最新刊期
      卷 16 ， 期 5 ， 2003
      • Li-jian LIU,Li -qiong LIAO,Ying SONG,Zhao-ju YU,Chao ZHANG
        Vol. 16, Issue 5, Pages: 1-6(2003) DOI: 10.14028/j.cnki.1003-3726.2003.05.001
        摘要：Poly (ε-caprolactone) (PCL) with Mw120kg·mol-1 and polylactide with Mw225kg·mol-1 were obtained respectively by a5min ring opening polymerization (ROP) ofε-caprolactone (CL) and lactide (LA) with stannous octoate as catalyst under microwave irradiation. PCL (Mw over40kg·mol-1) was also prepared from the microwave-assisted polymerization of CL initiated by benzoic acid. Ibuprofen-PCL controlled release system was formed directly by the ROP of CL mixed with Ibuprofen. Heating behavior of CL and LA by microwaves had significan effect on their microwave polymerization.  
        关键词：Microwave;Ring opening polymerization;Caprolactone;Lactide   
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        发布时间：2022-09-18
      • Shi-fa HOU,Yao-chun HE,Meng-xian DING,Lian-xun GAO
        Vol. 16, Issue 5, Pages: 7-16(2003) DOI: 10.14028/j.cnki.1003-3726.2003.05.002
        摘要：The development of the proton conducting membranes of non-fluorinated polymers for fuel cells was reviewed. Preparations, properties, and applications of polybenzimidazole, polyaryletherketone, polyimide,polyquinoline and polysulfone systems were covered. The research trend in the field is predicted.  
        关键词：Non-fluorinated polymer;Proton conducting membrane;Fuel cell   
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        发布时间：2022-09-18
      • Jin-gang LIU,Hai -xia YANG,Li-feng WANG,Yan-feng LI,Lin FAN,Shi-yong YANG
        Vol. 16, Issue 5, Pages: 17-27(2003) DOI: 10.14028/j.cnki.1003-3726.2003.05.003
        摘要：Research and development of fluorinated heteroaromatic polymers,such as polybenzimidazoles ,polybenzoxazole and poly (arylene ether) and so on,have been summarized. The synthesis of fluorinated monomers,aromatic tetraamines and diacids and the fluorinated heteroaromatic polymers were discussed in detail,respectively. The applications of fluorinated heteroaromatic polymers in microelectronics fields were introduced at the same time.  
        关键词：Heteroaromatic polymers;Trifluoromethyl;Microelectronic applications   
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        发布时间：2022-09-18
      • Shu-fang HUANG,Zhong-yi JIANG,Hong WU,Song-wei XU
        Vol. 16, Issue 5, Pages: 28-35(2003) DOI: 10.14028/j.cnki.1003-3726.2003.05.004
        摘要：The typical problems encountered in enzyme encapsulation through sol-gel process,such as too long gelation time,small gel pore size,low gel mechanical strength and so on,are briefly outlined. These problems can result in three dimensional conformation alteration and the active site shielding of the immobilized enzyme,the slow diffusion rate and the inaccessibility of substrate to the immobilized enzyme. The corresponding tentative solutions are presented herein: the gelation time can be considerably shortened by the appropriate screening of precursors and encapsulation conditions. The gel pore size can be enlarged and structure can be tailored with the introduction of chemical modifiers such as polyethylene glycol,glucose,cyclodextrin and other nonsurfactants. The mechanical strength of gel can be increased by the suitable drying process and drying control additives. In addition,other approaches are also mentioned to avoid enzyme denaturation,such as the special treatment during the aging stage and the suitable selection of buffer solution.  
        关键词：Sol-gel;Enzyme;Immobilization;Problems;Solutions   
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        发布时间：2022-09-18
      • Zhi-wu LIANG,Guang-jie HAO,Xiao-yi SHEN,Tian-ying GUO,Mou-dao SONG,Bang-hua ZHANG
        Vol. 16, Issue 5, Pages: 36-41(2003) DOI: 10.14028/j.cnki.1003-3726.2003.05.005
        摘要：The preparation methods of polymer microparticles with hollow structure are reviewed,including self-assembly approach,template approach and emulsion approach. More than 40 papers and patents are referred.  
