Polystyrene shear storage modulus

Figure 9.21 Shear storage modulus versus frequency for narrow molecular-weight polystyrenes at 160°C. Molecular weights range from Mw= 8900g/mol (L9) to /Wiv=581,000g/mol (LI 8) (88).

Figure 22 Shear storage modulus G and damping, A = )ttan4 in polyisobutylene (i), polystyrene (ii) and poly-...

Oscillatory shear data on dilute solutions of polystyrene with M= 860000 gmol in two -solvents (circles are in decalin at 16°C and squares are in di-2-ethylhexyl phthalate at 22 °C). Open symbols are the dimensionless storage modulus and filled symbols are the dimensionless loss-... 

If we plot isothermal shear data for the storage modulus as a function of the circular frequency at a series of temperatures, we obtain results of the type shown in Figure 12.16 [26]. The polymer is a polystyrene melt of narrow molecular-... 

Figure 13.14 Dynamic storage shear modulus as a function of temperature for a series of polyisoprene-polystyrene diblock copolymers. Open and filled arrows indicate order-order and order-disorder phase transitions, respectively. The y-axis data have been multiplied for clarity sample g has the actual values of G. Note that all samples are above the glass transition temperatures of both polymers, and hence In the melt state.

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