最新刊期
卷 25 ， 期 12 ， 2012
- 摘要：The fact reflecting the increase of impact of Chinese polymer scientists in the world has been summarized. The forum on frontiers of several field in polymer science were briefly introduced. The issues concerning of polymer program at NSFC were discussed. The data of funding, the grants distribution to individual institution, and comparison of increasing in application with other disciplines have been analyzed. The guidance and suggestions to NSFC proposals for 2013 were given in detail.关键词：Development of polymer science;Frontier of polymer science;Funding of NSFC
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发布时间：2022-09-18 - 摘要：Composite systems of microspheres and three-dimensional scaffolds obtained by combining growth factor-containing microspheres and three-dimensional tissue engineering scaffolds can spatiotemporally and sequentially control release of various growth factors, meeting the need of different growth factors at different stages of new tissue formation. In this paper, the preparation methods of microsphere-scaffold systems are summarized based on the merits and drawbacks of microspheres and scaffolds for growth factor-release carriers. Three methods are included, i.e., bottom up, post-seeding method and directly incorporating method. Research progresses and developments in the composite systems of microspheres and three-dimensional scaffolds for controlled growth factor release in ideal tissue regeneration are reviewed in detail. The drug release mechanism, challenges and development potential of the composite systems of microspheres and three-dimensional scaffolds are also mentioned.关键词：Microsphere;Tissue engineering scaffold;Microsphere-scaffold system;Growth factor;Controlled release
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发布时间：2022-09-18 - 摘要：This paper refers to three kinds of thermo-analysis combination techniques, including thermo- gravimetric analysis coupled with Fourier transform infrared spectrometry (TG-FTIR), pyrolysis gas chromatography-mass spectrometry (Py/GC-MS), and thermo-gravimetric-mass spectrum (TG-MS). The review introduces the test methods and principles. The application and development of these combination techniques in the high-temperature resistant polymer in recent years supply practical research methods for material thermal decomposition process and mechanism. This paper also looks forward to the inspect of these methods during the development of thermo-analysis.关键词：Combination techniques;TG;FTIR;MS;GC;Thermo-decomposition
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发布时间：2022-09-18 - 摘要：Recently, increasing attention has been paid to the combined incorporation of siloxane moieties and fluorinated groups into synthetic materials. As a class of novel heteroatom-containing material, this fluorine- and silicon-containing material not only possesses outstanding thermal stability of siloxane and excellent surface self-cleaning performance of organic fluoropolymer, but also has great processing property of silicone polymers. Owing to its superior properties, the fluorosilicone material has become a research hotspot in the field of new materials. Whether in self-assembly, anti-fouling, superhydrophobic or in anti-high-temperature materials, it has a potential application. The current investigation progress of this material is summarized and the material performances are briefly described in this review, simultaneously the coming research fields are prospected.关键词：Fluorosilicone polymer material;Anti-fouling;Superhydrophobic;Self-assembly;Thermal property
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发布时间：2022-09-18 - 摘要：A large number of waste Poly(vinyl butyral) (PVB) films have been produced with widely application of PVB films in the field of car windshields, building safety glass and solar photovoltaic package. The recycling and reusing of waste PVB films is being drawn more and more attention due to the issues of raw materials, cost and environment pollution. In this paper, the current situation of research and application is reviewed in reusing of the recycled PVB films. The researches on this area are summarized and analyzed from many aspects, such as decolorization of colored PVB films, making waste PVB films as toughening agent of plastics, preparing PVB composites and dissolving waste PVB as coating or adhesive. The advice is proposed to the research on the reusing and modification of waste PVB films in the future.关键词：Recycled poly(vinyl butyral) films;Toughening agent;PVB composites;Decoloring
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发布时间：2022-09-18 - 摘要：Cyclodextrins (CDs) are cyclic oligosaccharides composed of D-glucose units that are joined by α-1,4-glucosidic linkages, which contain a hydrophilic outer surface and a hydrophobic cavity. Cyclodextrin and its derivatives can form inclusion complexes with suitable hydrophobic guest molecules through host-guest interaction. This review describes the structure and property of the cyclodextrin and the design principles, mechanisms, stimuli responses, and applications of the supramolecular assemblies such as nanoparticles, hydrogels, etc, based on cyclodextrins in recent years.关键词：Cyclodextrin;Supramolecular assembly;Stimuli Response
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发布时间：2022-09-18 - 摘要：The excellent properties of nano-SiO2 particles are restricted largely due to their aggregation and poor dispersion in organic solvents, so chemical modification of SiO2 are necessary to overcome these disadvantages. Atom transfer radical polymerization (ATRP) is an effective way for the modification of nano-SiO2 particles, SiO2-polymer composite materials with the advantages of polymers and inorganic nanoparticles could be synthesized via ATRP on surface modification of the nano-SiO2 particles, and the length and the molecular weight distribution of the grafting chains are both controllable, expand the application of nano-SiO2 particles. The current situation of ATRP, RATRP(reverse ATRP), AGET ATRP(activators generated by electron transfer ATRP) and ARGET ATRP (activators regenerated by electron transfer ATRP)methods used in grafting modification of nano-SiO2 have been reviewed.关键词：Nano-silica;ATRP;Grafting;Modification
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发布时间：2022-09-18 - 摘要：Polyhedral Oligmeric Silsesquioxanes (POSS), as a new kind of organic-inorganic hybrid materials, has attracted great attention in the last decade. With the special cage structure, the polymers incorporating POSS monomers have the simplicity in processing and the excellent comprehensive properties, such as thermal stability, flame retardation, mechanical properties and low dielectric constant. In this paper, the structure and synthesis of POSS, and the mechanism of increasing the flame retardant are described briefly. An overview of the application of POSS in modification of polymer materials to reduce flammability is presented. Additionally, the developing trends of POSS and POSS-based materials in the future are proposed.关键词：POSS;Flame retardant polymers;Mechanism
