deformation and fracture of polymer blends

... Radical Polymerization of StyT€n . - ch ng Hư, 17 Types of Polystyrene MoleCes§ . - c1 9H HH như 18 Ziegler-Natta Polymerization of Ethylene - cong hưu 22 Ring Opening Polymerization of e-CaproÌaCtOn€ ... 7: Structure of Polymers Branched polymers can be thought of as linear polymers with branches of the same basic structure as the main chain They can be distinguished from linear polymers by ... to the outstanding properties of carbon nanotubes and the common use of polymers in space this research has the potential to substantially enhance spacecraft missions A number of polymers were...

Ngày tải lên: 14/11/2014, 12:32

... formation of micro- and nanofibrillar structures of polymer blends within the fiber formation zone in the melt spinning process came recently into the focus of con-siderable academic and industrial ... specific fiber length for calculation of the linear density of fiber by Kase and Matsuo7 and determination of the fiber diameter by Ishibashi et al.8and Oh.9 Two kinds of PLA/PVA-filament samples were ... fibrillation process and controlling the micro-and nanofibrillar structures of the dispersed PLA phase in PLA/PVA-fil-aments (see ref 5) The findings of the current study provide a systematical and thorough...

Ngày tải lên: 16/12/2017, 07:54

... background and literature review on (i) current nanofabrication techniques, (ii) applications of polymer nanostructures in biomedical fields and (iii) actuation of polymer micro- and ... add to the existing knowledge of polymer nanofabrication by demonstrating the possibilities of fabricating polymer micro- and nanostructures in easy and costeffective ways The various ... polymer nanofabrication processes After that, the applications of such polymer nanostructures in biomedical fields and as actuators... 0.4 μm diameter and 1.6 μm spacing (b) and...

Ngày tải lên: 10/09/2015, 09:30

... concept of SBI is of fundamental importance for a shift of paradigm in the future study of MGs The fourth contribution of this work is to uncover the mechanisms of the plastic serrated flow and fracture ... viscosity of the shear band by several orders of magnitude, and thus serving as a cause of the Trang 40shear banding In both cases, a decrease in viscosity localizes the deformation and leads ... density of shear band) measuring the shear banding progress 76 Figure 4.4 Engineering stress-strain curves of 2:1 samples measured for a range of controlled values of sample size and machine...

Ngày tải lên: 14/09/2015, 08:43

... with samples of polymer of known olecular weights Determination of polymer molecular weight by measurement of the viscosity of polymer solutions is based on the fact that, as polymer molecular ... Trang 1EVALUATION,CHARACTERZATION AND ANALYSIS OF POLYMER Tiểu luận Hóa học polymer Trang 2hapter: MỤC LỤC hapter: E EVALUATION,CHARACTERZATION AND ANALYSIS OF POLYMER Characterization techniques ... and light scanttering Which are absolute methods in that they allow molecular weight determinations of unknown polymers,viscometry is a relative method and requires calibration with samples of...

Ngày tải lên: 12/04/2017, 14:40

... composed of polymer brushes and nanoparticles can be conducted with appropriate graft strategies In terms of polymer composition, random copolymers, block copolymers, and even gradient copolymers ... the RAFT polymerization of AHMA and MMA (1:20) ([monomer]: [CPDB]: [V-70] = 300:1:0.1, 40 °C) .36 Figure 2.4 1H NMR spectrum of prepolymer 2 37 Figure 2.5 IR spectra of prepolymer 1 and the resultant ... distributions of the SFP samples (red dash lines) and their prepolymers (blue solid lines) 48 Figure 2.14 SEM images of polymer 1’ – 8’ 50 Figure 2.15 GPC traces of three groups of polymers before...

Ngày tải lên: 21/10/2022, 18:20

... spectra of PMMA/PVC blends showed that there were molecular interactions between C=O groups of PMMA and C-Cl groups of PVC Assignments of infrared absorption bands for specific groups of PMMA/PVC blends ... miscibility of PMMA/PVC blends depends on molecular weights and proportion of each component [8-14], Therefore, using of a compatibilizer can further improve properties of the PMMA/PVC blends Recently, ... Trang 43 RESULTS AND DISCUSSIONS 3.1 Groups assignments and molecular interactions in PMMA/PVC blends Figure 1 displays FTIR spectra of neat PMMA, neat PVC and PMMA/PVC blends Band assignments...

