mechanical dynamic mechanical and thermal properties of elastomers

... lattices at different loadings Finally, influence of these chemically crosslinked gels on mechanical, dynamic mechanical, and thermal behavior of virgin elastomers was studied in detail along with ... for elongation at break values Dynamic mechanical properties of gels, as well as gel filled rubbers were measured as a function of temperature using the Dynamic Mechanical Analyzer DMA Q800 (TA ... very similar to that of TS However, SBR gels have comparatively higher values of Ey than the NR gels The dynamic mechanical properties of different gels as compared to that of neat rubber strongly...

Ngày tải lên: 22/06/2014, 01:20

... only wt% of 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 ... because of their large aspect ratio and mobile p electrons Addition of very small quantities of MWCNTs significantly increases the conductivity of the composite as observed in Fig As in the case of mechanical ... Structure of PMDA/ ODA-based polyamic acid 123 446 Amine Modification of Acid Modified A 100 mL-flask was charged with g of MWCNTs-COOH dispersed in 30 mL of anhydrous benzene (C6H6) to which 30 mL of...

Ngày tải lên: 22/06/2014, 01:20

... TABLES OF MECHANICAL PROPERTIES OF SINGLE SOLDER JOINT SPECIMENS 323 APPENDIX B FORMULATION OF DYNAMIC TESTING METHODOLOGY AND THE MINIATURE IMPACT TESTER 334 APPENDIX C DEFINITION OF ... investigation of the quasi-static and dynamic mechanical properties of single solder joint specimens based on new generation of lead-free solder 1.1 Advanced IC packages and issues of reliability ... 5-2 Summary of effect of mesh size and number of element layers on simulation results (3D solid model, orthotropic material properties) 236 Table 5-3 Summary of effect of mesh size...

Ngày tải lên: 11/09/2015, 09:58

... to study the effect of uniaxial tensile stress along the c axis on the mechanical and piezoelectric properties of short-period BTO/PTO superlattice We show the mechanical properties by calculating ... coefficient d33 of ground state superlattice is 86.36 pC/N, which is slightly less than the value of 103.18 pC/N of PTO, but much larger than the value of 36.43 pC/N of BTO Under the loading of uniaxial ... reflect the slope of polarization versus stress curves The enhancement of piezoelectricity corresponds to the maximum slope of the curve of Fig 4a at rc, it is the change of magnitude of polarization...

Ngày tải lên: 22/06/2014, 00:20

... aluminium 2.3 Factors influencing mechanical properties of solid foam The mechanical properties of solid foams are influenced by several factors – the mechanical properties of the solid material defining ... and walls (membranes), cell structure and properties of fluid inside the cells • Mechanical properties of the solid material – The mechanical properties of solid foams, such as stiffness, strength ... second moment of area of the strut cross-section L length of strut in the tetrakaidecahedron cell xx ˆ L length of strut in the rhombic dodecahedron cell Pf mechanical property of foam Ps mechanical...

Ngày tải lên: 14/09/2015, 12:24

... special thermal treatments and/or on the development of new materials for the improvement of GMI properties [58, 59, 60] 21 Introduction Figure 1.12: (a)The definition of the impedance of a current ... figure -of- merit PF Power factor xxiii Introduction Chapter Introduction Transition metal oxides form an amazing class of materials with a wide range of properties They exhibit a variety of phenomena ... between the sets of energy states is called the crystal field energy which is of the order of eV [1] The ratio of dopant atoms Introduction at the site determines the valency of the Mn (Mn3+/Mn4+)...

Ngày tải lên: 10/09/2015, 09:11

... Inset: schematic illustration of how the density -of- states varies from low to high temperatures showing a soft pinning of the DOS tail despite thermal broadening of the centre states 105 xv Chapter ... 63 Figure 3.5 d-spacings of (100), (200) and (010) as a function of temperature (010) spacing of rrP3HT of 3.76Å is also shown 64 Figure 3.6 Dependence of crystallinity on temperature ... (a) Volume fraction of polymer (Φ) as a function of no showing fraction of chains in the random conformation(ξ) of 0.5, 0.7 and 0.9 ξ is obtained from quantitative modeling of each UV-vis solution-state...

Ngày tải lên: 11/09/2015, 09:57

... effect of CTBN content on the glass transition temperatures (Tg) of the EP Properties of Modified Epoxy Resin 3.3 Tensile Properties Table shows the effect of CTBN content on the tensile properties ... testing speeds on the KIC of the EPs Properties of Modified Epoxy Resin In order to correlate the mechanical properties of the modified EP with morphology, the fracture surface of the unmodified and ... modulus of modified EPs A similar trend was found in the case of the tensile properties; the flexural strength and modulus of modified EPs are lower than those of the unmodified EP The decrease of...

Ngày tải lên: 07/08/2014, 14:20

... might depend on the route of administration The aim of the present study was to investigate the effects of IV furosemide on the transportability and rheological properties of mucus in patients under ... of the Pulmonary Division, Hospital das Clínicas, University of São Paulo The study was approved by the Ethics Committee of the University of São Paulo All patients were clinically and haemodynamically ... 0.5 s under a pressure of 280 kPa Clearance was quantified by determining the displacement of mucus in millimetres [13,16] Rheological properties The rheological properties of mucus samples were...

Ngày tải lên: 12/08/2014, 18:21

... 3.9 Mechanical properties of FC and FCA 101 Table 3.10 Mechanical properties of LWAC 102 Table 3.11 Effect of fiber on toughness performance of LWAC and FC 103 Table 3.12 Estimated modulus of ... Details of the testing procedures and results of various mechanical properties are presented The effect of w/c ratio on air-void system of foamed concrete and their effect on mechanical properties ... 4.12 Effect of L9 aggregate volume of draying shrinkage of LWAC 165 Fig 4.13 Effect of aggregate volume on shrinkage (Sc/Sm) ratio of concrete at 90 days of drying 166 Fig 4.14 Effect of aggregate...

