Radiation softening and hardening of PDMS in combined neutron and γ rays

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F23%3A43924222" target="_blank" >RIV/60461373:22310/23:43924222 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/60461373:22340/23:43924222

Výsledek na webu

<a href="https://doi.org/10.1016/j.polymdegradstab.2022.110241" target="_blank" >https://doi.org/10.1016/j.polymdegradstab.2022.110241</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.polymdegradstab.2022.110241" target="_blank" >10.1016/j.polymdegradstab.2022.110241</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Radiation softening and hardening of PDMS in combined neutron and γ rays

Popis výsledku v původním jazyce

We report on the irradiation of a modified silica-filled room temperature vulcanized (RTV) PDMS. The irradiationexperiments were conducted in air with combined neutron (approx. 6⋅1012 n⋅cm???? 2⋅s???? 1 at energies 1 meV to1 MeV with an approximated maximum of 3% tail towards higher energy neutrons from 1 MeV up to 100 MeV)and γ rays (739–28,900 Gy at energies 0.01 MeV to 50 MeV) in the NAA position in the Swiss Spallation NeutronSource SINQ. Softening of the gel prevailed for the shorter exposures, hardening for the longer exposures withinthe explored range of exposure time (1.5 to 47 min). The material changes were sensed using dynamic mechanicalanalysis (DMA), analysis of the swelling in good solvents (o-, m-, p- xylene), Raman and FTIR spectroscopy,and water contact angle measurement. While the irradiation of PDMS influenced the swelling in thexylenes, melting temperature and elastic modulus, it did not discernibly influence the Raman and FTIR spectra,sol content, and water contact angle. Irradiation can be used as a post treatment of PDMS items enabling theoptimization of elastic modulus and swelling characteristics.

Název v anglickém jazyce

Radiation softening and hardening of PDMS in combined neutron and γ rays

Popis výsledku anglicky

We report on the irradiation of a modified silica-filled room temperature vulcanized (RTV) PDMS. The irradiationexperiments were conducted in air with combined neutron (approx. 6⋅1012 n⋅cm???? 2⋅s???? 1 at energies 1 meV to1 MeV with an approximated maximum of 3% tail towards higher energy neutrons from 1 MeV up to 100 MeV)and γ rays (739–28,900 Gy at energies 0.01 MeV to 50 MeV) in the NAA position in the Swiss Spallation NeutronSource SINQ. Softening of the gel prevailed for the shorter exposures, hardening for the longer exposures withinthe explored range of exposure time (1.5 to 47 min). The material changes were sensed using dynamic mechanicalanalysis (DMA), analysis of the swelling in good solvents (o-, m-, p- xylene), Raman and FTIR spectroscopy,and water contact angle measurement. While the irradiation of PDMS influenced the swelling in thexylenes, melting temperature and elastic modulus, it did not discernibly influence the Raman and FTIR spectra,sol content, and water contact angle. Irradiation can be used as a post treatment of PDMS items enabling theoptimization of elastic modulus and swelling characteristics.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10404 - Polymer science

Projekt

—

Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2023

Kód důvěrnosti údajů

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

Název periodika

Polymer Degradation and Stability

ISSN

0141-3910

e-ISSN

1873-2321

Svazek periodika

208

Číslo periodika v rámci svazku

February 2023

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

7

Strana od-do

110241

Kód UT WoS článku

000992425300001

EID výsledku v databázi Scopus

2-s2.0-85145260126