最新刊期
      卷 28 ， 期 7 ， 2015
      • Wei-guang NIE,Zi-li XU
        Vol. 28, Issue 7, Pages: 1-6(2015) DOI: 10.14028/j.cnki.1003-3726.2015.07.001
        摘要：Ion imprinting technology is a technique to design artificial polymers with a predetermined selectivityand specificity for a given target molecule by cross-linking polymerization in the presence of the target molecule (template). Due to the advantages such as simple preparation method, stable structure, excellent recognization property, rapid adsorption ability and large adsorption capacity, ion imprinted polymer is widely used in ion separation,enrichment, sewage treatment, sensing identification fields, solid phase extraction etc. For the diversity of ion imprinted polymer, the principles, preparation methods and its strongpoints and shortcomings, analysis methods and applications of ion imprinted polymer are reviewed. The future development of ion imprinted polymer are prospected as well.  
        关键词：Ion imprinted polymer;Preparation methods;Applications   
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        发布时间：2022-09-18
      • Gen LI,Feng WANG,Rui WANG,Xiu-qin ZHANG,Ming-shu YANG
        Vol. 28, Issue 7, Pages: 7-16(2015) DOI: 10.14028/j.cnki.1003-3726.2015.07.002
        摘要：The application of titanium dioxide (TiO2 ) nanoparticles in polyethylene terephthalate (PET) has become a research hotspot in recent years,due to its small particle size,high specific surface area, excellent UV shielding ability and catalytic activity. This paper introduced the structural characteristics, preparation methods of different morphology and the surface modification of nano-TiO2,this paper also discussed the crystallization and mechanical properties of PET/TiO2 nanocomposites with different loading and structure of nano-TiO2. Furthermore, this paper also summarized the UV- shielding properties and photo-aging resistances of PET/TiO2 nanocomposites. At the same time, the research progress of catalytic, antibacterial,deodorant and self-cleaning properties of PET/TiO2 nanocomposites were summarized. Finally,the future applications of nano-TiO2 in PET were prospected.  
        关键词：Nano titanium dioxide;Polyethylene Terephthalate;Composite;Property   
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        发布时间：2022-09-18
      • Hao WANG,Jing JIN
        Vol. 28, Issue 7, Pages: 17-24(2015) DOI: 10.14028/j.cnki.1003-3726.2015.07.003
        摘要：The need to optimize mechanical properties and thermal properties has motivated the development of flame retardant polypropylene system for several decades. The recent research progress of intumescent flame retardant polypropylene is reviewed in this paper, including developments of novel charring agents and new techniques on modification of flame retardant systems. Meanwhile, the synergistic effect of the flame retardant system on the mechanical properties is introduced in flame retardant polypropylene; especially on the impact strength of flame retardant polypropylene. The trends of the future development of the flame retardant polypropylene system have been proposed.  
        关键词：Flame retardant polypropylene;Mechanical properties;Intumescent flame retardant system;Synergistic effect   
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        发布时间：2022-09-18
      • Hong-liang HUANG,Cheng-wu ZHENG,Jian-hua CAO,Xing ZHANG,Rui-mao HUA
        Vol. 28, Issue 7, Pages: 25-35(2015) DOI: 10.14028/j.cnki.1003-3726.2015.07.004
        摘要：Phosphorescent materials have attracted considerable attention due to their ability to efficiently utilize both singlet and triplet excitons. Polymer metal complex phosphorescent materials have the advantage of excellent light emission characteristics like small molecule metal complexes,and excellent physical properties like polymer materials, such as flexible, solution processable and good film-forming property. In this paper, the recent progress of polymer metal complex phosphorescent materials is summarized. The synthesis of polymer-metal complexes and their application in organic electroluminescent devices (OLED) are reviewed. Combined with the molecular design viewpoint and the achievement in the preparation of electrophosphorescent lightemitting polymers, the problems of the application of this kind of polymers in electroluminescent procedure are summarized, and our perspectives of the future development of this kind of polymers are also given.  