Ngày tải lên: 10/10/2022, 15:46

... A total of 110 mg of partially purified extracellular polymer was obtained from 274.8 mg of the crude polymer by this procedure Trang 6Components of extracellular polymer Components of the extracellular ... activities of the pronase-digested polymer, the heat-treated polymer and the intact polymer for kaolin clay (each polymer concentration was 5 ppm) The flocculating activity of the pronase-digested polymer ... 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 neutral sugar analysis showed that the neutral sugar was composed of...

Ngày tải lên: 05/09/2013, 09:08

... applications, and the durability of fuel cell stack components remains, in most cases, insufficiently understood Lengthy required testing times, lack of understanding of most degradation mechanisms, and ... during fuel cell running due to the changes of temperature and relative humidity A unique feature of the present model is to incorporate the effect of hygro and thermal stresses into actual three-dimensional ... causes the plastic deformation The mechanical behaviour of the membrane depends strongly on hydration and temperature [8-10] Al-Baghdadi [11] incorporated the effect of hygro and thermal stresses...

Ngày tải lên: 05/09/2013, 14:58

... bundles and random networks, and thus, they were not well stretched (Figure 3f). It was reported that the surface tension and the density of amine groups on the surface determined the degree of ... images of the DNA molecules that were stretched and immobilized on the N2 plasma-treated polymer film synthesized with 30 W of RF power (b) The scan profile along the white line of the ... stretched and aligned along the direction of the sample's tilting. For the synthesis of the conductive nanowire, DNA molecules were treated with AN-AuNPs of 60 µL for 30 min; AN-AuNPs of 60...

Ngày tải lên: 20/06/2014, 23:20

... with a hip fracture, three on fractures of the wrist/distal forearm, and two included several fracture sites consistent with a fragility fracture All studies reported positive effects of the intervention ... risk of fracture [21-23], and drug treat-ments have been shown to significantly reduce the rates of subsequent fragility fractures, even in individuals with advanced bone loss and prevalent fractures ... bone: the result of reduced compressive and/or torsional strength of bone’ [12] It is a strong indicator of underlying osteoporosis, and it has been shown that adults who sustain a fracture are over...

Ngày tải lên: 10/08/2014, 10:23

... Comparison of routine 13C NMR and 13C DEPT of dea-PPETE 52 Figure 2-8 2D Heteronuclear (C,H)-Correlated NMR of dea-PPETE 52 Figure 2-9 UV-Vis and emission spectra of model PPETE, dea-PPETE and tmeda-PPETE ... conjugated polymer sensor involved the introduction of molecular recognition units directly into the conjugation of the polymer backbone An elegant example of this was the polymer synthesized by Wang and ... Structures of polymer as fluorescence “turn-on” sensors 21 Figure 1-18 Structure of a conjugated polymer showed fluorescence “turn-on” upon trysin 22 Figure 1-19 Structure of the two polymer components...

Ngày tải lên: 13/11/2014, 10:54

... Straining of a cracked specimen before and after loading Tiff file of deformation at 0% strain Tiff file of deformation at 1% strain Tiff file of deformation at 2% strain Tiff file of deformation ... configurations 1, 2 and 3 of the sequential deformation IMAGE 1 DEFORMATION A IMAGE 2 GLOBAL | DEFORMATION DEFORMATION B IMAGE 3 › aA Trang 20 Between image 1 and 2 (deformation A) and between ... Figure 24 Tiff file of deformation at 4% strain 45 Figure 25 Tiff file of deformation at 5% strain 46 Figure 26 Tiff file of deformation at 6% strain 47 Figure 27 Tiff file of deformation at 7%...

