Effect of Nanoparticle Organization on Molecular Mobility and Mechanical Properties of Polymer Nanocomposites

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26620%2F19%3APU133233" target="_blank" >RIV/00216305:26620/19:PU133233 - isvavai.cz</a>

Výsledek na webu

<a href="https://pubs.acs.org/doi/10.1021/acs.macromol.9b01197" target="_blank" >https://pubs.acs.org/doi/10.1021/acs.macromol.9b01197</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1021/acs.macromol.9b01197" target="_blank" >10.1021/acs.macromol.9b01197</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Effect of Nanoparticle Organization on Molecular Mobility and Mechanical Properties of Polymer Nanocomposites

Popis výsledku v původním jazyce

Influence of nanoparticle (NP) spatial organization on relaxation and mechanical properties of polymer nanocomposites (PNCs) was investigated. For the first time, the properties of PNCs with various nanostructures at the constant chemical composition were related to their experimentally determined structural parameters—effective interfacial surface and interparticle distance. Segmental scale reinforcement active below and above glass transition was attributed to the immobilization and frustration of polymer segments caused by attractive polymer–particle interactions. A novel reinforcing mechanism of chain bound clusters related to their internal structure was revealed while negligible reinforcement from NP–NP interactions of contact aggregates was found. The mechanical response of PNCs was correlated with appropriate relaxation properties. It provided the first experimental proof that deformation yielding dynamics of PNCs is controlled by glass transition segmental mobility. Main features of various NP spatial organizations were characterized. Chain bound clusters showed the most significant reinforcement above the glass transition temperature (Tg). Moreover, the hierarchical nature of chain bound clusters caused broadening of the ductile response compared to other nanostructures and also to the neat matrix. The most pronounced enhancement of elastic modulus, yield stress, and creep durability was found for individually dispersed NPs. The acquired nanostructure–property relationships will provide a foundation for the future design of hierarchic and multidomain nanocomposites.

Název v anglickém jazyce

Effect of Nanoparticle Organization on Molecular Mobility and Mechanical Properties of Polymer Nanocomposites

Popis výsledku anglicky

Influence of nanoparticle (NP) spatial organization on relaxation and mechanical properties of polymer nanocomposites (PNCs) was investigated. For the first time, the properties of PNCs with various nanostructures at the constant chemical composition were related to their experimentally determined structural parameters—effective interfacial surface and interparticle distance. Segmental scale reinforcement active below and above glass transition was attributed to the immobilization and frustration of polymer segments caused by attractive polymer–particle interactions. A novel reinforcing mechanism of chain bound clusters related to their internal structure was revealed while negligible reinforcement from NP–NP interactions of contact aggregates was found. The mechanical response of PNCs was correlated with appropriate relaxation properties. It provided the first experimental proof that deformation yielding dynamics of PNCs is controlled by glass transition segmental mobility. Main features of various NP spatial organizations were characterized. Chain bound clusters showed the most significant reinforcement above the glass transition temperature (Tg). Moreover, the hierarchical nature of chain bound clusters caused broadening of the ductile response compared to other nanostructures and also to the neat matrix. The most pronounced enhancement of elastic modulus, yield stress, and creep durability was found for individually dispersed NPs. The acquired nanostructure–property relationships will provide a foundation for the future design of hierarchic and multidomain nanocomposites.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10404 - Polymer science

Projekt

<a href="/cs/project/GA18-17540S" target="_blank" >GA18-17540S: Nízkohustotní funkční nanokompozity</a><br>

Návaznosti

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

Rok uplatnění

2019

Kód důvěrnosti údajů

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

Název periodika

MACROMOLECULES

ISSN

0024-9297

e-ISSN

1520-5835

Svazek periodika

52

Číslo periodika v rámci svazku

16

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

10

Strana od-do

6250-6259

Kód UT WoS článku

000483437500022

EID výsledku v databázi Scopus

2-s2.0-85071677391