1994
DOI: 10.1002/actp.1994.010450307
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Ordering kinetics in a symmetric diblock copolymer

Abstract: Small angle X-ray scattering (SAXS) and rheology are employed to study the microphase separation transition in a symmetric poly(styrene-b-isoprene) diblock copolymer. The order-disorder transition temperature Toor has been identified with a good precision ( ToDT =359 K) and the interaction parameter is extracted using mean field theory at temperatures well above TODT. The kinetics of microphase separation have been studied by means of rheology in a small temperature range below the order-disorder transition, f… Show more

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Cited by 84 publications
(110 citation statements)
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“…The linear complex moduli of polycrystalline lamellar phases are nearly equal with a weak power law dependence, G 0 B G 00 B ω 1/2 , which has been observed experimentally [63,68,79] and predicted theoretically [80][81][82]. This peculiar response is believed to be a consequence of a distribution of domain orientations, which yields a macroscopic response intermediate between that of a liquid (G 0 B ω 2 and G 00 B ω) and a solid (G 0 B ω 0 ) [80].…”
Section: Lamellar Phasesupporting
confidence: 58%
See 1 more Smart Citation
“…The linear complex moduli of polycrystalline lamellar phases are nearly equal with a weak power law dependence, G 0 B G 00 B ω 1/2 , which has been observed experimentally [63,68,79] and predicted theoretically [80][81][82]. This peculiar response is believed to be a consequence of a distribution of domain orientations, which yields a macroscopic response intermediate between that of a liquid (G 0 B ω 2 and G 00 B ω) and a solid (G 0 B ω 0 ) [80].…”
Section: Lamellar Phasesupporting
confidence: 58%
“…In this respect, the true ODT is the so-called equilibrium ODT [67]. The kinetics of ordering of block copolymers has been studied in great detail using combination of shear rheology and time-resolved small-angle X-ray scattering (SAXS) experiments [66,[68][69][70][71]. In general, the results are well described by the Avrami equation that also applies to the kinetics of crystallization.…”
Section: Disorder-to-order Transitionsmentioning
confidence: 99%
“…7͑a͒ for SI-C and for quenches to different final temperatures below the T ODT ͑ϭ371 K͒. The GЈ(t) and GЉ(t) curves exhibit the familiar ''S'' shape, as with the SI-85/65 sample studied earlier, 6 with the long-time plateau corresponding to the equilibrium shear moduli of the lamellar morphology. The ordering kinetics-which in contrast to the mechanism of spinodal decomposition depend strongly on the undercooling ͑T ODT ϪT͒-have been analyzed in terms of a nucleation and growth model of the Avrami class.…”
Section: Resultsmentioning
confidence: 58%
“…The scattering intensity, after correcting for the density fluctuations, 6 was radially averaged and the result is shown in Fig. 1 as a function of the scattering angle for one orientation ͑radial͒.…”
Section: Resultsmentioning
confidence: 99%
“…In Ref. [49], the effect of zwitterionic substitution on diblock and triblock copolymers has been studied with rheological and dielectric spectroscopy and SAXS experiments to explore the aggregation of the terminal groups and the dynamics. The aggregation processes strongly influence the electron density profile.…”
Section: Spherical Self-assembled Telechelic Chainsmentioning
confidence: 99%