grafting and surface properties of hyperbranched polymers

... study of polymers III Technique of mechanical tests of vulcanizates of rubber and plastics Rubber Chem Tech., 13, 904–917 Haward, R.N (1942) Extension and rupture of cellulose acetate and celluloid ... in the range of temperatures and strain rates of interest A linear dependence of yield stress as a function of log strain rate can be observed over a large interval of strain rates and temperatures, ... response to a constant rate of deformation, while the blue line is the response to a constant stress Mechanical properties of solid polymers Constitutive modelling of long and short term behaviour...

Ngày tải lên: 09/03/2014, 00:20

... The density of isosurfaces is 1.5 Â 10À3 e/Å3 The wave functions of p- and p*-like bands on Si(1 1)-(2 Â 1) surfaces are also shown on the inset of (a) and (b), respectively p*-like bands on {1 ... Si(1 1) surfaces, the validity of surface separation has been checked by using slab geometry with 7–12 Å thick vacuum region We found that the surface energy and positions of surface atoms of Si(1 ... in terms of the projection of energy band in bulk Si and confinement effect: the confinement decreases the energy of HO states and increases the energy of the LU states, but the magnitude of the...

Ngày tải lên: 16/03/2014, 15:37

... of the structural and functional properties of the native proteins and thus may offer a useful basis for the design of agents for therapeutic intervention [7] Studies of different fragments and ... Therefore, the objectives of this study were to analyze (a) the effect of KL4 on the physical properties of membranes, in the absence and presence of Ca2+, using fluorescence anisotropy of 1,6-diphenyl-1,3,5-hexatriene ... ordering effect of SP-B and related peptides on the polar surface of DPPC ⁄ PG vesicles [23,24] Thermotropic properties of KL4-containing membranes Next, we used the nonperturbing technique of DSC to...

Ngày tải lên: 30/03/2014, 11:20

... inside wall and 3D structures of the inner wall were obtained using MeX software Figures and 10 show an FIB-milled pipette and stereo images Table shows inner surface properties of small b m ... and average surface roughness (Sa) of all pipettes have been measured Figures 3, 4, 5, and show correlations between pulling parameters and Dt and Sa As it can be seen from Figures 3, 4, 5, and ... significantly decreases Dt and Sa The effects of pull and heat are very similar and not as significant as the effect of velocity Delay and pressure are factors to change the taper length of the pipettes...

Ngày tải lên: 21/06/2014, 03:20

... substrate surface Based on both these curves, coercive fields (Hc) of 355.8 and 93.6 Oe, respectively, for NCs and PSC, saturation magnetizations (Ms) of 125.7 and 162.5 emu/g, respectively, for NCs and ... http://www.nanoscalereslett.com/content/6/1/285 Page of published SY and YQ: partly carried out the TEM and HRTEM experiments, as well as drafted the manuscript XL, LS, and HL: conceived of the study, and participated in its design and coordination ... out the experimental and numerical calculations, as well as drafted the manuscript VSM and PPMS: performed an analysis and interpretation of results, and gave final approval of the version to be...

Ngày tải lên: 21/06/2014, 04:20

... study smooth surface for specimen requirement and allowable thermal drift for environmental control, following that convergent curves of hardness and modulus are obtained Ra and RMS of ZnO thin ... film-only properties In addition, a plot of Young’s modulus of ZnO thin films on three various substrates determined using the method of Oliver and Pharr [18] is illustrated in Fig 2(c) The variation of ... pulsed-laser deposition (PLD) system and, to investigate the surface morphological and mechanical behaviors of ZnO thin films by using atomic force microscopy (AFM) and nanoindentation/nanoscratch...

Ngày tải lên: 22/06/2014, 01:20

... MWCNT in case of former and with wt% in case of the latter Electrical Properties Fig SEM images of a raw, b acid modified-MWCNTs and c amide-MWCNTs As in the case of TS, the YM of the amide-MWCNTs/ ... Electron Microscopy The surface morphology of the as-produced, functionalized MWCNTs and the fractured surface of the nanocomposites 123 Figure shows the FTIR spectra of acid and amino functionalized ... duration and prolonged use between 200 and 350 °C without much deterioration in mechanical and other properties Polyimides are produced by the condensation reaction of an aromatic dianhydride and...

