12/17/2010
Tunable microstructures and mechanical deformation in transparent poly(urethane urea)s
( 123–135)Journal of Polymer Science B: Polymer Physics 49, #2 (2011)
Rinaldi et al found that increasing the hard segment (HS) content increases the stiffness and flow stress levels, whereas altering the soft segment (SS) molecular weight from 2000 to 1000 g/mol leads to an enhanced phase mixing with a SS Tg shifted -17 °K toward higher temperatures as well as broadening of the SS relaxation closer to room temperature.   (RDC 12/21/2010)