caa a22 4500 463231651 CHVBK 20180405153244.0 cr unu---uuuuu 170326e20071201xx s 000 0 eng 10.1007/s10853-007-1947-5 doi (NATIONALLICENCE)springer-10.1007/s10853-007-1947-5 SAXS observation of RCM1 under cyclical shear [Elektronische Daten] [Daniel Cooney, Jonathan DeRocher, Geoff Moggridge, Adam Squires] A cylinder forming poly(styrene-b-butadiene-b-styrene) triblock copolymer melt is cyclically processed through a capillary at a high shear rate in the Cambridge Multipass Rheometer (MPR). Insitu X-ray diffraction experiments enable observation of the effect of the shear on the block copolymer (BCP) nanophase orientation, both during and after processing. Temporal resolution of the X-ray exposures is increased, whilst retaining intensity, by exploiting the cyclical nature of the shear and the material's response to it; short exposures from many cycles, individually having few counts, are added together to produce well resolved X-ray patterns. Orientation of the cylinders reduces during processing, then increases during pauses between processing. The loss of orientation is attributed to the high shear rate deforming the melt faster than the structure can respond, whilst it is believed that melt relaxation, linked to the compressibility of the material, produces much lower shear rates after mechanical processing has ceased, which induces strong orientation of the nanostructure. Springer Science+Business Media, LLC, 2007 Cooney Daniel Department of Chemical Engineering, University of Cambridge, New Museums Site, Pembroke Street, CB2 3RA, Cambridge, UK aut DeRocher Jonathan Department of Chemical Engineering, University of Cambridge, New Museums Site, Pembroke Street, CB2 3RA, Cambridge, UK aut Moggridge Geoff Department of Chemical Engineering, University of Cambridge, New Museums Site, Pembroke Street, CB2 3RA, Cambridge, UK aut Squires Adam Department of Chemistry, The University of Reading, Whiteknights, PO Box 224, RG6 6AD, Reading, UK aut Journal of Materials Science Springer US; http://www.springer-ny.com 42/23(2007-12-01), 9663-9670 0022-2461 42:23<9663 2007 42 10853 https://doi.org/10.1007/s10853-007-1947-5 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10853-007-1947-5 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Cooney Daniel Department of Chemical Engineering, University of Cambridge, New Museums Site, Pembroke Street, CB2 3RA, Cambridge, UK aut NATIONALLICENCE 700 1- DeRocher Jonathan Department of Chemical Engineering, University of Cambridge, New Museums Site, Pembroke Street, CB2 3RA, Cambridge, UK aut NATIONALLICENCE 700 1- Moggridge Geoff Department of Chemical Engineering, University of Cambridge, New Museums Site, Pembroke Street, CB2 3RA, Cambridge, UK aut NATIONALLICENCE 700 1- Squires Adam Department of Chemistry, The University of Reading, Whiteknights, PO Box 224, RG6 6AD, Reading, UK aut NATIONALLICENCE 773 0- Journal of Materials Science Springer US; http://www.springer-ny.com 42/23(2007-12-01), 9663-9670 0022-2461 42:23<9663 2007 42 10853 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer