检索结果-南通市图书馆

Chinese Journal of Polymer Science 2008年第2期26卷 131-143页

作者： ismet kaya Süleyman Çulhaoglu Department of Chemistry Faculty of Science and Arts Çanakkale Onsekiz Mart University TR 17020 Çanakkale Turkey

The oxidative polycondensation reaction conditions of 2-[(2-hydroxyphenyliminomethylbenzylidene)amino- phenol](2-HPIMBAP)has been accomplished by using air O_2 and NaOCl oxidants in an aqueous alkaline medium between 50-90℃.The optimum reaction conditions of the oxidative polycondensation and the main parameters of the process were *** the optimum reaction conditions,yield of the products were found to be 67.72% and 61.49% for air O_2 and NaOCl oxidants *** structures of the monomer ...

关键词： Air oxygen NaOCl Oligo[2-(2-hydroxyphenyliminomethylbenzylidene)aminophenol] Oxidative polycondensation Themal analysis Electrical conductivity Antibacterial activities.

SYNTHESES AND CHARACTERIZATIONS OF OLIGO(AZOMETHINE ETHER)S DERIVED FROM 2,2'-[1,4-ENYLENEBIS(METHYLENEOXY)]DIBENZALDEHYDE AND 2,2'-[1,2-PHENYLENEBIS(METHYLENEOXY)]DIBENZALDEHYDE

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Polymer Science 2012年第5期30卷 682-693页

作者： ismet kaya Süleyman Culhaoglu Canakkale Onsekiz Mart University Faculty of Science and ArtsDepartment of ChemistryCanakkale 17020Turkey

The oligo（azomethine ether）s were synthesized via polycondensation of alkyl diamines with aromatic dialdehydes. Two series of dialdehydes, namely 2,2＇-[1,2-phenylenebis（methyleneoxy）]dibenzaldehyde [2,2＇-1,2-（PBMODB）] and 2,2＇- [1,4-phenylenebis（methyleneoxy）]dibenzaldehyde [2,2＇-I,4-（PBMODB）] were prepared from the condensation reactions of salicylaldehyde with o-xylenedibromide and p-xylenedibromide, respectively. The structures of dialdehydes and oligomers were determined by FT-IR, 1H-NMR and 13C-NMR. The thermal analyses of oligomers were conducted by DSC and TG/DTA techniques, respectively. Size exclusion chromatography （SEC） technique was also used to determine molecular weights and molecular weight distributions of oligomers. Electrochemical properties of the synthesized products were investigated.

关键词： Polyazomethine Thermal analysis Dialdehyde Oligoazomethine.

SYNTHESIS,CHARACTERIZATION,THERMAL ANALYSIS,CONDUCTIVITY AND BAND GAPS OF OLIGO {4-[(2-HYDROXYL-1-NAPHTHYL)METHYLENE]AMINOBENZOIC ACID}

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Polymer Science 2009年第2期27卷 209-219页

作者： ismet kaya Ali Bilici Department of Chemistry Faculty of Science and Artsanakkale Onsekiz Mart UniversityTR-17020anakkaleTurkey Department of Chemistry Faculty of ScienceAnkara UniversityTandoganAnkaraTurkey

The oxidative polycondensation reaction conditions of 4-[(2-hydroxyl-1-naphthyl)methylene]aminobenzoic acid (4-HNMABA) with H2O2,air O2and NaOCl were studied in an aqueous alkaline medium between 40℃and 90℃.The structure of oligo {4-[(2-hydroxyl-1-naphthyl)methylene]aminobenzoic acid} (O-4-HNMABA) was characterized by using1H-NMR,13C-NMR,FT-IR,UV-Vis,size exclusion chromatography (SEC) and elemental analysis *** the optimum reaction conditions,the yield of O-4-HNMABA was found to be 70% for H2O2oxidant,94% for air O2oxidant and 87% for NaOCl *** to the SEC analysis,the number-average molecular weight (Mn),weight-average molecular weight (Mw) and polydispersity index (PDI) values of O-4-HNMABA were found to be 850,1350 and 1.59,using H2O2,1800,2200 and 1.22,using air O2and 2200,3000 and 1.36,using NaOCl,***-DTA analyses showed that O-4-HNMABA was more stable than *** highest occupied molecular orbital,the lowest unoccupied molecular orbital and electrochemical energy gaps (E′g) of 4-HNMABA and O-4-HNMABA were found to be -6.34,-6.56; -2.67,-3.04;3.67 and 3.52 eV,respectively,by cyclic voltammetry (CV).According to UV-Vis measurements,optical band gaps (Eg) of 4-HNMABA and O-4-HNMABA were found to be 3.12 and 3.03 eV,respectively.