Ngày tải lên: 22/06/2014, 01:20

... thermal properties of green polymers such as natural polymers and polymers derived from saccharides and lignins The above green polymers include polymers such as poly(ε-caprolactone) (PCL) and polyurethane ... Overview of Green Polymers Molecular Level Morphology of Important Green Polymers: Cellulose and Lignin 3 Raw Materials for Synthetic Green Polymers: Molasses and Lignin Scope of ... lignin and green polymers by thermal and mechanical analyses, spectroscopy, and x-ray diffractometry Synthesis of green polymers derived from saccharides and lignins, such as polyurethane and polycaprolactone...

Ngày tải lên: 27/06/2014, 15:20

... Overview of Green Polymers Molecular Level Morphology of Important Green Polymers: Cellulose and Lignin 3 Raw Materials for Synthetic Green Polymers: Molasses and Lignin Scope of ... Topics in Thermal Analysis and Calorimetry Volume Series Editor: Judit Simon, Budapest University of Technology and Economics, Hungary Thermal Properties of Green Polymers and Biocomposites by Tatsuko ... the properties, especially thermal properties, of green polymers and to extend their practical applications Hence, the first half of this book is devoted to our results on fundamental research and...

Ngày tải lên: 11/08/2014, 06:20

... the number of the specimens should be more than three and significant figures of size and those of mass should be coordinated Density Characterization of Green Polymers 27 Density of the sample ... measurements of green polymers Dynamic modulus, dynamic loss modulus and tan δ as function of temperature and frequency Temperature of the main chain relaxation (glass transition) Temperature of local ... Repeatability and accuracy of DSC data of polymers are found elsewhere [43-45] Figure 2-5 Schematic conformation of heat-flux type DSC By DSC, the following information on green polymers and related...

Ngày tải lên: 11/08/2014, 06:20

... structure of natural cellulose and the structure of water vary as a Thermal Properties of Cellulose and Its Derivatives 65 function of Wc, Cp water and Cp cellulose changes as a function of Wc Accordingly, ... hydrophylicity of polymers In the case of cellulose, the numbers of hydroxyl group in the amorphous region, defects of crystallite and the surface of crystallite affect the Wnf When Wc in the polymers ... Figure 2-20) of the OH band at 3360 cm-1 and OD band at 2530 cm-1 were calculated using the band of 2900 cm-1 (CH and CH2 stretching) as an internal standard Using an internal standard, differences...

Ngày tải lên: 11/08/2014, 06:20

... representative curves of relative baseline optical density of OH stretching band of various types of lignin as a function of temperature The relative optical density of OH stretching band starts to decrease ... density of representative OH stretching band (hydrogen bonded) and temperature of various kinds of lignin I: KL (3400 cm-1, 3500 cm-1), LS (3380 cm-1, 3500 cm-1), DL (3380 cm-1, 3500 cm-1) and MWL ... structures of lignin p-hydroxyphenyl (I), guaiacyl (II), and syringyl (III) structures Lignin is a major component of plants Scanning electron and ultraviolet micrographs of the cross section of cedar...

Ngày tải lên: 11/08/2014, 06:20

... observed between Tg and Tm of KLPCL and those of ALPCL 100 H /Jg -1 80 60 40 20 -20 10 20 30 -1 CL/OH Ratio / mol mol Figure 6-39 Change of ∆H's of Tcc and Tm with CL/OH ratio in AL- and KLPCL KLPCL, ... corresponds to the molecular motion of amorphous chains of CAPCL When the crystalline region is formed, it restricts the incoherent movement of random chains and the number of molecular chains involving ... to detect the main chain motion of CA when CL/OH ratio exceeds Variation of Tg, temperature of β-dispersion of PCL and ∆Cp indicates that the molecular chain of CAPCL becomes mobile with increasing...