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发布时间：2022-09-18 - 摘要：Ultra-high molecular weight polyethylene fibers were prepared by dry spinning and the effect of the draw-down ratio on the follow-up draft of UHMWPE was studied on. The extensional forces in the draw-down process were measured at the exit of the spinning duct by tension meter and the tensile stresses of the draw-down were calculated. Based on the two-component model of tensile stress-viscosity,the NskT values were calculated in the fitting process and then the draw-down ratios were determined. The results showed that the maximum follow-up draft ratio was 23.3 and the fiber strength and modulus were 30cN·dtex-1 and 1200cN·dtex-1 respectively when the draw-down ratio was 13.关键词：Ultra-high molecular weight polyethylene fibers;Draw-down ratio;Disentanglement on spinning line;Dry spinning
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发布时间：2022-09-18 - 摘要：polyamine adduct (DETA-PPGDGE-DETA) was synthesized through the reaction between diethylenetriamine (DETA) and polypropylene glycol diglycidyl ether (PPGDGE). Then it was synthesized of waterborne epoxy curing agent by capping of DETA-PPGDGE-DETA with a certain amount of epoxy resin E-20. This waterborne epoxy curing agent was characterized by the infrared spectrum (IR) and time of flight mass spectrograph (TOF-MS). The effect of different reactive conditions on the structure and properties of epoxy curing agent was investigated in this paper. It is indicated that the most excellent coating mixed with curing agent and epoxy emulsion was obtained when the molar ratio of DETA and epoxy group of PPGDGE was 10:1, a small amount of DETA was removed completely by higher boiling diethylene glycol butyl ether (DGBE) and 20% primary amine was capped with E-20.关键词：Waterborne epoxy curing agent;Diethylenetriamine;Film property
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发布时间：2022-09-18 - 摘要：A new amphiphilic polymer polyethylene glycol-eleostearic acid ester (PEG-ESA) was synthesized by esterification using polyethylene glycol and eleostearic acid as reactants. The product was characterized by IR, MALDI-TOF-MS and 1HNMR. The properties of PEG-ESA were explored over both fluorescent probe and surface tension. The zeta potential and partical size of micellar solutions of PEG-ESA were studied in different conditions. The critical micelle concentration (CMC) of PEG-ESA was 1.1×10-5g/L, the water solubility of pyrene was enhanced by micellar solution of the new aliphatic ester. The micelle of PEG-ESA was stable and reached nanoscale under certain conditions.关键词：Eleostearic acid;Polyethylene glycol;Amphiphilic polymer
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发布时间：2022-09-18 - 摘要：Polylactic acid is a widely used biodegradable material,which,together with its copolymers,are now among the most important biomedical materials. Due to the shortage of polylactic acid (PLA) as a biomedical material, their applications in biomedicine engineering have been limited.The studies on the modifications of PLA are attractive to the researchers in this field. In this paper, recent research progress in modifications of PLA is summarized. After these processing, the mechanical, degradation, hydrophilic and bioactive properties of PLA may be improved and the demands for the biomedical application can be met.关键词：Polylactide;Modification;Biomedicine fields;Progress
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发布时间：2022-09-18 - 摘要：The fabrication of chemically modified electrode is an active researching field of electrochemistry and electroanalytical chemistry.The modification of electrode with functional polymer film is contributed to the addition of unique functions to electrodes, including selectivity, molecular recognition, pH sensitive, photochemical sensitive and so on, due to the extraordinary structures of the functional polymer films. The unique functions broaden the range of applications of those modified electrodes, and attract more and more attentions. This paper reviews the approaches and the utilized materials of constructing functional polymer films on the electrode in terms of the fabrication of molecular imprinting polymer sensors (MIP sensors) and enzyme sensors, emphasizing on the new applications of electrodeposition in the modification of electrodes. Those approaches could be widely applied to the fabrication of other sensors, possessing an important value of research and applications.关键词：Chemically modified electrode;Polymer films;Molecular imprinting polymer;Enzyme;Sensors
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发布时间：2022-09-18 - 摘要：According to the multidisciplinary, strong theory and practice characters of polymer rheology, and the author's teaching practice, some experiences in polymer rheology were summarized. It was proposed that the visualization of teaching content and teaching method should be valued to cultivate the students' interest in study. The teaching methods combined the theory with practice by virtue of experiment class, showing practice process video, pictures, and so on, could eliminate abstract sense of students in learning this course. In addition, proper class design and guide which could improve the students, enthusiasm and the training of the students' autonomous learning awareness, were put forward by teaching examples.关键词：Polymer rheology;Teaching;Teaching methods
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发布时间：2022-09-18 - 摘要："Polymer Chemistry" is one of the excellent courses in South China University of Technology (SCUT), which is also the core professional course for polymer material and engineering specialty in SCUT. Good foundation in polymer chemistry would help the students to understanding the following professional curriculum in the field of material science and engineering. In this paper, several suggestions, including interactive and visualized teaching, case teaching, combined with scientific research and promoting the innovation ability of students, were put forward according to teaching practice and exploration of the polymer chemistry course and the professional engineering discipline characteristics, which might help to improving the students' innovation ability and the interest in learning.关键词：Polymer chemistry;Engineering course characteristics;Teaching reform
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发布时间：2022-09-18
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