        关键词：Metal complex;Organic light-emitting diodes;Polymer phosphorescent materials   
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        发布时间：2022-09-18
      • Hai-zhen YANG,Yi XU,Zhi-jiang CAI
        Vol. 28, Issue 7, Pages: 36-42(2015) DOI: 10.14028/j.cnki.1003-3726.2015.07.005
        摘要：Poly(ethylene oxide) (PEO) is a kind of multifunctional water-soluble polymer, widely used in various fields because of its good water solubility, low toxicity and easy preparation, etc. This paper introduces the development of PEO composite nanofibers prepared by electrospinning in recent years at home and abroad, focusing on the CS/PEO, PANi/ PEO, SA/PEO, Cellulose/PEO and MEH-PPV/PEO composite nanofibers in the fields of sensors, tissue engineering scaffolds,filter materials,wound dressings,electromagnetic shielding materials. The potential applications and prospect of PEO composite nanofibers have also been described.  
        关键词：Electrospinning;Poly (ethylene oxide);Nanofibers;Composite   
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        发布时间：2022-09-18
      • Jie XU,Wei LI,Chuan-zhuang ZHAO,Chao GUAN,Zhong-ren CHEN
        Vol. 28, Issue 7, Pages: 43-51(2015) DOI: 10.14028/j.cnki.1003-3726.2015.07.006
        摘要：Ultra-high molecular weight polyethylene (UHMWPE), linear low density polyethylene (LLDPE) and polyethylene wax (PE-wax) were used to prepare UHMWPE /LLDPE and UHMWPE /PE-wax blends with relatively low UHMWPE concentrations. The influence of different concentrations of UHMWPE on the formed structure of UHMWPE chain entanglement in two blends,especially the critical concentration of onset of entanglement,was investigated by applying small oscillatory shear rheology and scanning electron microscope. The compatibility of UHMWPE/LLDPE blends was good according to rheological tests. It is suggested that when the concentration of UHMWPE in UHMWPE/LLDPE blends is higher than 1. 68%(wt),the blends perform as solid gel independent of frequency at region of low frequency in frequency sweep curves,at the same time, the storage modulus begins to increase in time sweep curves. And with PE wax as a lower molecular weight matrix, the storage modulus of UHMWPE/PE-wax blends increase significantly, when the concentration of UHMWPE in UHMWPE/PE-wax blends is higher than 0. 84% (wt). Furthermore, the emergence of filaments in images of brittle fracture surface of UHMWPE/PE-wax blends coincidently begins at the concentration of 0.84% (wt). In conclusion, UHMWPE forms entanglement structure in the blends with UHMWPE concentrations above a critical value of c = 0. 84% (wt),four times the critical overlap concentration.  
        关键词：UHMWPE;chain entanglement;Blends;Rheology   
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        发布时间：2022-09-18
      • Shu-hong LI,Hong-xia YANG,Liang-chun LI,Cai-hong XU
        Vol. 28, Issue 7, Pages: 52-56(2015) DOI: 10.14028/j.cnki.1003-3726.2015.07.007
        摘要：Novel silabifluorene polymer containing bis(silicon-bridged bispiro-p-terphenyl) was synthesized, the polymer was luminescent in solid state with a maximum emissive wavelength about 408nm, and demonstrated the strong deep blue emission. The thermal gravimetric analysis (TGA) curve of the polymer showed the good stability. The polymer would be the potential material in fluorescent application.  
        关键词：Spiro;Silicon-bridged;Silafluorene polymer;Deep blue emission in solid state   
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        发布时间：2022-09-18
      • Biao WANG,Tong WAN,Wei ZENG
        Vol. 28, Issue 7, Pages: 57-64(2015) DOI: 10.14028/j.cnki.1003-3726.2015.07.008
        摘要：The poly (lactic acid) (PLA) was modified with three kinds of light stabilizer, UV-944, UV-531, UV-9 and antioxidant 7910,glycidyl methacrylate (GMA) and Triphenyl phosphate (TPP). The thermal stabilities of all modified specimens were studied by gel permeation chromatography (GPC) and rheological tests. The results showed that weight- average molecular weights of neat PLA pellet declined from 136000 to 101000 by melt-blending and press-molding. After heat treatment at 180℃ for 5h,weight-average molecular weight of pure PLA declined from 101000 to 37000,while that of PLA modified with 0. 25%(wt) TPP decreased from 101000 to 91000. The storage modulus and complex viscosity of PLA modified with 0. 25 % (wt) TPP remained constant within the studied range. These results indicate that the introduction of TPP effectively prevent thermal degradation of PLA. Weight-average molecular weights of PLA modified with UV-944 and antioxidant 7910 were maintained at about 133000 and 121000,respectively. UV-944 and antioxidant 7910 effectively improve the thermal stability of the PLA matrix. UV-944 and antioxidant 7910 together have a synergetic effect on the improved thermal stability of PLA, while other compound additives have little improvement on thermal stability of the matrix.  