Ngày tải lên: 11/08/2014, 06:20

... number of moles of isocyanate groups per gram of MDI, WMDI the weight of MDI, MLig the number of moles of hydroxyl groups per gram of lignin, WLig the weight of lignin, MPEG the number of moles of ... KLTPU and KLPPU Figures 7-44 (B) and 7-44 (C) show the change of σ10, σy and E with KL contents of KLDPU, KLTPU and KLPPU The values of σ10, σy and E of KLDPU, KLTPU and KLPPU decrease with increasing ... values of σ10/ ρ, σy/ ρ and E/ ρ decrease with increasing KL content Figures.7-46 and 7-47 show the change of σ10, σy and E values of KLDPU, KLTPU and KLPPU with ρ values The values of σ10, σy and...

Ngày tải lên: 11/08/2014, 06:20

... amount of water was excluded from the sand using a corking hand gun In this stage, the mass of sand increases ca 16 %, (4) the surface of the sand is flattened, (5) a pre-determined amount of PEG ... are formed on the surface of the sand and the mass of PU is negligible for ρ of composites When compression strength (σ) of KLPPU, LSPPU and MLPPU is plotted against content of lignin or molasses ... change of permeation distance of LSTPU and LSPPU with LS contents in TEG and PEG solutions Figure 8-18 shows change of permeation distance of geocomposites with KL, LS and ML contents in PEG and...

Ngày tải lên: 11/08/2014, 06:20

... measurements, and Raman/photoluminescence (PL) measurements, together with various state -of- the-art surface analysis techniques We aim to investigate unique electronic and optical properties of surface- modified ... with etched holes of 1.0 and 1.5 µm in diameter (b) PL spectra of monolayer and few-layer MoSe2 (c) PL spectra of monolayer and few-layer WSe2 (d) PL intensities for 1L, 2L, 3L, and bulk WS2 using ... electron cut-off) and (b) and (c) low binding energy region (near the Ef) during the deposition of Cs2CO3 on bulk MoS2 The XPS core level spectra of (d) S 2p and (e) Mo 3d during the deposition of Cs2CO3...

Ngày tải lên: 09/09/2015, 11:16

... principles and actual devices Electronic and Optoelectronic Properties of Semiconductor Structures provides engineering and physics students and practitioners with complete and coherent coverage of key ... manual and set of viewgraphs for use in lectures is available for instructors   received his Ph.D from the University of Chicago and is Professor of Electrical Engineering and Computer ... University of Michigan, Ann Arbor He has held visiting positions at the University of California, Santa Barbara and the University of Tokyo He is the author of over 250 technical papers and of seven...

Ngày tải lên: 24/01/2014, 17:34

... the compensation of ion Fe3+ in the tetrahedral and octahedral location That led to increasing of total magnetization of a molecule Ni1-xCoxFe2O4 and hence there is increasing of MS (table 3) ... high coercivity of materials, the second term can take part of several tens percent of HC and the last one whereas can only reach several hundreds of gauss Thus, the increasing of Co-concentration ... Co-concentration led to the increasing of anisotropy property of ferrites Ni1-xCoxFe2O4, hence it was the increasing of HC The increasing of HC proved that the soft magnetic property of ferrite NiFe2O4 changed...

Ngày tải lên: 13/02/2014, 04:20

... mRNA and also of its own transcript For this reason, the level of mRNA for the wildtype form of MCPIP and the level of mRNA for IL-1b (Fig 5A, lane 3) were lower in comparison to the level of mRNA ... clarify the dynamics and features of this protein Role of MCPIP in regulation of the endogenous IL-1b transcript level After identification of a PIN domain in the MCPIP by use of bioinformatics, ... lanes 2,3 and 4, lower band) The levels of mutant and wild-type MCPIP mRNAs were higher when these vectors were co-transfected with a vector overexpressing IL-1b (Fig 5, lanes and 4, upper bands)...

Ngày tải lên: 18/02/2014, 14:20

... Araujo Soares RM (2006) Secretion of serine peptidase by a clinical strain of Candida albicans: influence of growth conditions and cleavage of human serum proteins and extracellular matrix components ... antibacterial ⁄ fungicidal properties of trappin-2 involve the cationic nature of the molecule, as assessed from the salt and heparin dependence of the antimicrobial and antifungal effects Results ... fungicidal effect of a lm concentration of trappin-2 towards C albicans was time-dependent, reaching 92% after h and 98% after 18 h (Fig 5) Effect of NaCl and heparin on the antibacterial and antifungal...

Ngày tải lên: 18/02/2014, 17:20