关键词： Oligo {4-[(2-hydroxyi-1-naphthyl)methylene]aminobenzoic acid} Oxidative polycondensation Conductivity Electrochemical and optical band gaps.

SYNTHESIS,CHARACTERIZATION AND ANTIMICROBIAL PROPERTIES OF 4-[(4-HYDROXYBENZYLIDENE)AMINO]PHENOL AND ITS POLYMER

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Chinese Journal of Polymer Science 2007年第5期25卷 461-472页

作者： ismet kaya Suleyman Culhaoglu Dilek Senol Department of Chemistry Faculty of Science and Arts Canakkale Onsekiz Mart University TR-17020 Canakkale Turkey

The oxidative polycondensation reaction conditions of 4-[（4-hydroxybenzylidene） amino] phenol （4-HBAP） were studied with H2O2, air oxygen and NaOCl in an aqueous alkaline medium between 50 and 90℃. The structures of the obtained monomer and polymer were confirmed by FT-IR, UV-Vis, 1H- and 13C-NMR and elemental analysis. The characterization was made by TG-DTA, size exclusion chromatography （SEC） and solubility tests. At the optimum reaction conditions, the yield of poly[4-（4-hydroxybenzylidene amino） phenol] （P-4-HBAP） was found to be 48.3% （for H2O2 oxidant）, 80.5% （for air O2 oxidant） and 86.4% （for NaOCl oxidant）. According to the SEC analysis, the number-average molecular weight （Mn）, weight-average molecular weight （Mw） and polydispersity index （PDI） values of P-4-HBAP was found to be 8950, 10970 g tool^-1 and 1.225, respectively, using H202; and l l610, 15190 g tool^-1 and 1.308 respectively, using air 02 and 7900, 9610 g mol^-1 and 1.216, respectively, using NaOC1. According to TG-DTA analyses, P-4-HBAP was more stable than 4-HBAP against thermal decomposition. The weight loss of P-4-HBAP was found to be 49.27% at 1000℃. The highest occupied molecular orbital （HOMO） and the lowest unoccupied molecular orbital （LUMO） values calculated from electrochemical measurement. Electrochemical energy gaps （Eg＇） of 4-HBAP and P-4-HBAP were found to be -5.46, -5.28; -2.26, -2.67; 3.20 and 2.61 eV, respectively. According to UV-Vis measurements, optical band gap （Eg） of 4-HBAP and P-4-HBAP were found to be 3.34 and 3.01 eV, respectively. Also, antimicrobial activities of 4-HBAP and P-4-HBAP were examined against selected some bacteria. The electrical conductivity of the polymer was measured after doping with iodine.

关键词： Air oxygen H2O2 NaOCl Poly[4-(4-hydroxybenzylidene amino) phenol] Oxidative polycondensation Thermal analysis Conductivity Antimicrobial and bad gap.

SYNTHESIS,CHARACTERIZATION AND THERMAL DEGRADATION KINETICS OF POLY(IMINO ISOPHTHALOYL IMINO (2,4,8,10-TETRAOKSOASPIRO [5,5] UNDEKAN-3,9-DIPROPYLENE))

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Polymer Science 2008年第1期26卷 47-53页

作者： Fatih Do■an Hakan Akat ismet kaya Department of Chemistry Faculty of ScienceEge Universityzmir-TURKEY Department of ChemistryFaculty of Arts and Scienceanakkale Onsekiz Mart Universityanakkale-TURKEY Department of Chemistry Faculty of ScienceEge Universityzmir-TURKEY Department of Chemistry Faculty of Arts and Scienceanakkale Onsekiz Mart Universityanakkale-TURKEY

A new polymer,poly(imino isophthaloyl imino(2,4,8,10-tetraoksoaspiro[5,5]undekan-3,9-dipropylene)) [poly(IPIT)]was synthesized by an interfacial polycondensation *** characterization of poly(IPIT)was conducted by using FT-IR,^(13)C-NMR,TG and DTA *** kinetics of the thermal degradation of poly(IPIT)was investigated by thermogravimetric analysis at different heating *** curves showed that the thermal decomposition of poly(IPIT) occurred in three *** apparent activation energie...

