Institute for Color Science and Technology (ICST)Progress in Color, Colorants and Coatings2008-21344220110819Synthesis and Characterization of a Nonionic Urethane-Based Thickener71777578210.30509/pccc.2011.75782ENF.NajafiDepartments of Resin and Additives, Institute for Color Science and TechnologyM.PishvaeiDepartments of Resin and Additives, Institute for Color Science and TechnologyJournal Article20110424Hydrophobically modified ethoxylated urethanes have been synthesized using polyethylene glycol, hexamethylene diisocyanate and cetyl alcohol. These types of thickeners are categorized as nonionic associative thickeners. The HEURs were prepared in two steps. Initially an ethoxylated urethane prepolymer was synthesized through a reaction between a polyethylene glycol (Mn=6000) and hexamethylene diisocyanate using the step growth polymerization technique, then modification was carried out by reaction of cetyl alcohol with the obtained prepolymer. HEURs were characterized using 1H NMR, FTIR and GPC techniques. The rheological properties of incorporated samples in different media proved the considerable thickening efficiency of the produced HEUR.https://pccc.icrc.ac.ir/article_75782_6a267c45cb6b2ef0d5cb7bc4a5cc0aa1.pdfInstitute for Color Science and Technology (ICST)Progress in Color, Colorants and Coatings2008-21344220110801Water Fast of Inkjet Print by Using Acrylic /Nano-Silver Ink79837578310.30509/pccc.2011.75783ENA.Soleimani-GorganiDepartment of Printing Science and Technology, Institute for Color Science and TechnologyM.PishvaeiDepartments of Resin and Additives, Institute for Color Science and TechnologyJournal Article20110424A colour ink jet printing with improved water fastness property was produced by using of special component in the ink’s formulation. In this study, the water fastness of ink jet prints which used acrylic/nano-silver resin nano-composite ink instead of conventional resin in ink’s formulation was examined. The nano composite resin was prepared via miniemulsion polymerization of acrylate monomers in the presence of silver nanoparticles. The water fastness properties of the prints were assessed by using the ASTM /F2292-03 water fastness test. The results indicated that acrylic/nano-silver resin increased impermeability of the printed paper and provided the water insoluble printed image on the paper. Also by adding acrylic/nano-silver resin, the hue of printed image was darker than conventional resin.https://pccc.icrc.ac.ir/article_75783_941a09418fbe8f9c884fa349f530253e.pdfInstitute for Color Science and Technology (ICST)Progress in Color, Colorants and Coatings2008-21344220111106Effect of various fuels on structure and photo-catalytic activity of TiO2 nano-crystalline prepared by microwave-assisted combustion method85947578410.30509/pccc.2011.75784ENF.OshaniDepartment of Inorganic Pigment and Glazes, Institute for Color Science and TechnologyS. M.HashemiYoung Research Club, Islamic Azad University, Shahr-e-Ray BranchJournal Article20110620Nano-crystalline TiO2 were synthesized by combustion method using metal nitrate solution and urea, glycin and citric acid fuels. Microwave irradiation was used as heating source. X-ray diffraction, scanning electron microscope as well as Fourier transform infrared spectroscopy were performed to characterize the obtained samples. X-ray diffraction patterns revealed that in the case of citric acid a calcination step was needed to obtain the desired phases. Moreover, the ratio of rutile/anatase phases varied from 25/75 to 0/100 as the fuel type changes from urea to glycine and citric acid. The crystallite size of the as-synthesized samples calculated by Scherer formula was 8-15 nm. From scanning microscopy images thick and thin flaky particles were detected for citric acid and urea samples and porous spongy morphology for glycine sample. Due to a well-crystallized mixed crystalline structure 75 anatase - 25 rutile, the urea sample seemed to be a better candidate for photo-catalytic functions.https://pccc.icrc.ac.ir/article_75784_79b6268407a7f66789915571e0fcb11e.pdfInstitute for Color Science and Technology (ICST)Progress in Color, Colorants and Coatings2008-21344220111208Representing Spectral data using LabPQR color space in comparison to PCA method951067578110.30509/pccc.2011.75781ENS.Gorji KandiPolymer Engineering and Color Technology Departmen, Amirkabir University of TechnologyJournal Article20110905In many applications of color technology such as spectral color reproduction it is of interest to represent the spectral data with lower dimensions than spectral space’s dimensions. It is more than half of a century that Principal Component Analysis PCA method has been applied to find the number of independent basis vectors of spectral dataset and representing spectral reflectance with lower dimensions. Recently, a new Interim Connection Space ICS named LabPQR was introduced, which contains three colorimetric dimensions and additional black metamer space. In the