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Inversion of crystallization rates in miscible block copolymers of poly(lactide)-

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dc.contributor Aalto-yliopisto fi
dc.contributor Aalto University en
dc.contributor.author Pooch, Fabian
dc.contributor.author Sliepen, Marjolein
dc.contributor.author Svedström, Kirsi J.
dc.contributor.author Korpi, Antti
dc.contributor.author Winnik, Françoise M.
dc.contributor.author Tenhu, Heikki
dc.date.accessioned 2018-05-22T14:28:39Z
dc.date.available 2018-05-22T14:28:39Z
dc.date.issued 2018-04-14
dc.identifier.citation Pooch , F , Sliepen , M , Svedström , K J , Korpi , A , Winnik , F M & Tenhu , H 2018 , ' Inversion of crystallization rates in miscible block copolymers of poly(lactide)- : Block -poly(2-isopropyl-2-oxazoline) ' , Polymer Chemistry , vol. 9 , no. 14 , pp. 1848-1856 . https://doi.org/10.1039/c8py00198g en
dc.identifier.issn 1759-9954
dc.identifier.issn 1759-9962
dc.identifier.other PURE UUID: 0aa04cee-59f1-4b48-bb6a-d1ddc4e90001
dc.identifier.other PURE ITEMURL: https://research.aalto.fi/en/publications/0aa04cee-59f1-4b48-bb6a-d1ddc4e90001
dc.identifier.other PURE LINK: http://www.scopus.com/inward/record.url?scp=85045059626&partnerID=8YFLogxK
dc.identifier.other PURE FILEURL: https://research.aalto.fi/files/19265052/Pooch_et_al_2018_Inversion_of_crystallization_Polymer_Chemistry.pdf
dc.identifier.uri https://aaltodoc.aalto.fi/handle/123456789/30751
dc.description.abstract Miscible block copolymers (BCPs) are rarely studied. When one or both components of such BCPs are semi-crystalline polymers, strong effects on the crystallization behavior can be expected. We present a study of 18 miscible BCPs comprised of poly(lactide) (PLLA, semi-crystalline and PDLLA, amorphous) and poly(2-isopropyl-2-oxazoline) (PiPOx, semi-crystalline) with PiPOx volume fractions of 0.14 < φPiPOx < 0.82. All BCPs exhibit a single glass transition and form a homogeneous melt. Mixing has a plasticizing effect on PiPOx and increases its crystallization rates (DSC). In contrast, the crystallization rates of PLLA are dramatically reduced, or in most cases entirely prevented. During isothermal crystallization at 130 °C, the crystallization rates of the BCPs were inverted in comparison with those of the parent homopolymers. Crystallization drives the BCPs to phase separate and the formed crystalline structure is that of the parent homopolymers. The fast crystallization of PiPOx confines the observed superstructure. The BCPs were studied on multiple length scales-from the atomic level (WAXS, IR spectroscopy) to the meso level (AFM, SAXS) and the macroscopic superstructure (polarized optical microscopy). A mechanism of the structure evolution is presented. en
dc.format.extent 9
dc.format.extent 1848-1856
dc.format.mimetype application/pdf
dc.language.iso en en
dc.relation.ispartofseries Polymer Chemistry en
dc.relation.ispartofseries Volume 9, issue 14 en
dc.rights openAccess en
dc.title Inversion of crystallization rates in miscible block copolymers of poly(lactide)- en
dc.type A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä fi
dc.description.version Peer reviewed en
dc.contributor.department University of Helsinki
dc.contributor.department Department of Bioproducts and Biosystems
dc.identifier.urn URN:NBN:fi:aalto-201805222191
dc.identifier.doi 10.1039/c8py00198g
dc.type.version publishedVersion

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