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

Kód výsledku v 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>

Nalezeny alternativní kódy

RIV/68081731:_____/18:00488784

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

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

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10404 - Polymer science

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2018

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Polymer Testing

ISSN

0142-9418

e-ISSN

—

Svazek periodika

67

Číslo periodika v rámci svazku

May

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

11

Strana od-do

522-532

Kód UT WoS článku

000432644900062

EID výsledku v databázi Scopus

2-s2.0-85044586277