Discussion on the peculiar behavior of polyolefins filled with nano-sized silica
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26310%2F07%3APU71411" target="_blank" >RIV/00216305:26310/07:PU71411 - isvavai.cz</a>
Result on the web
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DOI - Digital Object Identifier
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Alternative languages
Result language
angličtina
Original language name
Discussion on the peculiar behavior of polyolefins filled with nano-sized silica
Original language description
Effect of silica nano-filler on the deformation response and morphology of low- and high-density polyethylene (HDPE, LDPE) and isotactic polypropylene (PP) modified with fumed silica was investigated. The dynamic-mechanical thermal spectroscopy, differential scanning calorimetry, optical microscopy and density measurements were carried out to determine the temperature dependence of storage and loss moduli as well as nanocomposite morphology. It was demonstrated that the degree of matrix reinforcement isconsiderably affected by the extent of matrix crystallinity, especially, in the temperature range from (Tm-130C) to Tm. Based on experimental evidence and literature review; it is proposed that this phenomenon may be attributed to the alpha mechanical relaxation process occurring above matrix Tg. As a result of adding silica into the melted matrix, mobility of chains in contact with silica particles became reduced. This caused substantial changes in morphology of these semicrystalline n
Czech name
Neobvyklé vlastnosti polyolefinů plněných nano-silikou
Czech description
Byl studován vliv nano-siliky na deformační chování a morfologii LDPE, HDPE a PP. Bylo zjištěno, že nanoplnivo výrazně ovlivňuje mechanicko-relaxační chování polyolefinů v závislosti na obsahu krystalické fáze. Zároveň, nanoplnivo výrazně modifikovalo krystalickou strukturu studovaných polyolefinů. Na základě provedených testů se pozorované jevy zdají být následkem segmentální immobilizace polymerních řetězců na povrchu nanoplniva.
Classification
Type
D - Article in proceedings
CEP classification
CD - Macromolecular chemistry
OECD FORD branch
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Result continuities
Project
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Continuities
Z - Vyzkumny zamer (s odkazem do CEZ)
Others
Publication year
2007
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Article name in the collection
CD: Main topic: Polyolefin Composites for special purposes (micro-fillers, fire-resistant, conductive etc.)
ISBN
978-80-214-3495-0
ISSN
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e-ISSN
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Number of pages
16
Pages from-to
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Publisher name
-
Place of publication
Brno
Event location
Brno
Event date
Sep 11, 2007
Type of event by nationality
CST - Celostátní akce
UT code for WoS article
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