        关键词：Poly (lactic acid);Thermal stability;Additive;Molecular weight   
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        发布时间：2022-09-18
      • Yu-qing LI,Ting-ting LI,Zhi-ming ZHANG,Zhi-yuan WANG
        Vol. 28, Issue 7, Pages: 65-69(2015) DOI: 10.14028/j.cnki.1003-3726.2015.07.009
        摘要：Polyvinyl alcohol (PVA) nanofiber membranes were prepared by electrospinning technique. Influence of conditions (temperature, pressure, time) on the water stability of PVA fiber membrane after hot pressing were studied. With temperature increased, the water stability of PVA fiber membranes was raised. ATR-IR showed improvement of water stability act through different mechanisms during hot press processing at different temperatures (50℃, 100℃, 155℃ ). Scanning electron microscopy and water stability tests showed that hot pressing treatment at lower temperature had reached the same results as obtained by the pure heat treatment at higher temperature because of synergistic effect of pressure. When the pressure was larger than 4MPa, the water stability of the fiber membrane appeared no obvious promotion. There was a clear difference about the effect of hot pressing time on the stability of PVA fiber membrane in water treated at different temperatures. Combined performances with water stability of PVA, the best conditions of hot pressing processing were 100℃,4MPa and 2min.  
        关键词：Electrospinning;Polyvinyl alcohol;Nanofiber membrane;Hot pressing processing;Water stability   
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        发布时间：2022-09-18
      • Ya-po TIAN,Shuo ZHANG,Qiao-yuan HUANG,Ding-ce HUANG,Wei-ke CHEN
        Vol. 28, Issue 7, Pages: 70-77(2015) DOI: 10.14028/j.cnki.1003-3726.2015.07.010
        摘要：(N, N-dimethyl-N-methacryloyloxyethyl) ammonium propyl sulfonate (DMAPS) was synthesized by methacryloxy ethyl dimethyl amine (DM) and 1,3-propane sultone. Through free radical polymerization, polyampholyte copolymer P(AA-co-DMAPS) was prepared from DMAPS and AA in which ammonium persulfate as the initiator and sodium hypophosphite as chain transfer agent. DMAPS and P(AA-co-DMAPS) were characterized by FT-IR, 1 H NMR and GPC. The effect of reaction parameters on the dispersion of ceramic slurries was studied by the method of single factor experiment and orthogonal experiment. The viscosities of ceramic slurries were also compared with poly (acrylic acid) (PA) and sodium tripolyphosphate (STP). The results showed that the optimum parameters for P(AA-co-DMAPS) was at 80 ℃ of reaction temperature, with molar ratio (AA: DMAPS= 2:1). Moreover, the results showed that P(AA-co-DMAPS) had excellent water-reducing capacities, which indicated that P (AA-co-DMAPS) can be used as potential water-reducer for ceramic industry.  
        关键词：DMAPS;P(AA-co-DMAPS);Ceramic superplasticizer;Dispersion   
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        发布时间：2022-09-18
      • Xia LI,Long XIE,Qiao-ling LI
        Vol. 28, Issue 7, Pages: 78-85(2015) DOI: 10.14028/j.cnki.1003-3726.2015.07.011
        摘要：Caboxymethyl-β-cyclodextrin (CM-β-CD) not only can form inclusion complexes with the other compounds because of the cavity of CD, but also can increase the hydrogen-bonding, electrostatic and dipole-dipole interactions between hosts and guests due to the presence of carboxymethyl. Functional materials with excellent properties can be prepared by modifying CM-β-CD,and these materials have been widely used in pharmaceuticals, separation, biological sciences, environmental protection and wastewater treatment. This paper analyzed the properties of CM-β-CD and reviewed the preparation of CM-β-CD functional materials,such as CM-β-CD polymers, composites and modified biomolecules in recent years. The adsorption of CM-β-CD functional materials for organic molecules,biomolecules and metal iones were also summarized. Moreover, the development of CM-β-CD functional materials was prospected and some suggestions were proposed.  