        关键词：Hollow structure;Hollow microparticles;Microsphere;Polymer latexes   
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        发布时间：2022-09-18
      • Yi-hua YIN,Zhi-hui XIAO,Rong-shi CHENG
        Vol. 16, Issue 5, Pages: 42-48(2003) DOI: 10.14028/j.cnki.1003-3726.2003.05.006
        摘要：The progress in preparations,morphology,structures and properties about shell cross-linked knedel-like nanoparticles (SCKs) as well as their application were reviewed. Particularly,each of the examples of SCK nanospheres currently known is introduced here according to their functions.  
        关键词：Shell cross-linked knedel-like nanoparticles   
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        发布时间：2022-09-18
      • Fanling MENG,Liang LUO,Hui NING,Ju ZUO
        Vol. 16, Issue 5, Pages: 49-56(2003) DOI: 10.14028/j.cnki.1003-3726.2003.05.007
        摘要：This review focuses on the structure and properties,the thermoreversible gelation and counterioninduced gelation of κ-carrageenan combined with the authors’works.  
        关键词：κ-Carrageenan;Gelation;Counterions   
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        发布时间：2022-09-18
      • Bin TONG,Bao-ling ZANG,Rong-Ji DAI,Bao-yan ZHANG
        Vol. 16, Issue 5, Pages: 57-63(2003) DOI: 10.14028/j.cnki.1003-3726.2003.05.008
        摘要：Because liquid crystalline ionomers contain both mesogenic group and ionic group,it is difficult to synthesize liquid crystalline ionomers. Now researchers are trying to find new synthetic methods to provide more liquid crystalline ionomers to satisfy the different needs. In this paper,the synthetic methods of liquid crystalline ionomers were reviewed.  
        关键词：Liquid crystalline ionomer;Liquid crystal;Synthetic method   
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        发布时间：2022-09-18
      • Xing-shun* ZHAO,Xiao-bin DING,Jun-hua ZHANG,Juan DU,Zhao-hui ZHENG,Wen-chuan ZHANG,Yu-xing PENG
        Vol. 16, Issue 5, Pages: 64-69(2003) DOI: 10.14028/j.cnki.1003—3726.2003.05.009
        摘要：Emulsions of chlorinated polypropylene are the important composition of water-borne coatings for polyolefin specially. The composition and preparation of chlorinated polypropylene emulsions were reviewed in this paper. Cartainly,its foreground is prospected also.  
        关键词：Chlorinated polyolefin;Adhesion promoter;Emulsion   
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        发布时间：2022-09-18
      • Jian-fa LI,Zhan-qian SONG
        Vol. 16, Issue 5, Pages: 70-74,35(2003) DOI: 10.14028/j.cnki.1003-3726.2003.05.010
        摘要：The development and major kinds of polymer materials for improving soil structure were introduced ,as well as their performing mechanisms. Their application prospects on combating desertification,controlling water loss and soil erosion,and in the construction of irrigation works and roads were proposed.  
        关键词：Polymer material;Soil-structure improving agent;Soil stabilizing agent;Soil improvement   
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        发布时间：2022-09-18
      • Hai-yang YANG,Yuan-ping YI,Ping-ping ZHU,Ping-sheng HE
        Vol. 16, Issue 5, Pages: 76-80(2003) DOI: 10.14028/j.cnki.1003-3726.2003.05.012
        摘要：Another new computer simulation experiment in teaching course of "Experiments in Polymer Physics" was introduced. The morphology of two-dimensional self-avoiding walk chain and random walk chain was simulated based on improved four-site model. The corresponding scaling law was checked. It was found that the simulation results conform well to the theory of de Gennes.  
        关键词：Improved four-site model;Self-avoiding walk chain;Random walk chain;scaling theory   
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        发布时间：2022-09-18
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