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Relaxation and crystal nucleation in polymer glasses

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dc.date.accessioned 2019-01-22T20:32:23Z
dc.date.available 2019-01-22T20:32:23Z
dc.date.issued 2018
dc.identifier.issn 0014-3057
dc.identifier.uri https://dspace.kpfu.ru/xmlui/handle/net/147618
dc.description.abstract © 2018 Elsevier Ltd Depending on the degree of undercooling, polymers crystallize from heterogeneous or homogeneous nuclei. The volume density of homogeneous nuclei at deep undercooling is often several orders of magnitude larger than that of heterogeneous nuclei; allowing crystallization even below the glass transition temperature. With the introduction of fast scanning chip calorimetry (FSC) detailed studies of nucleation and eventually crystallization at such low temperatures (deep undercooling) became possible. Homogeneous nucleation at temperatures below the glass transition shows an unexpected feature in regard to enthalpy relaxation occurring in the same temperature range. As a result of the often fast quench, the glass is initially in a high-enthalpy state causing enthalpy relaxation. Even if the mobility in the material is high, formation of overcritical nuclei is not immediately observed. Only after completion of the enthalpy relaxation, in other words, when the enthalpy of the supercooled liquid state is reached, homogeneous nucleation is observed. On the example of several polymers with different crystallization rates, we show that this behavior seems to be general.
dc.relation.ispartofseries European Polymer Journal
dc.subject Crystal nucleation
dc.subject Enthalpy relaxation
dc.subject Fast scanning chip calorimetry
dc.subject Polymer glass
dc.title Relaxation and crystal nucleation in polymer glasses
dc.type Article
dc.relation.ispartofseries-volume 102
dc.collection Публикации сотрудников КФУ
dc.relation.startpage 195
dc.source.id SCOPUS00143057-2018-102-SID85044452848


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  • Публикации сотрудников КФУ Scopus [24551]
    Коллекция содержит публикации сотрудников Казанского федерального (до 2010 года Казанского государственного) университета, проиндексированные в БД Scopus, начиная с 1970г.

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