Structure and dynamics of irregular multiarm star polymers
Melt properties of highly branched star polymers consisting of a 1,2-polybutadiene core and nearly 270 arms of 1,4-polybutadiene with varying sizes have been investigated using small angle X-ray scattering (SAXS) and dynamic rheological measurements in the linear viscoelastic limit. Despite thei...
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| Datum: | 2002 |
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| Hauptverfasser: | , , |
| Format: | Artikel |
| Sprache: | English |
| Veröffentlicht: |
Інститут фізики конденсованих систем НАН України
2002
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| Schriftenreihe: | Condensed Matter Physics |
| Online Zugang: | http://dspace.nbuv.gov.ua/handle/123456789/120581 |
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| Назва журналу: | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| Zitieren: | Structure and dynamics of irregular multiarm star polymers / D. Vlassopoulos, T. Pakula, J. Roovers // Condensed Matter Physics. — 2002. — Т. 5, № 1(29). — С. 105-116. — Бібліогр.: 23 назв. — англ. |
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Digital Library of Periodicals of National Academy of Sciences of Ukraine| Zusammenfassung: | Melt properties of highly branched star polymers consisting of a 1,2-polybutadiene
core and nearly 270 arms of 1,4-polybutadiene with varying
sizes have been investigated using small angle X-ray scattering (SAXS)
and dynamic rheological measurements in the linear viscoelastic limit. Despite
their difference in internal structure compared to the regular stars with
128 arms and spherical dendritic core, these polymers exhibit the same
features: a liquid-like ordering resulting from their specific intramolecular
monomer density distribution. This leads to a dual terminal viscoelastic relaxation,
consisting of a fast arm relaxation and a slow structural relaxation
mechanisms. Both modes conform quantitatively to the generic behaviour
of multiarm star polymers, suggesting a universality of the behaviour of
highly branched macromolecular objects. |
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