Stiffening and softening of freshly prepared and aged CTA, PTMSP, and PIM‑1 films exposed to volatile compounds

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F24%3A43927555" target="_blank" >RIV/60461373:22310/24:43927555 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/60461373:22340/24:43927555

Výsledek na webu

<a href="https://doi.org/10.1002/pol.20230776" target="_blank" >https://doi.org/10.1002/pol.20230776</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1002/pol.20230776" target="_blank" >10.1002/pol.20230776</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Stiffening and softening of freshly prepared and aged CTA, PTMSP, and PIM‑1 films exposed to volatile compounds

Popis výsledku v původním jazyce

Glassy polymers stiffen or soften when exposed to volatile compounds, depending on the specific combination of polymer-compound and the specimen history. Relevant to the long-term applicability of the separation membranes, three common membrane glassy polymers are studied in this work. Freshly prepared and 2-years aged films from cellulose triacetate (CTA), poly[1 (trimethylsilyl) 1 propyne] (PTMSP), and the archetypal polymer of intrinsic microporosity (PIM 1) were tested using isothermal Dynamic Mechanical Analysis (DMA) at varied vapor activity. Vapors of organic compounds, in which the polymers do and do not dissolve in the liquid phase (solvents and nonsolvents), were studied at 40 °C, namely: dichloromethane (DCM, solvent), p xylene (solvent for PTMSP and PIM 1), and methanol (nonsolvent). Functional groups of the mer units sensitive to the dissolution were identified using Raman spectroscopy. All aged films were stiffer than the freshly prepared ones. Stiffening prevailed for most freshly prepared film-vapor pairs at low vapor saturations (activity &lt; ≈0.4), except CTA and PIM 1 in nonsolvent methanol vapors. Softening prevailed for the aged films and higher vapor saturations (activity &gt; ≈0.6). Vapors of the solvents and nonsolvents did not show the expectable prevalence to softening and stiffening, respectively. Physical aging influenced the stiffening and softening of polymer glasses expectably.

Název v anglickém jazyce

Stiffening and softening of freshly prepared and aged CTA, PTMSP, and PIM‑1 films exposed to volatile compounds

Popis výsledku anglicky

Glassy polymers stiffen or soften when exposed to volatile compounds, depending on the specific combination of polymer-compound and the specimen history. Relevant to the long-term applicability of the separation membranes, three common membrane glassy polymers are studied in this work. Freshly prepared and 2-years aged films from cellulose triacetate (CTA), poly[1 (trimethylsilyl) 1 propyne] (PTMSP), and the archetypal polymer of intrinsic microporosity (PIM 1) were tested using isothermal Dynamic Mechanical Analysis (DMA) at varied vapor activity. Vapors of organic compounds, in which the polymers do and do not dissolve in the liquid phase (solvents and nonsolvents), were studied at 40 °C, namely: dichloromethane (DCM, solvent), p xylene (solvent for PTMSP and PIM 1), and methanol (nonsolvent). Functional groups of the mer units sensitive to the dissolution were identified using Raman spectroscopy. All aged films were stiffer than the freshly prepared ones. Stiffening prevailed for most freshly prepared film-vapor pairs at low vapor saturations (activity &lt; ≈0.4), except CTA and PIM 1 in nonsolvent methanol vapors. Softening prevailed for the aged films and higher vapor saturations (activity &gt; ≈0.6). Vapors of the solvents and nonsolvents did not show the expectable prevalence to softening and stiffening, respectively. Physical aging influenced the stiffening and softening of polymer glasses expectably.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10404 - Polymer science

Projekt

<a href="/cs/project/GA18-08389S" target="_blank" >GA18-08389S: Studium plastifikace polymerních membrán a termodynamiky multikomponentní sorpce pro zefektivnění membránových separačních procesů</a><br>

Návaznosti

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

Rok uplatnění

2024

Kód důvěrnosti údajů

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

Název periodika

JOURNAL OF POLYMER SCIENCE

ISSN

2642-4150

e-ISSN

2642-4169

Svazek periodika

62

Číslo periodika v rámci svazku

9

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

8

Strana od-do

1781-1788

Kód UT WoS článku

001142648700001

EID výsledku v databázi Scopus

2-s2.0-85182247064