Linked Life Data

21267706

Source:http://linkedlifedata.com/resource/pubmed/id/21267706

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
1
pubmed:dateCreated
2011-1-26
pubmed:abstractText
We have found very slow crystallization in thin films of cylinder-forming poly(isoprene-b-ethyleneoxide) (P(I-b -EO)) diblock copolymers with PEO being the minority block. The film was crystallized at room temperature after melting at 62 °C. Imaging methods were combined with X-ray reflectometry and grazing-incidence small-angle X-ray scattering and diffraction. Initially, hexagonally packed, amorphous PEO cylinders lie in the film plane. After 148 days, crystallized, finger-like terraces were observed over the entire film surface. The terrace height is 20% higher than the repeat distance in the as-prepared film. Thus, at the film surface, the cylinders have been destroyed by crystalline lamellae lying in the film plane. The PEO chain stems are perpendicular to the substrate surface and are once-folded and fully interdigitated. The substrate-near layers still consist of the hexagonally packed, amorphous PEO cylinders within the PI matrix.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Jan
pubmed:issn
1292-895X
pubmed:author
pubmed:issnType
Electronic
pubmed:volume
34
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
1-8
pubmed:meshHeading
pubmed:year
2011
pubmed:articleTitle
Surface-induced breakout crystallization in cylinder-forming P(I-b-EO) diblock copolymer thin films.
pubmed:affiliation
Technische Universität München, Physikdepartment, Fachgebiet Physik weicher Materie/Lehrstuhl für funktionelle Materialien, James-Franck-Str. 1, 85747 Garching, Germany. papadakis@tum.de
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't