Soft x-ray diffraction of striated muscle
S.F. Fan, W.B. Yun, et al.
Proceedings of SPIE 1989
Linear viscoelastic dynamic rheological measurements were performed on symmetric diblock copolymers of deuterated polystyrene and poly(n-butyl methacrylate), denoted P(d-S-b-nBMA). Isothermal frequency sweep data weee time-temperature superposed. A transition from a disordered to ordered morphology was found with increasing temperature as a function of molecular weight. P(d-S-b-nBMA) with molecular weights less than 6.8 × 104 were always disordered, as evidenced by the scaling of the storage and loss moduli with frequency at low frequencies, G' ∝ ͩ2 and G' ∝ ͩ. Copolymers with molecular weights above 9.9 × 104 were always ordered, exhibiting very long relaxation times and appearing almost solidlike in the low-frequency limit. Mixtures of the 6.8 × 104 and 9.9 × 104 copolymers, however, showed a transition from fluid to solidlike behavior as the temperature was increased. This rheological data is consistent with the existence of a lower critical ordering temperature, LCOT, where a transition from a disordered to ordered state occuss with increasing temperature. © 1995, American Chemical Society. All rights reserved.
S.F. Fan, W.B. Yun, et al.
Proceedings of SPIE 1989
Sharee J. McNab, Richard J. Blaikie
Materials Research Society Symposium - Proceedings
C.M. Brown, L. Cristofolini, et al.
Chemistry of Materials
D.D. Awschalom, J.-M. Halbout
Journal of Magnetism and Magnetic Materials