Sorption of vapors in methanol soaked and in thermally annealed Matrimid® films

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F23%3A43927106" target="_blank" >RIV/60461373:22310/23:43927106 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/60461373:22340/23:43927106

Výsledek na webu

<a href="https://doi.org/10.1002/app.54629" target="_blank" >https://doi.org/10.1002/app.54629</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1002/app.54629" target="_blank" >10.1002/app.54629</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Sorption of vapors in methanol soaked and in thermally annealed Matrimid® films

Popis výsledku v původním jazyce

Matrimid® shows well separated sub-glass transitions and substantial entrapmentof dichloromethane (DCM) in the solution-cast films. The entrapped DCM wasremoved by soaking the polymer in the excess of liquid methanol followed eitherby thermal annealing (vacuum at 200°C) or by the desorption at mild conditions.These physical treatments influenced the sorption kinetics and even the sorptionisotherms for vapors of DCM, methanol (MeOH) and acetonitrile (MeCN) at35.0C. The sorption isotherms for the thermally annealed Matrimid® wereshifted to those for the methanol-soaked Matrimid® upon its exposure to sufficientlysaturated vapors. The physical treatments changed the β sub-glass transitionof the polymer, and did not cause changes in the chemical composition andmicrostructure as sensed using ATR-FTIR and SEM, respectively. Relaxation ofthe annealed Matrimid® was achieved by its soaking in liquid MeOH and by theexposure to vapors, their threshold saturation followed the same order as diffusivity:MeOH &gt; MeCN &gt; DCM. Although methanol appears the least effective agentto induce the relaxation of Matrimid®, it diffuses in and desorbs from the polymerreadily. Liquid MeOH and its vapor thus appear the media of choice for causingthe relaxation and removal of entrapped solvents from Matrimid®.

Název v anglickém jazyce

Sorption of vapors in methanol soaked and in thermally annealed Matrimid® films

Popis výsledku anglicky

Matrimid® shows well separated sub-glass transitions and substantial entrapmentof dichloromethane (DCM) in the solution-cast films. The entrapped DCM wasremoved by soaking the polymer in the excess of liquid methanol followed eitherby thermal annealing (vacuum at 200°C) or by the desorption at mild conditions.These physical treatments influenced the sorption kinetics and even the sorptionisotherms for vapors of DCM, methanol (MeOH) and acetonitrile (MeCN) at35.0C. The sorption isotherms for the thermally annealed Matrimid® wereshifted to those for the methanol-soaked Matrimid® upon its exposure to sufficientlysaturated vapors. The physical treatments changed the β sub-glass transitionof the polymer, and did not cause changes in the chemical composition andmicrostructure as sensed using ATR-FTIR and SEM, respectively. Relaxation ofthe annealed Matrimid® was achieved by its soaking in liquid MeOH and by theexposure to vapors, their threshold saturation followed the same order as diffusivity:MeOH &gt; MeCN &gt; DCM. Although methanol appears the least effective agentto induce the relaxation of Matrimid®, it diffuses in and desorbs from the polymerreadily. Liquid MeOH and its vapor thus appear the media of choice for causingthe relaxation and removal of entrapped solvents from Matrimid®.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10404 - Polymer science

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2023

Kód důvěrnosti údajů

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

Název periodika

Journal of Applied Polymer Science

ISSN

0021-8995

e-ISSN

1097-4628

Svazek periodika

140

Číslo periodika v rámci svazku

44

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

10

Strana od-do

"e54629"

Kód UT WoS článku

001104896700009

EID výsledku v databázi Scopus

2-s2.0-85169169313