Dynamic Mechanical Analysis part 3 pptx
Dynamic Mechanical Analysis part 3 pptx
... = 29.6 cm 3 1 in 3 = 16.4 cm 3 1 qt(l) = 0.946 dm 3 1 qt(s) = 1.1 dm 3 1 ft 3 = 0.028 dm 3 1 yd 3 = 0.0765 dm 3 1 gal(l) = 3. 79 dm 3 Time 1 ... W = 44.2 ft*lb/min 1 W = 2 .35 Btu/h 1 kW = 1 .34 hp (electric) 1 kW = 0.28 ton (HVAC) Temperature 32 °F = 491.7 R 32 °F = 0°C 32 °F = 2 73. 2 K 0°C = 32 °F 0°C = 2 73. 2 K NOTES 1. R....
Ngày tải lên: 05/08/2014, 09:19
Dynamic Mechanical Analysis part 4 pptx
... treated as mainly reciprocal, 13 and roughly related as (3. 5) The analysis of the stress relaxation curve is shown in Figure 3. 8a and is analogous to the creep analysis. One interesting application ... data as used to determine the T g (Figure 3. 11b). Since many materials are used in contact with a dissimilar material FIGURE 3. 10 Thermomechanical analysis test methods in c...
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Dynamic Mechanical Analysis part 1 doc
... Creep–Recovery Tests 3. 10 Thermomechanical Analysis Notes Chapter 4 Dynamic Testing 4.1 Applying a Dynamic Stress to a Sample ©1999 CRC Press LLC dynamic measurements were an integral part of polymer ... Calculating Various Dynamic Properties 4 .3 Instrumentation for DMA Tests 4 .3. 1 Forced Resonance Analyzers 4 .3. 2 Stress and Strain Control 4 .3. 3 Axial and Torsion...
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Dynamic Mechanical Analysis part 2 ppt
... samples. Examples include hydrogels tested in saline, 35 fibers in solutions, 36 and collagen in water. 37 UV light can be used to cure samples 38 to mimic processing or operating conditions. A specialized ... ©1999 CRC Press LLC quantifying the data can be used, as shown in Figure 1.10, 33 and will be discussed in Chapter 3. Comparing materials after multiple cycles can be used to...
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Dynamic Mechanical Analysis part 5 docx
... only plot dynamic stress vs. dynamic strain, but also get E¢, E≤, E*, tan d, h*, and other dynamic properties for each cycle. This allows us to plot those properties as a function of dynamic stress ... as ©1999 CRC Press LLC FIGURE 4.15 Results from dynamic stress–strain curves showing (a) the relationship between dynamic stress and strain and (b) tan d vs. dynamic strain for tw...
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Dynamic Mechanical Analysis part 6 pdf
... 1980, Ch. 5–7. 3a. R. Armstrong, B. Bird, and O. Hassager, Dynamics of Polymer Fluids, vol. 1, Fluid Mechanics, 2nd ed., Wiley, New York, 1987, pp.151–1 53. 3b. D. Holland, J. Rheology, 38 (6), p. 1941, ... sometimes-dramatic increase in modulus (Figure 5. 13) . DSC or its temperature-modulated variant, dynamic differential scanning calorimetry (DDSC), can be used to confirm this. 39 The...
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Dynamic Mechanical Analysis part 7 docx
... Measurement of Viscoelastic Properties by Dynamic Mechanical Analysis, Masters thesis, Univer- sity of Texas at Austin, 1994. R. Hagan, Polymer Testing, 13, 1 13, 1994. 3. S. Goodkowski and B. Twombly, ... 19 53. 5. R. Bird, C. Curtis, R. Armstrong, and O. Hassenger, Dynamics of Polymer Fluids, vol. 1 & 2, 2nd ed., Wiley, New York, 1987. 6. J. D. Ferry, Viscoelastic Properties of P...
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Dynamic Mechanical Analysis part 8 potx
... glass, the gel, the rubbery, and the charring regions. 31 These diagrams are also generated from DSC data, 32 and several variants, 33 such as the continuous heating transformation and conversion-temperature-property ... This is also done with thin films and adhesive coatings. A sample cure profile for a commercial two -part epoxy resin is shown in Figure 6.6. From this scan, we can dete...
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Dynamic Mechanical Analysis part 9 doc
... of mea- surement. 13 Rosen 13 points out that the quick estimate of l is the relaxation time taken from a creep–recovery experiment as described in Chapter 3. 4, where the time required ... than for uncoordinated ones. This is shown in Figure 7.13b. This can be exploited when investigating a polymer product for competitive analysis. By plotting the log of the frequency dep...
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Dynamic Mechanical Analysis part 10 docx
... stress relaxation modulus, E¢ is the storage modulus from the dynamic experiment, w is the dynamic test frequency, and E≤ is the dynamic loss modulus. A similar equation exists for the compliance, ... curve. Plotting the log a t against (1/T – 1/T r ) will allow us to calculate E from the slope. 33 As these values depend on the molecular parameters of the polymer, they can be used as...
Ngày tải lên: 05/08/2014, 09:19