Environment-induced self-assembly in phase separated block copolymer systems

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dc.contributor.authorDutta, NKen_AU
dc.contributor.authorThompson, Sen_AU
dc.contributor.authorChoudhury, NRen_AU
dc.contributor.authorKnott, RBen_AU
dc.date.accessioned2022-05-23T04:55:16Zen_AU
dc.date.available2022-05-23T04:55:16Zen_AU
dc.date.issued2005-11-27en_AU
dc.date.statistics2022-05-15en_AU
dc.descriptionPhysical copy held by ANSTO Library at DDC 539.7217/2en_AU
dc.description.abstractPolymer chain sequence with different repeating unit and thermodynamic incompatibility between the segments can be chemically linked together through covalent bonds to form block copolymers of unique ordered microstructure and characteristics. Such block copolymers are characterized by fluid-like disorder ion the molecular scale and a high degree of morphological order at longer length scales, resulting in complex equilibrium phase behaviors, giving rise to a large variety of microdomain structures. A specific block copolymer may be optimum nanomaterial, either for their intrinsic properties as self-organized assemblies; or could be used as a strategy to template the organization of the desired inorganic. semi-conducting, metallic or biologically relevant materials into particles, nano planes, wires, or spheres within the polymer matrix. The amphiphilic block copolymers that self-assemble in selective solvents are also of significant scientific interest and of extensive importance in the field of controlled drug delivery systems, detergents, paints, cosmetics, oil recovery.. The situation is versatile and complicated since for a block copolymer system a solvent that is good for one block may be neutral, slightly selective, or strongly selective, or a non-solvent for the other block/ls. in multiblock copolymer with selective solvents the dramatic expansion of parameter space poses both experimental and theoretical challenges; and there has been very limited systematic research on the environment-induced self-organization of the phase behavior of triblock copolymer. ln this research work the effect of selective solvent and temperature on the phase behavior of a polystyrene-b-(ethylene-co-butylene)-b-styrene triblock copolymer (SEBS) are presented. We examine the adaptive nature of the ordering in asymmetric block copolymers, using a small angle neutron scattering techniques (SANS). The effect of solvent selectivity and temperature on the evolution of the scattering pattern and trends of the interference maximum in the lovv q (structure factor related to interdomain interference and indicates relatively higher level of ordering of the micelle cores) and high q regimes (form factor related to the contribution of the smaller intradomain distances) has been monitored. The organizational behavior has also been confirmed using Atomic force microscopy (AFM), transmission electron microscopy (TEM) and rheolgical investigation. Morphological evolution of the self-assembled phase behavior of such polymer with the thermodynamic selectivity of solvent, temperature, heat treatment, and time will been discussed in detail. © The Authorsen_AU
dc.identifier.citationDutta, N. K., Thompson, S., Roy Choudhury, N., & Knott, R. (2006). Environment-induced self-assembly in phase separated block copolymer systems. Paper presented at the Eighth International Conference on Neutron Scattering ICNS 2005: "Neutrons for structure and dynamics - a new era", Sydney Convention & Exhibition Centre, Sydney, Australia, 27 November-2 December 2005. In Final Programme and Abstract Book, (pp. 270-271).en_AU
dc.identifier.conferenceenddate2 December 2005en_AU
dc.identifier.conferencenameEighth International Conference on Neutron Scattering ICNS 2005: 'Neutrons for structure and dynamics - a new eraen_AU
dc.identifier.conferenceplaceSydney, Australiaen_AU
dc.identifier.conferencestartdate27 November 2005en_AU
dc.identifier.urihttps://apo.ansto.gov.au/dspace/handle/10238/13193en_AU
dc.language.isoenen_AU
dc.publisherThe Bragg Institute, Australian Nuclear Science and Technology Organisationen_AU
dc.subjectAsymmetryen_AU
dc.subjectButenesen_AU
dc.subjectCopolymersen_AU
dc.subjectEthyleneen_AU
dc.subjectGelsen_AU
dc.subjectMorphologyen_AU
dc.subjectNanostructuresen_AU
dc.subjectNeutron diffractionen_AU
dc.subjectSmall angle scatteringen_AU
dc.subjectSolventsen_AU
dc.subjectStructural chemical analysisen_AU
dc.subjectStyreneen_AU
dc.titleEnvironment-induced self-assembly in phase separated block copolymer systemsen_AU
dc.typeConference Abstracten_AU
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