摘要:Owing to unique properties of ferrocenyl polymer such as redox,electricity and magnetism,its supramolecular systems have extensive applied prospects in sensor,catalysis,molecular electronics,biological and medical fields.In this paper,the recent progress in the studies on construction and properties of supramolecular systems of ferrocenyl linear polymer and ferrocenyl dendrimer was reviewed,and future development of ferrocenyl polymer was prospected.
摘要:In this review, functions and classification of compatibilizer were introduced. And several kinds of in-situ reactive compatibilization for polymer blends were described in detail. We also introduce some kinds of function group reaction in-situ compatiblization system such as the system with maleic anhydride and the system with glycidyl methacrylate. At the same time, the in-situ compatibilization mechanisms were demonstrated.
摘要:Aliphatic polyester_amides combine the advantages of both polyesters and polyamides. For example they have better mechanical properties and processabilities. Therefore they have become a major concern in scientific fields.The present paper starts with the model compound of aliphatic polyester_amide (taken bisamide_diol for example). The structure characteristics of the model compound are described, and the relationships between the model compound and its corresponding polymer are analyzed, which forms the basis of investigating the polymer. In present paper, the classification of aliphatic polyester_amides and the synthesis methods of different kinds of aliphatic polyester_amides are reviewed. The application fields of aliphatic polyester_amides are also described.
摘要:In this paper, the principles and characters of microwave which assisted organic reactions were introduced. And the applications of microwave irradiation to chitosan polymer materials were reviewed.
摘要:In this paper,a review of the literatures is presented for the kinetics of the hydrolysis of alkoxysilanes and the condensation of homo-and hetro-alkoxysilanes.The main factors that affect the kinetics of hydrosis of alkoxysilanes are discussed.
摘要:The interaction between nano-SiO2 and radiation-vulcanized EPDM rubber has been characterized by Kraus equation, IR and crosslinking density. Kraus curve shows that there was interaction between the filler and EPDM rubber. IR results exhibit that the interactions between the filler and EPDM rubber are chemical adsorption, which is difficult to be destroyed in tetrahydrofuran. The crosslinking density obtained by swelling to balance indicates that there is physical and chemical adsorptions, and the interaction may be mainly composed of physical adsorption.
摘要:The reaction process of PAMAM/DGEBA curing system was carefully analyzed by DSC.The apparent activation energy(ΔE) was 59.78kJ/mol,which was calculated by Kissinger method.The reaction order n=0.91, which was calculated by Crane method.Reaction rate constants k and frequency factor A in various temperature were also calculated according to Crane method.The curing technique were determined by DSC analysis,the suitable curing temperature was 80~90℃ and the post-curing temperature was 140℃.
摘要:Photonic crystals (PCs) are periodic dielectric-structure materials with a photonic bandgap for electromagnetic waves. By combining stimuli-sensitive material with photonic crystals, the formed photonic crystals can respond to the external environments, which are named as responsive photonic crystals. Being a new branch of photonic crystals, responsive photonic crystals have attracted considerable attention as applications in sensors, biomedicine, clinical assay, sensor etc in recent years. According to difference of external environments, responsive photonic crystals can be briefly classified into three different types, chemical responsive photonic crystals, physical responsive photonic crystals and biological responsive photonic crystals. In this article, we mainly review the progress in chemical responsive photonic crystals in recent years, including metal ion-responsive, pH-responsive, redoxresponsive, glucose-responsive and photochemistry-responsive photonic crystals.
摘要:Hybrid organic-inorganic membranes have attracted much attention recently because they possess both advantages of the organic and inorganic membranes. Hybrid organic-inorganic membranes are being classified into two categories according to the links between the organic and inorganic components. This article especially concentrates on the hybrid organic-inorganic separation membranes with chemical bonds between components. The main properties of this kind of hybrid membranes are briefly discussed, and the important influence factors on the morphology and characteristics are illustrated, as well as the application in the separation process is introduced. Finally, a brief comment on their development was given.
关键词:Separation membranes;Hybrid membranes;Organic-inorganic hybrid;Hybrid material
摘要:Hybrid organic-inorganic particles in nanoscale have many excellent properties such as little scale effect, low density, high transparence, etc. So they have a lot of potential application in many fields and arouse much interest of scientists all over the world. In this article, several main methods to elaborate this kind of material are introduced and the characters of these methods are explained. These methods include synthesis in colloidal assembles, via polymerization techniques, through polymer and nanoparticles assemble and by polymerization of special monomer in one step.
摘要:The preparation methods,properties and development progress in recent years of nylon-based nanocomposites materials were introduced in this paper. The reinforcing and toughening mechanisms of nanocomposites were discussed mainly from the influences of nanoparticles on the crystallization behaviors of composites materials as well as the interfacial interaction between nanoparticles and nylons.In addition,the application prospect of nylon-based nanocomposites was also reviewed.
摘要:Benzocyclobutenes is a high performance polymer material.It can be widely used in many fields and has the benefits for commercial development.The methods to syntheses the monomer,derivate and polymers of benzocyclobutene were introduced in this paper,meanwhile,the application in the research and engineer were also presentated briefly.
摘要:Starch,a natural material,has caught the worldwide attention because of its biodegradability, reproducibility and low cost.In this paper the development of TPS in recent years is reviewed,and the preparation, mechanical properties and application of TPS are mainly discussed.
摘要:The widely research on the temperature-sensitive hydrogel suitable for drug controlled-release carrier has been carried out in recent years. In this paper, the structure and properties of the temperature-sensitive hydrogel, technology of drug encapsulation and release mechanism are simply introduced, and its application situation in the field of drug controlled-release is reviewed in detail.
摘要:Demulsifying agent is a kind of necessaries on oil gathering fields.Since the chemical composition of crude oil is complicated and many other factors affect the emulsion process,it is difficult to choose exact demulsifying agent for exact oil.This article starts with mechanism of crude oil emulsion,analyzes stability reasons,break theory, molecular structure and emulsion breaking performance,finally summaries the potential characters of excellent demulsifying agents.