textural characterization of extruded materials and influence of common additives

... photomicrographs of fresh and modified fly ash (A and B) SEM of fresh fly ash at 1,000 and 2,500 times magnification, (C and D) SEM of ball milled fly ash for 20 h at 1,000 and 3,000 times magnification, (E and ... F) SEM of ball milled fly ash for 40 h at 1,000 and 3,000 times magnification, (G and H) SEM of ball milled fly ash for 60 h at 1,000 and 3,000 times magnification Fig 10 (A and B) TEM images of fly ... F) cl þ cl ð2Þ Subscripts s and l represent solid and liquid states respectively and h represents the contact angle of the liquid and the material surface The work of adhesion could also be obtained...

Ngày tải lên: 22/06/2014, 18:20

... temperature range of 550oC to 850oC The BiTaO4 exhibited high εr, low tan δ and near zero TCC with value of 47–48, 0.0122 and 0.00022, respectively Synthesis and Characterization of BiTaO4 62 REFERENCES ... satisfies the trend of miniaturization and high functionality of modern electronic devices as green ceramic tapes of different materials serving different passive functions are laminated and co-fired ... spectroscopic plots of the imaginary components of the impedance (Z'') and electric modulus (M''), as shown in Figure The frequency maxima of Z'' and M'' should be coincident, and the full width...

Ngày tải lên: 07/08/2014, 14:20

... deprotection and lithiation of the 4-(propylcarboxalato)phenoxy side groups, and the characterization of the polymers are discussed to illustrate the dependence of ion transport and hydrophobic ... Professor of Chemistry Head of the Department of Chemistry *Signatures are on file in the Graduate School iii ABSTRACT The work described in this thesis focuses on the design, synthesis, and characterization ... Chapters and details work towards the synthesis and evaluation of highly selective membranes for use in lithium-seawater batteries The fifth chapter deals with the synthesis and characterization of...

Ngày tải lên: 13/11/2014, 11:13

... reported bandgap of amorphous silicon (~1.7 eV) against that of crystalline silicon (1.1 eV), it follows that there is a larger band offset (~0.45 eV) at the valence band edges and a smaller band offset ... properties of the c-Si wafer and of the a-Si and µc-Si thin-film layers, based on [127] as well as on the fitting of the lifetime samples of Figure 4.4 The activation energy (i.e position of the ... low conduction band offset, and a sufficiently high valence band offset so as to have an efficient collection of photogenerated electrons while minimizing the back diffusion of holes into the...

Ngày tải lên: 09/09/2015, 11:15

... encouragements and understanding during past years VI Summary This thesis research dealt with the synthesis and characterization of cobalt ferrite (CoFe2O4) powdered materials, and studied the influences of ... effects of chemical composition and site occupation of magnetic ions will be essential for understanding the coercivity mechanisms of cobalt ferrite materials Thus the discussion of phase and cation ... powders, and their influences on the magnetocrystalline anisotropy and magnetic properties of CoFe2O4 powdered materials; (Chapter 3) (iii) To explore the feasibility of the introduction of high-level...

Ngày tải lên: 11/09/2015, 09:10

... Institute of Materials Research and Engineering (IMRE) for their help in preparing samples and conducting experiments Thanks also go to Department of Materials Science and Engineering of NUS for ... depths of PC and PMMA films at different indentation depths 135 (a) Fitting curves of the PMMA film at depths of 10 μm , 20 μm and 30 μm (b) Fitting curves of the PC film at depths of 10 μm and ... Department of Materials Science and Engineering of NUS, and my co-supervisor, Dr Wang Yuyong, from the Institute of High Performance Computing (IHPC), for their guidance, support and encouragement...

Ngày tải lên: 12/09/2015, 09:59

... parents for their supports and understanding over the years I TABLE OF CONTENTS Page ACKNOWLEDGEMENTS TABLE OF CONTENTS ABSTRACT LIST OF TABLES LIST OF FIGURES LIST OF SYMBOLS CHAPTER Introduction ... Units and Europium Complex 62 3.1 Introduction 62 3.2 Experiment 63 3.2.1 Preparation and Characterization of the PKEu Copolymer 63 3.2.2 Device Fabrication and Characterization 64 3.3 Results and ... technologies include dynamic random-access memory (DRAM), static random-access memory (SRAM), and flash memory (NAND and NOR) DRAM is a random access memory that stores each bit of data in a separate...

