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...
Збережено в:
| Дата: | 2002 |
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| Автори: | , , |
| Формат: | Стаття |
| Мова: | English |
| Опубліковано: |
Інститут фізики конденсованих систем НАН України
2002
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| Назва видання: | Condensed Matter Physics |
| Онлайн доступ: | http://dspace.nbuv.gov.ua/handle/123456789/120581 |
| Теги: |
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| Назва журналу: | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| Цитувати: | 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. |
Репозитарії
Digital Library of Periodicals of National Academy of Sciences of Ukraine| Резюме: | 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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