关键词： Thermal degradation Kinetic method Polyamide

SYNTHESES AND CHARACTERIZATION OF POLY(IMINOPHENOL)S DERIVED FROM 4-BROMOBENZALDEHYDE:THERMAL,OPTICAL,ELECTROCHEMICAL AND FLUORESCENT PROPERTIES

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Polymer Science 2012年第6期30卷 796-807页

作者： ismet kaya Ali Avci Özlem Gültekin Canakkale Onsekiz Mart University Faculty of Sciences and ArtsDepartment of Chemistry17020CanakkaleTurkey Celal Bayar University Faculty of Sciences and ArtsDepartment of Chemistry45040ManisaTurkey

Schiff base monomers [2-（4-bromobenzylideneamino）phenol and 2-（4-bromobenzylideneamino）-5-methylphenol] were synthesized by the condensation reaction of 4-bromobenzaldehyde with aromatic aminophenols. Then, the monomers were converted to their polyphenol derivatives by oxidative polycondensation reactions （OP） in an aqueous alkaline medium. The structures of the synthesized compounds were characterized by solubility tests, FT-IR, NMR, TG-DTA, DSC and SEC techniques. The HOMO-LUMO energy levels and electrochemical （E＇g） and optical （Eg） band gaps were calculated from cyclic voltammetry （CV） and UV-Vis measurements, respectively. Cyclic voltammetry （CV） was used to determine the electrochemical oxidation-reduction characteristics. Optical properties were investigated by UV-Vis and fluorescence analyses. Solid state electrical conductivities were measured on polymer films by four point probe technique using a Keithley 2400 electrometer. The effects of electron-donating （--CH3） group at p-position of --NH2 group in aminophenol on electrochemical and thermal properties were also discussed. Photoluminescence （PL） properties of the synthesized materials were determined in solution forms using different solvents. Fluorescence measurements were carried out in various concentrated solutions to determine the optimum concentrations to obtain the maximal PL intensities.

关键词： Schiff base polymers Thermal analysis Fluorescence Cyclic voltammetry Conductivity.

SYNTHESIS AND CHARACTERIZATION OF A NEW DYESTUFF POLYMER SOLUBLE IN ALKALINE AQUEOUS MEDIA

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Polymer Science 2013年第12期31卷 1632-1646页

作者： ismet kaya Aysel Ayd n Kevser Temizkan Canakkale Onsekiz Mart University Faculty of Sciences and ArtsDepartment of ChemistryPolymer Synthesis and Analysis Laboratory

Novel dyestuff polymers were successfully obtained through oxidative polymerization technique. The synthesized Schiff base and its polymer were soluble in alkaline＇aqueous medium and they have various colors in different solutions. Also, it can be said that the synthesized compounds are suitable as coloring agent （dyestuff） for textile applications. Fluorescence properties of the compounds were determined in DMF with different concentrations （mg/L）. Poly-tris（4- aminophenyl）methanol （P-TAPM） has quite high emission and excitation intensity values. Optical and electrochemical band gaps of the polymers were lower than those of the monomers indicating the more conjugated structure of the polymers. The oxidized states of the novel dyestuff compounds were examined by cyclic voltammetry （CV） technique. The solid state conductivity measurements showed that the synthesized polymers were semiconductors when exposed to the iodine vapour their conductivities could be increased. P-TAPM had the highest undoped conductivity. Thermal characterizations of the synthesized compounds were carried out by TG-DTA and DSC methods.

关键词： Dyestuff polymers Thermal properties Fluorescence Oxidative polymerization.

SYNTHESIS AND CHARACTERIZATION OF AN ACRYLATE POLYMER CONTAINING CHLORINE-1,3-DIOXALANE GROUPS IN SIDE CHAINS

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Polymer Science 2012年第5期30卷 642-651页

作者： Zulfiye Ilter Ferhat Alhanli Fatih Dogan ismet kaya Firat University Faculty of Science and ArtsDepartment of ChemistryElazigTurkey Canakkale Onsekiz Mart University Faculty of EducationSecondary Science and Mathematics Education 17100CanakkaleTurkey Canakkale Onsekiz Mart University Department of Chemistry17020CanakkaleTurkey