Ngày tải lên: 12/09/2015, 11:29

... Details of the amphiphilic poly(p-phenylene)s synthesized and used for the present study 6.3.1 Synthesis and characterization of monomers and polymers The polymers C6PPPOH, C12PPPOH and C18PPPOH ... bromination of hydroquinone was achieved using a standard procedure.3 In the case of C12PPPC11OH, monoalkylation of was done using 1.0 equiv of dibromohydroquinone and 0.9 equiv of alkyl bromide ... monalkylated hydroquinone and 1.5 equivalents of 11-bromo undecanol in presence of a weak base, potassium carbonate The crude product was reprecipitated from a mixture of 1:4 chloroform and methanol The...

Ngày tải lên: 14/09/2015, 18:36

... employed to control the size, shape and function of inorganic materials with controlled dimensions The adoption and manipulation of the synthesis of inorganic materials using artificial or natural ... equivalent of monalkylated hydroquinone and 1.5 equivalents of 11-bromo undecanol in presence of a weak base potassium carbonate The crude product was reprecipitated from a mixture of 1:4 chloroform and ... 5.1 Chemical structures of the PPPs used for silica polymerization 5.2 Results and Discussions 5.2.1 Synthesis of Polymer C12PPPOC11OH The synthesis and characterization of the monomer dibromohydroquinone,...

Ngày tải lên: 14/09/2015, 18:37

... Synthesis and Characterization of the polymer C6PPPC5Cb The polymer C6PPPOH was synthesized using Suzuki polycondensation of the respective monomers and the details of the polymer synthesis and characterization ... 4.3 Absorbance and emission spectrum of the polymers C6PPPOH and C6PPPCb in chloroform solution 4.2.2 LB film deposition and characterization In order to study the film deposition of the newly ... 10 15 20 25 Number of layers Figure 4.5 Absorption spectra of LB films of C6PPPC5Cb with different number of layers (A) and the dependence of the film absorption on the number of transferred layers...

Ngày tải lên: 14/09/2015, 18:37

... potential of C6PPPOH was higher than that of C12PPPOH and C18PPPOH The band gap of the polymer was calculated and C12PPPOH has low band gap of 2.59 eV as compared to the C6PPPOH and C18PPPOH (3.1 eV and ... (nm) Figure 3.4 Absorption and emission spectra of polymers C6PPPOH, C12PPPOH, and C18PPPOH in toluene (a) and in film (b) 98 Photophysical Properties of a New Class of Amphiphilic poly(p-phenylene)s ... planarization of the polymer backbone Similar results were observed in the case of the emission maxima (λemi) of C6PPPOH, C12PPPOH and C18PPPOH in solution (412 nm, 414 nm, and 407 nm) and in thin...

Ngày tải lên: 14/09/2015, 18:37

... structure of CnPPPOH polymers 2.2 Results and discussion 2.2.1 Synthesis and characterization of the polymer C6PPPOH, C12PPPOH and C18PPPOH A series of amphiphilic PPPs, C6PPPOH, C12PPPOH and C18PPPOH, ... multilayers of C6PPPOH (A) and C12PPPOH (B) and plot of the shift of the resonance minimum for LBK films from C6PPPOH (C) and C12PPPOH (D) obtained from the SPR angular scans 83 LS and LB Film ... the synthesis and characterization of a new class of rigid planar amphiphilic poly(p-phenylene) (CnPPPOH) were reported from our group.17 Due to incorporation of alkoxy chains and hydroxyl (-OH)...

Ngày tải lên: 14/09/2015, 18:38

... π-band (valence band) of the polymer and the lowest unoccupied molecular orbitals (LUMO) form the π*-band (conduction band) of the polymer As a consequence of the band alternation, band gap of ... 60 and 90% (solution) and 40% (solid state) making this materials an attractive candidate for further investigation as active component in LEDs 42,43 Detailed studies of LED fabrication and characterization ... semiconductor sandwiched between an anode and cathode due to the recombination of holes from the anode and electrons from cathode This process of radiative recombination of electrons and holes to...

