Dynamic Mechanical Analysis part 4 pptx

... out-of-phase strains that corresponds to curves like those in Figure 4. 2a and 4. 2b, respectively. These sum to the curve in 4. 2c and are FIGURE 4. 2 Responses. When the material responds to the applied ... LLC (4. 10) (4. 11) and the vector sum of these two components gives us the overall or complex strain on the sample (4. 12) This relationship can be seen as the triangle...

Ngày tải lên: 05/08/2014, 09:19

... CONVERSION FACTORS Length 1 mil = 0.00002 54 m 1 thou = 0.02 54 mm 1 in. = 25 .4 mm 1 ft = 3 04. 8 mm 1 yd = 9 14. 4 mm 1 mi = 1.61 km Area 1 in. 2 = 645 .2 mm 2 1 ft 2 = 0.092 m ... W 1 ft-lb/s = 1 .4 W 1 cal/s = 4. 2 W 1 hp (electric) = 0. 746 kW 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...

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... Deformation 4. 3 .4 Free Resonance Analyzers 4. 4 Fixtures or Testing Geometries 4. 4.1 Axial 4. 4.2 Torsional 4. 5 Calibration Issues 4. 6 Dynamic Experiments Appendix 4. 1 Calibration and Verification of an ... LLC 4. 2 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 an...

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... or processing enter the picture, we can see different behavior depending how a static stress 4 is applied and what mode of deformation is used. Figure 2.3 summarizes the main ways of applying ... aging in creep studies by using oxidative or reductive gases, UV exposure, or solvent leaching. 34 1.5 ODDS AND ENDS Any of these tests mentioned above can be done in controlled-environment co...

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... used to check the melting point of Indium. ©1999 CRC Press LLC 4. 4.1 .4 Bulk If we run a sample in a dilatometer-like fixture (Figure 4. 9d) where it is restrained on all sides, we measure the bulk ... and plate/plunger system must still be able to move freely without binding. 4. 4.1.5 Extension/Tensile Extension or tensile analysis (Figure 4. 10a) is done on samples of all types and i...

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... Bird, and O. Hassager, Dynamics of Polymer Fluids, vol. 1, Fluid Mechanics, 2nd ed., Wiley, New York, 1987, pp.151–153. 3b. D. Holland, J. Rheology, 38(6), p. 1 941 , 19 94. 4. J. Gillham in Developments ... associates of segments on cooling. 44 While this transition is reversible, it is not always easy to see, and Boyer spent many years trying to prove it was real. 45 Not everyone accep...

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... Measurement of Viscoelastic Properties by Dynamic Mechanical Analysis, Masters thesis, Univer- sity of Texas at Austin, 19 94. R. Hagan, Polymer Testing, 13, 113, 19 94. 3. S. Goodkowski and B. Twombly, ... Perkin-Elmer, Norwalk, 56, 19 94. 4. P. Flory, Principles of Polymer Chemistry, Cornell University Press, Ithaca, NY, 1953. 5. R. Bird, C. Curtis, R. Armstrong, and O. Hassenger, Dy...

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... review 34 will hopefully increase the use of this approach. FIGURE 6. 14 The Gillham–Enns or TTT diagram. (From J. K. Gillham and J. B. Enns, Trends in Polymer Science, 2(12), 40 6 41 9, 19 94. With ... vital part of the curing process. The cure profile is both a good predictor of performance as well as a sensitive probe of processing conditions. We will discuss the former case under Se...

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... stress different from h¢ and h≤. Launn’s rule is similar to the Cox–Merz rule above and states 24 (7. 14) A mirror relation has also been proposed by Gleissele: 25 (7.15) where k is a constant between ... ± 10%. Another approach, which we discussed in Chapter 4, is the Gleissele mirror relationship, 9 which states the following: (7 .4) when h + ( t ) is the limiting va...

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... relaxation mas- tercurve: 40 (7.21) where E(t) is the 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. ... )+ . ( )( ) ¢ ≤≤ww w w 04 04 00 14 10 EtJt d t() ( )-= Ú tt 0 1 ©1999 CRC Press LLC a mixing rule. A mixing rule is a quantitative relationship that relates the observed mec...

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