Ngày tải lên: 11/09/2015, 09:07

... consisted of the measurement of thermal conductance of two different typologies of building wall: a wall in blocks of calcarenite sandstone assembled with mortar, typical of the constructions of "Sassi ... characteristics of the "Sassi of Matera" and "Trulli of Alberobello" In the South of Italy, the sites of the "Sassi of Matera" (Figure 1a) (classified as humanity world heritage in 1993) and "Trulli of Alberobello" ... black-box methods, the thermal conductance of the wall With this particular type of construction of the monitored walls, it is not possible to use other methods of determination of thermal conductance...

Ngày tải lên: 05/09/2013, 14:58

... agglomerated clusters consisting of high density of nanowires The magnified view of a single cluster is depicted in the inset of Fig 2(d) These observations suggest that growth of nanowires in the present ... respectively, where high density of 1-D nanostructures in the form of wires having hundreds of micrometers length is clearly seen Fig 2(a) also reveals that several layers of nanowires were deposited ... case of amorphous nanowires whereas the latter is based on the three-step mechanism involving (i) diffusion of Si/SiOx vapors into the metal particles, (ii) formation of liquid droplet of metal...

Ngày tải lên: 16/03/2014, 15:18

... characterization of the mechanical properties of the steel In addition, thermal properties were estimated as a function of temperature in order to provide input to models of the steel thermal response ... respectively, of WTC and the positions of these slabs changed over time This suggests a progression of failure of certain parts of the flooring in this area of the tower At the moment of collapse of WTC ... some sort of coating has preserved the fireproofing in place 54 Figure 6–11 Missing fireproofing on flanges of exterior columns of north face of WTC Fireproofing has come off, revealing...

Ngày tải lên: 01/04/2014, 00:20

... sonication time/energy, the thermal conductivity of the nanofluids increases nonlinearly, with the maximum enhancement of 23% at sonication time of 1,355 However, the viscosity of nanofluids increases ... enhancement for the nanofluid with a concentration of 1.0% Das et al [6] explored temperature effects on the thermal conductivity enhancement of nanofluids and found that dispersion of nanoparticles ... Al2O3-water nanofluids with concentrations of up to vol% Wang et al [13] measured the viscosity of the same kind of nanofluids with different dispersion techniques, and stated that the nanofluid could...

Ngày tải lên: 21/06/2014, 17:20

... CHARACTERIZATION OF GREEN POLYMERS Thermal Analysis 13 Other Characterization Methods 25 Chapter THERMAL PROPERTIES OF CELLULOSE AND ITS DERIVATIVES Introduction 39 Thermal Properties ... high profile research subjects in academic and industrial fields The authors of this book have continuously made efforts to investigate the properties, especially thermal properties, of green ... 1991, Mechanical properties of solvolysis lignin-derived polyurethanes Polymer for advanced technology, 2, 41-47 Nakamura, K., Hatakeyama, T and Hatakeyama, H., 1992, Thermal properties of solvolysis...

Ngày tải lên: 27/06/2014, 15:20

... addition of fillers could increase the thermal stability and thermal conductivity of epoxy Besides, the incorporation of fillers could reduce the shrinkage, cost, and coefficient of thermal expansion.1 ... diffusants on the dynamic mechanical thermal properties and light transmittance of epoxy, the following conclusions can be drawn: The CTE of the DCN/SS composites are lower than the CTE of unfilled ... PyrisTM software For the oven-cured sample, a single scanning method was used The sample was heated from 30°C to 250°C at a heating rate of 10°C/min 2.4.3 Dynamic mechanical analysis Dynamic mechanical...

Ngày tải lên: 07/08/2014, 14:20

... CHARACTERIZATION OF GREEN POLYMERS Thermal Analysis 13 Other Characterization Methods 25 Chapter THERMAL PROPERTIES OF CELLULOSE AND ITS DERIVATIVES Introduction 39 Thermal Properties ... high profile research subjects in academic and industrial fields The authors of this book have continuously made efforts to investigate the properties, especially thermal properties, of green ... Hot 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...

Ngày tải lên: 11/08/2014, 06:20

... Conformation of thermal analysis apparatuses 1.1 Thermogravimetry (TG) 1.1.1 TG-differential thermal analysis (DTA) Thermogravimetry is the branch of thermal analysis which examines the mass change of ... 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 ... Yano S., 1993, Dynamic viscoelastic properties of carboxymethylcellulose during isothermal water sorption, Polymer, 34, 2528-2532 50 Manabe, S., Iwata M., Kamide, K., 1986, Dynamic mechanical absorptions...

Ngày tải lên: 11/08/2014, 06:20

... processes Mechanical and chemical properties of polymer change in the presence of a characteristic amount of water At the same time, the behaviour of water is transformed in the presence of a polymer ... 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, ... of coagulating bath = cm [66] Thermal Properties of Cellulose and Its Derivatives 75 Figure 3-42 Scanning electron micrograph of cross section view of cellulosic hollow fibre 3.6.2 Melting of...

Ngày tải lên: 11/08/2014, 06:20

... shows 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 ... of sec were accumulated Each spectrum was recorded every 30 sec The resolution of the spectra was cm-1 Figure 5-48 Absorbance of characteristic peaks of gas evolved by thermal decomposition of ... decomposition of KL Lignin 210 6.2 Kinetics of thermal decomposition of lignin TG has extensively been used to analyze kinetic parameters of thermal decomposition of polymeric materials In order to obtain...

Ngày tải lên: 11/08/2014, 06:20