Poly[2-（4-chlorophenyl）-l,3-dioxolan-4-yl]methyl acrylate, poly（CPhDMA）, was synthesized with radical polymerization process using 2,2＇-azobisisobutyronitrile as radical initiator in 1,4-dioxane at 60℃. The structure of poly（CPhDMA） was confirmed by means of UV-Vis, FT-IR, 1H-NMR, and 13C-NMR spectral techniques. The molecular weight distribution values of the polymer were determined with gel permeation chromatography （GPC）. The number-average molecular weight （Mn）, weight-average molecular weight （Mw） and polydispersity index （PDI） values of poly（CPhDMA） were determined to be 10300, 21600 and 2.097, respectively. The thermal degradation kinetics of the polymer was investigated by using TG/DTG-DTA and DSC analyses at different heating rates in dynamic nitrogen atmosphere. The apparent activation energy values obtained by Flynn-Wall-Ozawa and Friedman methods were found to be 91.68 and 85.23 kJ mo1-1, respectively, for thermal decomposition of poly（CPhDMA）. Also, the thermal degradation activation energy value of poly（CPhDMA） was calculated by using the Kissinger method based on the DTG, DTA and DSC data. Then the mechanism function of it was determined by master plots method. Finally, electrical and optical properties of poly（CPhDMA） were determined by four-point probe and UV-Vis techniques, respectively.

关键词： Synthesis of acrylate polymer Thermal degradation Kinetic parameters.

反气相色谱法测定聚环己基丙烯酸甲酯的热力学性质（英文）

在线全文

学校读者我要写书评

暂无评论

色谱 2014年第7期32卷 746-752页

作者： ismet kaya Cigdem Yigit PALA Canakkale Onsekiz Mart University Faculty of Sciences and ArtsDepartment of ChemistryPolymer Synthesis and Analysis Laboratory Kaleseramik AR-GE Research Kaleseramik R & D CenterKaleseramik Canakkale Kalebodur Ceramic Industries Inc.

In this work,some thermodynamic properties of poly(cyclohexyl methacrylate)were studied by inverse gas chromatography(IGC).For this purpose,the polymeric substance was coated on Chromosorb W and which was filled into a glass *** retention times(tr)of the probes were determined from the interactions of poly(cyclohexyl methacrylate)with n-pentane,n-hexane,n-heptane,n-octane,n-decane,methanol,ethanol,2-propanol,butanol,acetone,ethyl methyl ketone,benzene,toluene and o-xylene by IGC ***,the specific volume(V0g)was determined for each probe *** using(1/T;ln V0g)graphics,the glass transition temperature of poly(cyclohexyl methacrylate)was found to be 373 *** adsorption heat under the glass transition temperature(ΔHa),and partial molar heat of sorption above the glass transition(ΔHS1),partial molar free energy of sorption(ΔGS1)and partial molar entropy of sorption(ΔSS1)belonging to sorption for every probe were *** partial molar heat of mixing at infinite dilution(ΔH∞1),partial molar free energy of mixing at infinite dilution(ΔG∞1),Flory-Huggins interaction parameter(χ∞12)and weight fraction activity coefficient(a1/w1)∞values of polymer-solute systems were calculated at different column *** solubility parameters(δ2)of the polymer were obtained by IGC technique.

关键词：气相色谱负化学源质谱杀虫剂蜂蜜

Long-term success of ahmed glaucoma valve in refractory glaucoma

在线全文

学校读者我要写书评

暂无评论

International Journal of Ophthalmology(English edition) 2012年第1期5卷 108-112页

作者： Mahmut kaya Zeynep Ozbek Aylin Yaman ismet Durak Department of Ophthalmology Dokuz Eylul UniversityIzmirTurkey

AIM:To evaluate the long-term results and complications of ahmed glaucoma valve (AGV) implantation in refractory glaucoma.· METHODS:A retrospective review of 13 patients (13 eyes) with refractory glaucoma who underwent AGV implantation and had a minimum follow-up of 18 months was *** patients underwent a complete ophthalmologic examination and intraocular pressure (IOP) measurement before surgery and at 1 month,3 months,6 months,1 year after surgery and yearly *** and the number of antiglaucoma medications needed were recorded.· RESULTS:Mean age was 27.3±16.0 *** eyes (100%) had at least one prior incisional *** follow-up was 61.3±30.8 *** was reduced from a mean of 35.0±7.0mmHg to 18.2±7.9mmHg at 12 months and to 17.0±4.1mmHg at 96 months (P <0.05) with a lower number of medications from baseline,76.9% patients required additional procedures to achieve the success criteria set by previously published *** most common complications were encapculated cyst formation in eight eyes (61.5%) and tube exposure in four eyes (30.8%).· CONCLUSION:Encapsulated cyst formation was the most common complication which hindered succesful IOP control after AGV implant insertion for refractory *** cyst excision with anti-fibrotic agents,successful IOP reduction was not achieved in 76.9% of the patients without antiglaucoma medication.

关键词： Ahmed glaucoma valve encapsulated cyst intraocular pressure refractory glaucoma