Relations between morphology and micromechanical properties of alpha, beta and gamma phases of iPP

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389013%3A_____%2F18%3A00488784" target="_blank" >RIV/61389013:_____/18:00488784 - isvavai.cz</a>
Alternative codes found
RIV/68081731:_____/18:00488784
Result on the web
<a href="http://dx.doi.org/10.1016/j.polymertesting.2018.03.039" target="_blank" >http://dx.doi.org/10.1016/j.polymertesting.2018.03.039</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.polymertesting.2018.03.039" target="_blank" >10.1016/j.polymertesting.2018.03.039</a>

Result language
angličtina
Original language name
Relations between morphology and micromechanical properties of alpha, beta and gamma phases of iPP
Original language description
The relations between crystalline structure and micromechanical properties of alpha-, beta- and gamma-phase of isotactic polypropylene (iPP) were investigated. The iPP samples with various crystalline phase compositions were prepared by a controlled high-pressure crystallization that enabled us to obtain not only alpha-iPP and beta-iPP modifications, but also a series of almost pure gamma-iPP samples with gradually changing morphology, crystallinity and lamellar thickness. The micromechanical properties were assessed by instrumented microindentation hardness testing (MHI), from which we determined indentation hardness (HIT), indentation modulus (EIT), indentation creep (CIT) and elastic part of the indentation work (ηIT). It was demonstrated that gamma-iPP does not necessarily exhibit better mechanical performance than alpha- and beta-iPP, as suggested by some previous studies, because the final properties are strongly influenced not only by the phase composition (i.e. by the content of alpha-, beta- and gamma-phase), but also by the overall crystallinity.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10404 - Polymer science

Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2018
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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