On merging DMA and microindentation to determine local mechanical properties of polymers

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F70883521%3A28110%2F18%3A63520424" target="_blank" >RIV/70883521:28110/18:63520424 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/70883521:28610/18:63520424

Výsledek na webu

<a href="http://dx.doi.org/10.1016/j.polymertesting.2018.04.020" target="_blank" >http://dx.doi.org/10.1016/j.polymertesting.2018.04.020</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.polymertesting.2018.04.020" target="_blank" >10.1016/j.polymertesting.2018.04.020</a>

Jazyk výsledku

angličtina

Název v původním jazyce

On merging DMA and microindentation to determine local mechanical properties of polymers

Popis výsledku v původním jazyce

Micro- and nanoindentation and Dynamic Mechanical Analysis (DMA) are different methods to determine mechanical and viscoelastic material properties. The aim of this study was to broaden the capabilities of their utilization by merging these methods. Three standard diamond indenters and a tungsten needle were implemented in a conventional DMA. Four types of standard polymers were investigated. Quasi-static microindentation was performed to determine local material static stiffness, and dynamic microindentation was performed to evaluate local material complex modulus. The results of the quasi-static microindentation showed that different static stiffnesses of the polymers can be distinguished. Even the smallest differences in local mechanical properties due to processing and annealing were distinguished. The complex moduli determined by dynamic microindentation were in good agreement with literature values and three-point bending results. It was shown that a conventional DMA is suitable to determine local and bulk mechanical viscoelastic material properties within one instrument.

Název v anglickém jazyce

On merging DMA and microindentation to determine local mechanical properties of polymers

Popis výsledku anglicky

Micro- and nanoindentation and Dynamic Mechanical Analysis (DMA) are different methods to determine mechanical and viscoelastic material properties. The aim of this study was to broaden the capabilities of their utilization by merging these methods. Three standard diamond indenters and a tungsten needle were implemented in a conventional DMA. Four types of standard polymers were investigated. Quasi-static microindentation was performed to determine local material static stiffness, and dynamic microindentation was performed to evaluate local material complex modulus. The results of the quasi-static microindentation showed that different static stiffnesses of the polymers can be distinguished. Even the smallest differences in local mechanical properties due to processing and annealing were distinguished. The complex moduli determined by dynamic microindentation were in good agreement with literature values and three-point bending results. It was shown that a conventional DMA is suitable to determine local and bulk mechanical viscoelastic material properties within one instrument.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20501 - Materials engineering

Projekt

<a href="/cs/project/LO1504" target="_blank" >LO1504: Centrum polymerních systémů plus</a><br>

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

68

Číslo periodika v rámci svazku

Neuveden

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

6

Strana od-do

359-364

Kód UT WoS článku

000437076000044

EID výsledku v databázi Scopus

2-s2.0-85046344384