Cryogenic 4D-STEM analysis of an amorphous-crystalline polymer blend: Combined nanocrystalline and amorphous phase mapping.
Materials characterization
Materials science
Polymer chemistry
Journal
iScience
ISSN: 2589-0042
Titre abrégé: iScience
Pays: United States
ID NLM: 101724038
Informations de publication
Date de publication:
18 Mar 2022
18 Mar 2022
Historique:
received:
01
10
2021
revised:
14
01
2022
accepted:
03
02
2022
entrez:
14
3
2022
pubmed:
15
3
2022
medline:
15
3
2022
Statut:
epublish
Résumé
Understanding and visualizing the heterogeneous structure of immiscible semicrystalline polymer systems is critical for optimizing their morphology and microstructure. We demonstrate a cryogenic 4D-STEM technique using a combination of amorphous radial profile mapping and correlative crystalline growth processing methods to map both the crystalline and amorphous phase distribution in an isotactic polypropylene (iPP)/ethylene-octene copolymer (EO) multilayer film with 5-nm step size. The resulting map shows a very sharp interface between the amorphous iPP and EO with no preferential crystalline structure near or at the interface, reinforcing the expected incompatibility and immiscibility of iPP and EO, which is a short-chain branched polyethylene. This technique provides a method for direct observation of interfacial structure in an unstained semicrystalline complex multicomponent system with a single cryogenic 4D-STEM dataset.
Identifiants
pubmed: 35281728
doi: 10.1016/j.isci.2022.103882
pii: S2589-0042(22)00152-3
pmc: PMC8914558
doi:
Types de publication
Journal Article
Langues
eng
Pagination
103882Informations de copyright
© 2022 The Authors.
Déclaration de conflit d'intérêts
The authors declare no competing interests
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