        关键词：Carboxymethyl-β-cyclodextrin;Functional materials;Preparation;Adsorption properties   
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        发布时间：2022-09-18
      • Xiao-ming CHEN
        Vol. 28, Issue 7, Pages: 86-88(2015) DOI: 10.14028/j.cnki.1003-3726.2015.07.012
        摘要：Branched structure has a significant influence on polymer rheological properties such as shear viscosity, viscous flow activation energy and melt fracture phenomenon. In this paper the relationship between branched structure of polymer and rheological properties was summarized. Understanding the relationship between branched structure of polymer and rheological properties would help students to grasp the structure-property relationship of polymer materials and series- connect the knowledge of polymer physics, polymer rheology and polymer processing.  
        关键词：Polymer;Branched structure;Rheological properties   
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        发布时间：2022-09-18
      • Hui-yu BAI,Jing LUO,Cai-hua NI,Wei-fu DONG,Xiao-ya LIU,Ming-qing CHEN
        Vol. 28, Issue 7, Pages: 89-94(2015) DOI: 10.14028/j.cnki.1003-3726.2015.07.013
        摘要：Polymer Rheology is the study of the flow and deformation of polymer materials. Polymer rheology is a key course in the process of polymer undergraduate teaching, and both its status and role are obvious. Polymer rheology course is different from the general rheology course, which has its own characteristics. So its frontier of the study is highlighted and the practicality is also emphasized in the process of teaching. In this paper, according to the teaching experience of polymer rheology course from USA's university, a series of reform ideas are put forward in view of the problems existing in the polymer rheological teaching of the polymer material and engineering in our school,which can provide reference for the reform of polymer rheology teaching of the university.  
        关键词：Polymer material and engineering;Polymer rheology course;Teaching;Improvement;The innovation ability   
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        发布时间：2022-09-18
      • Ting OU-YANG
        Vol. 28, Issue 7, Pages: 95-98(2015) DOI: 10.14028/j.cnki.1003-3726.2015.07.014
        摘要：Polymer rheology is a specialized course for students who majoring in polymer science and engineering. It has a strong interdisciplinary characteristic and it serves as a key course linking polymer physics and polymer processing. It is considered to be an important part in establishing a sound undergraduate teaching-system. The paper presents an exploration of various teaching aspects on polymer rheology curriculum with an aim in improving the teaching quality. It is started in this paper with a clear indication of teaching objective based on course characteristics set in Hunan university. Several textbooks and reference materials were suggested and the structure of teaching program and contents were optimized. Diversified teaching methods were also explored to further motivate students during course study.  
        关键词：Polymer rheology;Undergraduate teaching;Improvement   
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        发布时间：2022-09-18
      • Xue-jing ZHENG,Ying PEI
        Vol. 28, Issue 7, Pages: 99-103(2015) DOI: 10.14028/j.cnki.1003-3726.2015.07.015
        摘要：University students are the most active groups of youth. They are entrusted with the duty of the great rejuvenation of the Chinese nation and the construction of China. From a certain extent, the university students decide the future of a country. One of the important contents of university education is to pay close attention to the humanism of students, especially students of science and engineering,and guide the students to the construction of spiritual civilization. Chinese traditional culture is the crystallization of Chinese wisdom. Only by selecting the essence of traditional culture, inheriting and promoting the virtues, can we revitalize China. The authors properly combine the Chinese traditional culture with the professional knowledge during the course Natural Polymers and enhance the students' understanding of the traditional culture. The scientific thinking way, moral level and heart training is not only conducive to the students' scientific literacy,more important, they sublimes the students' moral integrity and help them grow up as new century talents with political integrity and professional competence.  
        关键词：Natural polymers;Traditional culture;Scientific research;Political integrity and professional competence   
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        发布时间：2022-09-18
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