Ngày tải lên: 14/09/2015, 18:38

... advance in nanomaterials is made possible due to the development of theoretical and experimental tools and techniques, which increases our understanding of matter in both the micro and the nano ... important electronic and optical properties of semiconductors and metal and with the attractive mechanical properties and processing advantages of organic polymers The most common conductive polymers ... polymerization); and (ⅲ) the macroscopic precipitation of the polymer is prevented by the presence of a suitable stabilizer The principles of steric stabilization and the use of various types and architectures...

Ngày tải lên: 15/09/2015, 17:10

... PROPERTIES AND MACROSCOPIC CHARACTERIZATION OF COMPOSITE MATERIALS QIU CHENGWEI B ENG., UNIVERSITY OF SCIENCE AND TECHNOLOGY OF CHINA, 2003 A DISSERTATION SUBMITTED FOR THE JOINT DEGREE OF DOCTOR OF ... intensity of the plasmonic rod of k0 a = 0.1 and r = −1 in the cases of first two terms 40 2.17 The energy intensity of the plasmonic rod of k0 a = 0.1 and r = −1 in the case of ... slab of medium with r = µr = 10−5 and κ = 0.25: (a) Magnitude of real parts and transmitted power; and (b) Magnitude of imaginary parts 150 LIST OF FIGURES xix 4.20 Electric field as a function of...

Ngày tải lên: 30/09/2015, 06:38

... subject of the thesis: “Study on synthesis and characterization of new materials based nanostructures of graphene applied in environmental treatment” Objectives of the thesis Synthesis and characterization ... temperature and stir speed - Synthesi of Fe-Fe3O4-GOVS - Characterization of Fe3O4-GOVS and Fe-Fe3O4-GOVS by using XRD, XPS, FTIR, HR-TEM, etc - Studying adsorption isotherm, adsorption kinetic of dye and ... other hand, the Figure 3.32 The effect of pH on the higher pH is, the lower adsorption of GO and rGO for RR195 adsorption capacity of GOVS and GOSA are The pH = 5.5 is chosen because of the real...

Ngày tải lên: 28/04/2016, 17:48

... identity of 98% at the nt level among each isolate with 4561 bp recovered in this study and to prototypes of B19 HV (F162273) and B19 Int J Med Sci 2007, 107 Au (M13178), and an identity of 87% ... AB126270 for B19-AN85 and AB126271 for B19-AN87 Discussion The etiology of hepatitis remains obscure in 3-10% of cases in Europe [5] and the United States [6] and up to 30% of cases in Asia [7, ... 1996) The sensitivity of this PCR assay allowed detection of as few as 10 copies of B19 genome In addition, we sequenced the B19 isolates consisted of 4561 bp covering NS1, VP1 and VP2 regions obtained...

Ngày tải lên: 26/10/2012, 10:03

... relationship of age, gender, handedness, and sidedness to the size of the corpus callosum Academic Radiology 1994; 1:243-248 69 Driesen NR, Raz N The influence of sex, age, and handedness on ... levels of active latency were associated with concentration ability, and passive latency with verbal proficiency and recall [72] The decreases in P3 and novelty P3 with increasing age, and indeed ... descriptive and limited in power and generalizability Still lacking are large-scale, blinded, randomized, prospective studies of ERP-guided therapy; however with decreasing costs of signal acquisition and...

Ngày tải lên: 02/11/2012, 11:08

... polysaccharide One milligram of the partially purified polymer contained 309.7 µg of protein, 160.2 µg of neutral sugar, 58.5 µg of hexosamine, 30.8 µg of uronic acid and 3.8 µg of phosphorus Constituent ... concentration of ppm to estimate the effect of pH After min, A660 was measured and the extent of flocculation was calculated Pronase digestion of extracellular polymer Forty milligrams of the extracellular ... as follows: 500 g of soil was washed times with distilled water and suspended in 1,000 ml of water The mixture was allowed to stand for 10min and the supernatant was collected and used for the...

Ngày tải lên: 05/09/2013, 09:08

... and rural areas Ministry of Agriculture, Forestry and Fisheries Tokyo (published every year) Ministry of Environment of Japan (2008) Annual report on the environment Ministry of Environment of ... not available for the number of hens, these data are not listed in this table The population of H1 and H2 watersheds decreased by 10.3% and - 294 - Journal of Water and Environment Technology, ... respectively, between 1990 and 2005 In this period, the number of factories and animals also decreased In 2000, the population densities of H1 and H2 watersheds were calculated to be 46 and 78 inhabitants...

Ngày tải lên: 05/09/2013, 10:15