刊期
      卷 11 ， 期 3 ， 1998
      • Yuesheng Li,Mengxian Ding,Jiping Xu
        Vol. 11, Issue 3, Pages: 1-8(1998) DOI: 10.14028/j.cnki.1003-3726.1998.03.001
        摘要：Recent advances of aromatic polyimide membrane materials for gas separation was reviewed.The relationship between gas separation properties and chemical structure of aromatic polyimide prepared in authors’ laboratory bas been discussed.  
        关键词：Polyimide;Permeability;Permselectivity;Gas separation;Membrane   
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        发布时间：2022-09-18
      • Yongcheng Liu,Zhengzhong Shao,Yuyu Sun,Tongyin Yu
        Vol. 11, Issue 3, Pages: 17-23,50(1998) DOI: 10.14028/j.cnki.1003—3726.1998.03.003
        摘要：This paper describes the results obtained in recent decades on the components, structures,properties and applications of silk fibroin and the major work on silk fibroin in our group.  
        关键词：Silk fibroin;Component;Structure;Property;Application   
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        发布时间：2022-09-18
      • Linxain Feng,Zhiqiang Fan,Junting Xu,Shilin Yang
        Vol. 11, Issue 3, Pages: 24-29,65(1998) DOI: 10.14028/j.cnki.1003-3726.1998.03.004
        摘要：In this paper,several developments in polymerization mechanism of heterogeneous Ziegler-Natta catalyst were reviewed,which include the presence of plural active sites,measurement of kinetic parameters of various active sites and the mechanism of electron donors.  
        关键词：Heterogeneous Ziegler-Natta catalyst;Plural active sites;Kinetics;Electron donors   
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        发布时间：2022-09-18
      • Jianhua Guo,Zhewen Han,Pingping Wu
        Vol. 11, Issue 3, Pages: 30-36(1998) DOI: 10.14028/j.cnki.1003-3726.1998.03.005
        摘要：This review article systemtically summarizes the important advances in atom transfer radical polymerization (ATRP), including various initiating systems, mechanism, kinetic investigation and the model polymers synthesized by this method. Simple organic halides are used as initiators. This new technique empolys redox process with transition metals in which a halogen atom is transferred reversibly between transition metal and polymer chain end. A low stationary concentration of growing radicals is in a fast dynamic equilibrium with the dormant species, so bimo lecular termination is minimized. There 're two types of ATRP. One is catalyzed by CuX, the other is catalyzed by RuCl2 (PPh) 3. Generally, ATRP is useful for synthesizing various polymers with molecular weights of 103 to 105 and low dispersites. This technique has been used to polymerize many kinds of vinylmonmers; to prepare random, gradient, alternating, block and graft copolymers; and to synthesize macromolecules with various topologies(branched, hyperbranched and star polymers).  
        关键词：Atom transfer radical polymerization;"Living" polymerization;Radical polymerization;Model polymers   
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        发布时间：2022-09-18
      • Ning Luo,Dening Wang,Shengkang Ying
        Vol. 11, Issue 3, Pages: 37-43(1998) DOI: 10.14028/j.cnki.1003-3726.1998.03.006
        摘要：The research progress about hydrogen bonding of polyether poly(urethane urea) s was reviewed in this paper with 29 references.Changes of multiple infrared absorbencies were shown in the absorption zone of the urea carbonyl group from1698cm-1 to1627cm-1,according to chemical composition,the morphological feature of hard segment and preparation condition of poly(urethane urea) samples.The multi-bands have been assigned qualitatively.Some detailed topics, such as the basic structure of urea hydrogen bonds,relation of the hydrogen bonding state with crystalline of hard segment,as well as the quantitative analysis of urea hydrogen bonding, should be studied further.  
        关键词：Polyether Poly(urethane urea);Hydrogen bond;Structure;Crystalline   
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        发布时间：2022-09-18
      • Yuejin Tong,Yuesheng Li,Mengxian Ding
        Vol. 11, Issue 3, Pages: 44-50(1998) DOI: 10.14028/j.cnki.1003—3726.1998.03.007
        摘要：Aromatic poly(amide ester) is important precursor of aromatic polyimide.Synthesis motheds,physical and chemical properties of aromatic poly(amid ester) as well as its application in microelectron were reviewed.  