Ngày tải lên: 29/11/2014, 07:05

... Prediction of Polymer Properties: Third Edition, Revised and Expanded, Jozef Bicerano Fundamentals of Polymer Engineering, Anil Kumar and Rakesh K Gupta Handbook of Polypropylene and Polymer, Harutun ... composites, and biomedical materials by means of electron and atomic force microscopy His special field of interest is the study of toughness enhancement and of the mechanisms of deformation and fracture ... Donald G LeGrand and John T Bendler Handbook of Polyethylene: Structures, Properties, and Applications, Andrew J Peacock Polymer and Composite Rheology: Second Edition, Revised and Expanded, Rakesh...

Ngày tải lên: 04/06/2014, 14:26

... reducing the risk of hot cracking The melting of the wire also reduces the temperature of the molten metal, which also reduces the risk of hot cracking For MIG welding of common steels of type AISI ... or descriptions of the end use or application of products or methods of working are for information only and the company and its subsidiaries accept no liability in respect thereof Before using ... mechanical strength of ferritic-austenitic steels, machining and joint preparation may demand certain consideration The use of planar machines or lathes has proven to be the easiest method of joint preparation...

Ngày tải lên: 14/03/2014, 12:21

... grains Chats are sand tailings from the Missouri lead ores, used for sawing stone Banding sand is used for the band grinding of tool handles and for the grinding of plate glass, but is often replaced ... sandpaper The chief types of abrasive sand include sandblast sand, glass-grinding sand, and stone-cutting sand Sand for stone sawing and for marble and glass grinding is usually ungraded, with no ... provide a variety of colors and surface effects: the high gloss of a marble surface; the shadow, light, and 3D visual effect of granite; the look of gun metal; and the glitter of quartz or gold...

Ngày tải lên: 13/02/2014, 09:20

... relative location of Cys41, 57, 69, 72, 83 and 139 when compared with the proteinases of G lamblia and G gallus All Cys and Trp residues are absolutely conserved in a-expansins and b-expansins ... Alignment of Phl p (GenBank Z27090), Hol l (Z68893), G lamblia cathepsins 1–3 (U83275, U83276 and U83277, respectively) and G gallus cathepsin B (U18083) Areas of identity are boxed, and areas of similarity ... than rPhl p Q during expression and purification, and rPhl p N-containing supernatant Fig Comparison of the expression and enzymatic activity of recombinant Phl p N and Q Sizes in kDa are indicated...

Ngày tải lên: 08/03/2014, 22:20

... also reported random binding of NAD+ and Man-ol1P [29] It is reasonable to assume that random binding of reactants by AfM1PDH and AfM2DH occurs in rapid equilibrium, and the absence of curvature ... C) about one order of magnitude below the sH of AfM1PDH also randomness in the binding of substrate and coenzyme in each direction of the reaction catalyzed by AfM2DH By way of comparison, an ... force for reduction of Fru6P and oxidation of Table Inhibition of AfM1PDH and AfM2DH by adenine nucleotides at pH 7.1 and 25 C KiEI is a constant describing competitive inhibition of AMP, ADP or ATP...

Ngày tải lên: 14/03/2014, 23:20

... set F of G is a non-empty set of subgroups of G such that if H ∈ F and g ∈ G, then H g ∈ F, if H ∈ F and S is a subnormal subgroup of H, then S ∈ F, and if N1 and N2 are normal F-subgroups of the ... Nc of nilpotent groups of class at most c, the class S(d) of soluble groups of derived length at most d, the class E(n) of groups of exponent at most n, the class U of supersoluble groups, and ... because of the preceeding argument and applying [Hup67, III, 2.11].This completes the induction step and with it the proof of the lemma Proof (of Theorem 2.2.6) Assume that the result is not true and...

Ngày tải lên: 12/05/2014, 01:59

... reported Figure exclusion Flow diagram of process of outcome measure inclusion and Flow diagram of process of outcome measure inclusion and exclusion uring the domain of mobility Although the qualitative ... scores and measures of related constructs A Spearman's rank correlation of 0.76 between HABAM and BI change scores was Page of 15 (page number not for citation purposes) Health and Quality of Life ... EMS and original HABAM but not for the PPME This is a limitation of the EMS and HABAM as important change and measure- Page 11 of 15 (page number not for citation purposes) Health and Quality of...

Ngày tải lên: 18/06/2014, 22:20