present study, the performance of PCA method in comparison to LabPQR was investigated for representation of spectral reflectance. For this end, different color datasets including Munsell, Glossy Munsell, GretagMacbethColorChecker, Esser test chart and two printing datasets were evaluated. The results show that, the performance of PCA and LabPQR, depends on the applied dataset. Based on spectral metrics such as RMS and GFC values, PCA has better results than LabPQR. Considering color difference errors, LabPQR is a better space even based on the color difference under second illuminant. Moreover, the used dataset for obtaining PQR vectors affects the representation results. For some datasets, the PQR components of the other sets perform better. However, obtaining PQR bases from the same data source, gives better results. Comparing Cohen and Kappauf based and unconstrained LabPQR methods showed that Cohen and Kappauf-based performs better for all the datasets.https://pccc.icrc.ac.ir/article_75781_13d43b2117b49b40dc10b3006243da7e.pdfInstitute for Color Science and Technology (ICST)Progress in Color, Colorants and Coatings2008-21344220111201A Kinetic study on the dissolution of two naphthalimide based synthesized disperse dyestuffs in the presence of dispersing agents1071127578510.30509/pccc.2011.75785ENA.KhosraviDepartment of Polymer Engineering and Color Technology , Amirkabir University of TechnologyK.GharanjigCenter of Excellence for Color Science and Technology,Department of Organic Colorants, Institute for Color Science and TechnologyS.MoradianFaculty of Polymer and Color Engineering,Amirkabir University of Technology, Center of Excellence for Color Science and Technology,Institute for Color Science and TechnologyM.HosseinnezhadCenter of Excellence for Color Science and Technology,Department of Organic Colorants, Institute for Color Science and TechnologyJournal Article20110124The controlling kinetics of the water solubility of two synthesized mono azo naphthalimide based disperse dyestuffs in the presence of two different dispersing agents namely Irgasol DAM and lyoprint EV agents at various temperatures were investigated. An exponential rate equation was found to describe the dissolution process. The addition of Irgasol DAM and Lyoprint EV dispersing agents increased the rate of the dissolution of both synthesized dyestuffs. The dissolution of the methyl naphthalimide derived dyestuff in water as expected was more than the propylnaphthalimide derivative. The depth of dyeing and the leveling properties were also higher for the methyl derivative than the propyl derivative.https://pccc.icrc.ac.ir/article_75785_bea2573b98e47a52a41f842dde97d064.pdfInstitute for Color Science and Technology (ICST)Progress in Color, Colorants and Coatings2008-21344220111212Design and synthesis of new symmetrical Schiff bases1131207578710.30509/pccc.2011.75787ENN.MahmoodiDepartment of Chemistry, University of GuilanN.NaseriDepartment of Chemistry, University of GuilanE.AsadollahiDepartment of Chemistry, University of GuilanB.Ghalami ChoobarDepartment of Chemistry, University of GuilanR.H. SajediDepartment of Biology, University of GuilanJournal Article20110124A series of symmetric multidentate Schiff base ligands 1–13 based on the N‚N′-4‚4′-ethylenebiphenylbis-3-methoxysalicylideneimine for used to bind various transition metals detection of K, AgI‚ CuII, Sr II Co II and NiII at trace levels in real-world samples has been synthesized purified and their structures was characterized.https://pccc.icrc.ac.ir/article_75787_99b4f050796af8d53f24a7ada08891bc.pdfInstitute for Color Science and Technology (ICST)Progress in Color, Colorants and Coatings2008-21344220111212Aggregation of an anionic azo dye with conventional cationic surfactants in premicellar region: A conductometric study1211287578610.30509/pccc.2011.75786ENS.Javadian FarzanehDepartment of Physical Chemistry, Tarbiat Modares UniversityF.HooshmandDepartment of Physical Chemistry, Payame Noor University, Urmiah BranchA.Asadzadeh ShahirDepartment of Physical Chemistry, Tarbiat Modares UniversityJournal Article20110829The interaction of Congo Red CR with a series of Alkyltrimethylamoniumbromide CnTAB, N-hexadecylpyridinium bromide CPB and N-hexadecylpyridinium CPC were investigated using conductometry technique. It was observed that the formation of dye-surfactant ion pairs takes place at surfactant concentration far below the critical micelle concentration of the individual surfactants. Aggregation was reflected by the appearance of a break point at conductometry plots. The equilibrium constant and other thermodynamic parameters for the ion pair formation were calculated on the basis of a theoretical model using the data obtained by conductometry. The reaction between dye and surfactants was revealed to be an enthalpy-driven reaction which is highly dependent on temperature and the structures of both dye and surfactant.https://pccc.icrc.ac.ir/article_75786_a57bfd698091ab7076d1da5517ee53dc.pdf