最新刊期
      卷 20 ， 期 11 ， 2007
      • Bin XU,Hong-jing DOU,Kang SUN
        Vol. 20, Issue 11, Pages: 1-5(2007) DOI: 10.14028/j.cnki.1003-3726.2007.11.001
        摘要：It is difficult to synthesize polymer-coated magnetic nanoparticles for the immiscibility between the polymer coat and the magnetic nanoparticles.In-situ synthesis provides an approach to fabricate polymer-coated magnetic hybrid particles in which inorganic magnetic nanoparticles are incorporated homogeneously.In this paper a variety of in-situ synthetic methods of polymer-coated magnetic nanoparticles reported in recent years are reviewed, and moreover, different methods are compared in view of their mechanism, requirements and applied fields.  
        关键词：Polymer;Magnetic;Hybrid particles;In-situ synthesis   
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        发布时间：2022-09-18
      • Mei-shun LI,Zai-jun LU,Ying LIU
        Vol. 20, Issue 11, Pages: 6-16(2007) DOI: 10.14028/j.cnki.1003-3726.2007.11.002
        摘要：A series of morphologies based on the self-assembly of diblock and triblock copolymers in the bulk are summarized in this article.They include (1) the gyriod morphologies formed from diblock copolymers, (2) some morphologies formed from triblock copolymers, such as spherical domains in a CsCl-type structure, cocentric spherical domains in the bcc structure, lamella-sphere, cylinder-sphere, lamella-cylinder, coaxial cylinder, cylindrical domains in a hexagonal lattice structure, lamella-cylinder, lamella-cylinder-Ⅱ, ordered tricontinuous doublediamond, core-shell double gyroid, lamellar, (3) some complex morphologies, such as mushroom, sphere on sphere, knitting-pattern, et al.Furthermore, their advance in the future was also introduced briefly.  
        关键词：Block copolymers;Self-assembly;Morphologies   
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        发布时间：2022-09-18
      • Yan-Xia CAO,Guang-Ji LI,Hui-Min LIU
        Vol. 20, Issue 11, Pages: 17-24(2007) DOI: 10.14028/j.cnki.1003-3726.2007.11.003
        摘要：The poly(meth) acrylates possess excellent transparency, light resistance and weatherability and they are widely used as optical plastics.In recent years the research and development of optical plastics has been focused on transparent polymer materials with high refractive index, excellent heat resistance and low hydroscopicity.The main ways to prepare new-type transparent polymer materials poly (meth) acrylates, including the methods of novel monomer synthesis polymerization, copolymerization, blend-copolymerization and organic-inorganic nanohybridization, were reviewed in this paper.The characteristics of each method and the performances of transparent polymer materials prepared via each method were systematically summarized, showing potential application prospects of the methods of novel monomer synthesis polymerization and organic-inorganic nano-hybridization.  
        关键词：Poly(meth) acrylates;Transparent polymers;Refractive index   
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        发布时间：2022-09-18
      • Qing-quan YU,Qi YANG,Sui-lin LIU,Guang-xian LI
        Vol. 20, Issue 11, Pages: 25-29(2007) DOI: 10.14028/j.cnki.1003-3726.2007.11.004
        摘要：Block copolymers have rich phase behavior, and in the bulk they can microphase-separate to form spheral, cylindrical, b-i continuous or layered structure. When block copolymers are confined in space having certain directing features, either topological or chemical, the self-assembly process can be strongly influenced when the features approach the length of the equilibrium periodicity of the block copolymer domains. In this paper, the influences of confinement and boundary conditions on self-assembly of block copolymer were reviewed and discussed experimentally. Problems and a perspective in this research field are also discussed.  
        关键词：Block copolymer;Confined self-assembly;Influencing factor;Morphology;Experimental research   
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        发布时间：2022-09-18
      • Shi-tong ZENG,Jun HU
        Vol. 20, Issue 11, Pages: 30-40(2007) DOI: 10.14028/j.cnki.1003-3726.2007.11.005
        摘要：Maillard reaction products has been extensively attentioned in food and tobacco industry, because of their natural property and unique flavor. Small molecular compounds produced in Maillard reaction have been generally clarified so far, while polymeric products have not been well understood due to complexity of the system. However, through characterized by GPC, microanalysis, radiochemical investigation, UV-vis, IR, NMR and pyrolysis after purified by dialysis and colomn chromatography, some information related to molecular structure and formation mechanism of Maillard polymeric product was derived. In this paper, separation, characterization and hypothesises of molecular structure of polymeric products formed in Maillard reaction were summarized.  
        关键词：Maillard reaction;Polymeric products;Separation;Characterization;Flavouring   
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        发布时间：2022-09-18
      • Chong-jun ZHAO,Xing-wei LI,Hua ZHANG
        Vol. 20, Issue 11, Pages: 41-47(2007) DOI: 10.14028/j.cnki.1003-3726.2007.11.009
        摘要：Development of studies on the preparations and properties of conducting polymers (CPs)with different wettabilites are reviewed.The conducting polymers were functioned during the processes including polymerization, redox, subsequent treatment and fluorinated treatment.In addition, abroad and domestic progresses in this field are compared in brief, and research prospect for wettability properties of conducting polymers is presented.  
        关键词：Conducting polymers;Wettability;Surface Roughness;Doping dedoping   
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        发布时间：2022-09-18
      • Ji-yang SHEN,Guo-xiang CHENG
        Vol. 20, Issue 11, Pages: 48-52(2007) DOI: 10.14028/j.cnki.1003-3726.2007.11.006
        摘要：Hydroxypropyl methyl cellulose succinate (HPMCS) was synthesized from hydroxypropyl methyl cellulose (HPMC) by esterification using succinic anhydride as esterifying agent, anhydrous sodium acetate as catalyst and acetic acid as organic solvent. By varying reaction temperature and the amount of esterifying agent and catalyst, five kinds of HPMCS with the different content of carboxybutyryl groups were prepared. The content of carboxybutyryl groups in HPMCS was determined by conductometric titration. Its structure and properties were analyzed by IR, viscometer and rheometer. The result showed that the number of carboxybutyryl groups per macromolecular chain was from 6.57 to 12.42, that the gelation temperature of 1% by weight HPMCS solutions ranged from 48.7℃ to 41.95℃, whereas that of a 1wt% HPMC solution was 59.85℃ and that with an increase in carboxybutyryl content and distribution homogeneity, its gelation temperature decreased but its gel strength increased.  
        关键词：Hydroxypropyl methyl cellulose succinate;Hydroxypropylmethyl cellulose;Succinic anhydride;Carboxybutyryl group;Gelation temperature   
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        发布时间：2022-09-18
      • Li ZHU,Xiaoling HU,Ping GUAN
        Vol. 20, Issue 11, Pages: 60-66(2007) DOI: 10.14028/j.cnki.1003-3726.2007.11.008
        摘要：As a new polymer material, molecularly imprinted polymeric microspheres (MIPMs) have attracted great interest for peculiar molecular recognition. MIPMs have a series of advantages, such as excellent selectivity, high adsorption, high efficiency in chromatography and easy design. MIPMIS can be used in some high technology fields, for instance solid-phase microextraction and chiral separations of pharmaceutical etc. In this article, the main methods of preparation of MIPMs were introduced, the advantages and disadvantages of these methods were also summarized. The effects of the methods on the properties of MIPMs were discussed. The characteristics methods of structure and performance were also introduced in detail. On the base of these reviews, the problems need to be resolved and the trends of development were discussed.  
        关键词：Molecularly imprinted;Polymeric microspheres;Preparation;Characterization   
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        发布时间：2022-09-18
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