Morphology, micromechanical, and macromechanical properties of novel waterborne poly(urethane-urea)/silica nanocomposites

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389013%3A_____%2F23%3A00568974" target="_blank" >RIV/61389013:_____/23:00568974 - isvavai.cz</a>

Result on the web

<a href="https://www.mdpi.com/1996-1944/16/5/1767" target="_blank" >https://www.mdpi.com/1996-1944/16/5/1767</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3390/ma16051767" target="_blank" >10.3390/ma16051767</a>

Result language

angličtina

Original language name

Morphology, micromechanical, and macromechanical properties of novel waterborne poly(urethane-urea)/silica nanocomposites

Original language description

Morphology, macro-, and micromechanical properties of novel poly(urethane-urea)/silica nanocomposites were analyzed by electron microscopy, dynamic mechanical thermal analysis, and microindentation. The studied nanocomposites were based on a poly(urethane-urea) (PUU) matrix filled by nanosilica, and were prepared from waterborne dispersions of PUU (latex) and SiO2. The loading of nano-SiO2 was varied between 0 (neat matrix) and 40 wt% in the dry nanocomposite. The prepared materials were all formally in the rubbery state at room temperature, but they displayed complex elastoviscoplastic behavior, spanning from stiffer elastomeric type to semi-glassy. Because of the employed rigid and highly uniform spherical nanofiller, the materials are of great interest for model microindentation studies. Additionally, because of the polycarbonate-type elastic chains of the PUU matrix, hydrogen bonding in the studied nanocomposites was expected to be rich and diverse, ranging from very strong to weak. In micro- and macromechanical tests, all the elasticity-related properties correlated very strongly. The relations among the properties that related to energy dissipation were complex, and were highly affected by the existence of hydrogen bonding of broadly varied strength, by the distribution patterns of the fine nanofiller, as well as by the eventual locally endured larger deformations during the tests, and the tendency of the materials to cold flow.

Czech name

—

Czech description

—

Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10404 - Polymer science

Project

<a href="/en/project/NU21-06-00084" target="_blank" >NU21-06-00084: Influence of UHMWPE type of polyethylene on the lifetime of knee replacements and relationship with the implant surfaces design</a><br>

Continuities

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

Publication year

2023

Confidentiality

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

Name of the periodical

Materials

ISSN

1996-1944

e-ISSN

1996-1944

Volume of the periodical

16

Issue of the periodical within the volume

5

Country of publishing house

CH - SWITZERLAND

Number of pages

26

Pages from-to

1767

UT code for WoS article

000946949300001

EID of the result in the Scopus database

2-s2.0-85149875779