Dynamic Mechanical Analysis part 5 docx

... 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 two materials. ... 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...

Ngày tải lên: 05/08/2014, 09:19

... Perkin-Elmer, Norwalk, 56 , 1994. 4. P. Flory, Principles of Polymer Chemistry, Cornell University Press, Ithaca, NY, 1 953 . 5. R. Bird, C. Curtis, R. Armstrong, and O. Hassenger, Dynamics of Polymer ... Rheology, MIT, Cambridge, 1990. R. De le Garza, Measurement of Viscoelastic Properties by Dynamic Mechanical Analysis, Masters thesis, Univer- sity of Texas at Austin, 1994. R. Hagan,...

Ngày tải lên: 05/08/2014, 09:19

... 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, ... Press LLC a mixing rule. A mixing rule is a quantitative relationship that relates the observed mechanical properties of a polydisperse melt and the underlying polymer structure. This ca...

Ngày tải lên: 05/08/2014, 09:19

... Wiley, New York, 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 – 153 . 3b. D. Holland, J. Rheology, ... ways are in current use (Figure 5. 9b). This is not unusual, as DSC has multiple methods too (Figure 5. 9c). Depending on the industry standards or (b) (c) FIGURE 5. 7 (...

Ngày tải lên: 05/08/2014, 09:19

... checking product quality. First is the very simple approach of fingerprinting a resin. Figure 6. 15 shows this for two adhesives; a simple heating run under standardized conditions allows one to ... the materials will need to be held for different times before they are solid enough to FIGURE 6. 15 QC comparisons. Fingerprinting of materials for QC is often done. Good and bad hot melt adhesiv...

Ngày tải lên: 05/08/2014, 09:19

... and states 24 (7.14) A mirror relation has also been proposed by Gleissele: 25 (7. 15) where k is a constant between 2 .5 and 3 for many polymer fluids. Another area of interest is the dependence ... sufficient flow under pressure at low frequency to fill the pores of the material to obtain a good mechanical bond. When the laminate is later subjected to peel, we want the material to be very...

Ngày tải lên: 05/08/2014, 09:19