Chemical imaging of phase separated polymer blends by fluorescence microscopy

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Show simple item record Serrano Prieto, María Bernarda Baselga Llidó, Juan Bravo de Pedro, Julio Mikes, Frantisek Sesé, L Esteban, I Fernández de Piérola, Inés 2017-05-30T10:09:15Z 2017-05-30T10:09:15Z 2000-06-01
dc.identifier.bibliographicCitation Journal of Flourescence,(2000), 10(2), 135-139
dc.identifier.issn 1053-0509
dc.description.abstract Blends of poly(vinylacetate) (PVAc) and poly(cyclohexylmethacrylate) (PCHMA) labeled by copolymerization with 4-methacryloylamine-48-nitrostilbene (Sb), with (1-pyrenylmethyl)methacrylate (Py), or with 3-(methacryloylamine)propyl-N-carbazole (Cbz) were prepared by casting dilute solutions in tetrahydrofurane (THF) or chloroform. Films about 10 mm thick were formed. Phase separation in two types of domains is observed by transmission optical microscopy (TOM) and epifluorescence microscopy (EFM): small craters of 1 to 10 mm placed at the polymer–air interface and larger domains, on the scale of 100 mm. The morphology of samples depends on the composition of the polymer blend and on solvent. The green fluorescence of Sb, the violet of Py, or the blue of Cbz provides imaging of the distribution of PCHMA in the different domains and in the matrix. It is thus observed that (i) superficial craters and large domains are formed mainly by PCHMA and (ii) the matrix is composed of PVAc in films cast from THF and it is a blend of the two polymers, homogeneous at the submicrometric scale, for chloroform. The emission intensity of Py, recorded by microfluorescence spectroscopy (MFS), yields a mapping similar to imaging detection. It is remarkable that in films cast from chloroform, the smaller domains are distributed with a 2D hexatic order disrupted by dislocations and disclinations, whereas in films cast from THF, a larger heterogeneity is found, denoting different mechanisms of solvent evaporation.
dc.description.sponsorship This work was supported by CICYT (Spain) and Brite-Euran (EU) under Grants PB95-0247 and BE-97-4672, respectively.
dc.format.extent 5
dc.format.mimetype application/pdf
dc.language.iso eng
dc.publisher Plenum Publishing
dc.rights © Plenum Publishing Corporation, 2000
dc.subject.other Fluorescence microscopy
dc.subject.other chemical imaging
dc.subject.other polymer blends
dc.title Chemical imaging of phase separated polymer blends by fluorescence microscopy
dc.type article
dc.subject.eciencia Materiales
dc.identifier.doi 10.1023/A:1009439024969
dc.rights.accessRights openAccess
dc.type.version acceptedVersion
dc.identifier.publicationfirstpage 135
dc.identifier.publicationissue 2
dc.identifier.publicationlastpage 139
dc.identifier.publicationtitle Journal of fluorescence
dc.identifier.publicationvolume 10
dc.identifier.uxxi AR/0000010938
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