        关键词：Polyimide;Polyamide ester;Molecular composite;Optical active resin;Alignment   
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        发布时间：2022-09-18
      • Yuping Dong,Linxian Feng,Shilin Yang,Jiacong Shen
        Vol. 11, Issue 3, Pages: 51-58(1998) DOI: 10.14028/j.cnki.1003-3726.1998.03.008
        摘要：This article reviews the mechanism of alterna ting polymerization between styrene and maleic anhydride based on the charge complex formation.  
        关键词：Styrene;Maleic anhydride;Copolymerization mechanism   
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        发布时间：2022-09-18
      • Weichang Liu,Shengjun Shen,Deshan Liu
        Vol. 11, Issue 3, Pages: 59-65(1998) DOI: 10.14028/j.cnki.1003-3726.1998.03.009
        摘要：A review with 21refs focus on the novel liquid crystalline epoxy resin.The epoxy compounds and curing agents are classified by their structure and properties.It is mainly introduced the influence of the epoxy compounds’ activity,molecular weight and their match with curing agents on property.The properties and applications of the liquid crystalline epoxy resin are also shown.  
        关键词：Liquid crystalline thermosets;Liquid crystalline epoxy resin;Curing   
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        发布时间：2022-09-18
      • Shengqing Xu
        Vol. 11, Issue 3, Pages: 66-71,88(1998) DOI: 10.14028/j.cnki.1003-3726.1998.03.010
        摘要：This paper describes the methods of preparation and polymerization of monomers of oxazoline. The modification of polyoxazolines by chemical reactions and their blends are int roduced.  
        关键词：Oxazoline;Polymerization;Polyoxazoline;Blend   
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        发布时间：2022-09-18
      • Min Li,Hongjin Qiu
        Vol. 11, Issue 3, Pages: 72-77(1998) DOI: 10.14028/j.cnki.1003—3726.1998.03.011
        摘要：This short review describes the most recent advances in the study on liquid crystalline elastomers(LCE). LCE exhibits liquid crystalline state that resembles to its precursor in the uncrosslinked state,also its elastic properties are different from conventional elastomers.The most interesting phenomena of smectic C* LCE is piezoeleltric property which might be useful in waveguide and piezoelectric sensor.  
        关键词：Liquid crystalline elastomers;Elasticity;Liquid crystallinity;Piezo electricity   
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        发布时间：2022-09-18
      • Zhenzhong Yang,Yuanze Xu,Delu Zhao,Mao Xu
        Vol. 11, Issue 3, Pages: 78-82,F3(1998) DOI: 10.14028/j.cnki.1003-3726.1998.03.012
        摘要：Phase inversion technique for preparing waterborne particles of polymer resins is an effective method,which has been gained more attention in polymer industry.In this paper,the modes and types of phase inversion are mainly reviewed,besides,the theoretical treatments of phase inversion are also briefly discussed.  
        关键词：Waterborne particles;Polymer resins;Phase inversion technique   
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        发布时间：2022-09-18
      • Guian Wen,Wengong Zhang
        Vol. 11, Issue 3, Pages: 83-88(1998) DOI: 10.14028/j.cnki.1003-3726.1998.03.013
        摘要：The purpose of this paper is to discuss the characteristics and method of Plasmainitiated Polymerization(PIP), and applcations of plasma-initiated polymerized product in ultrahigh molecular weight polymer,inorganic polymeric materials,crystal polymers,and in surface modification of materials.  
        关键词：Low-Temperature plasma;Plasma-initiated polymenrization;Ulturahigh molecular weght polymer   
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        发布时间：2022-09-18
      • Yinghua Qi,Tianlu Chen,Hongyan Jiang,Jiping Xu
        Vol. 11, Issue 3, Pages: 89-95(1998) DOI: 10.14028/j.cnki.1003-3726.1998.03.014
        摘要：Matrix Assisted Laser Desorption / Ionization time-of-flight Mass Spectrometry (MALDI-TOF MS), which is a rapid and convenient method for the detection and identification of polymers, is gaining the attention of chemists. Recently, its development is very fast. It is used for measuring compo unds with high molecular masses and satisfied results have been observed. In this paper we provide an overview of its principles, selection of matrix and cation, application to polymer analysis.  
        关键词：MALDI-TOF MS;Polymer;Analyte;Molecularion   
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        发布时间：2022-09-18
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