Structural and thermoanalytical characterization of self-healing polymer the effect of cross-linking density /
The effect of the gradually formed cross-linked structure on the thermal properties and swelling behaviour of modified poly(vinyl alcohol) was investigated. To this aim, the semi-crystalline polymer was functionalized with aldehyde and amino moieties to produce polymers with dynamic imine cross-link...
Elmentve itt :
| Szerzők: | |
|---|---|
| Dokumentumtípus: | Cikk |
| Megjelent: |
2024
|
| Sorozat: | JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
149 No. 7 |
| Tárgyszavak: | |
| doi: | 10.1007/s10973-023-12862-2 |
| mtmt: | 34547597 |
| Online Access: | http://publicatio.bibl.u-szeged.hu/40274 |
| LEADER | 02424nab a2200265 i 4500 | ||
|---|---|---|---|
| 001 | publ40274 | ||
| 005 | 20260601132103.0 | ||
| 008 | 260601s2024 hu o 000 eng d | ||
| 022 | |a 1388-6150 | ||
| 024 | 7 | |a 10.1007/s10973-023-12862-2 |2 doi | |
| 024 | 7 | |a 34547597 |2 mtmt | |
| 040 | |a SZTE Publicatio Repozitórium |b hun | ||
| 041 | |a eng | ||
| 100 | 1 | |a Takács Tamás | |
| 245 | 1 | 0 | |a Structural and thermoanalytical characterization of self-healing polymer |h [elektronikus dokumentum] : |b the effect of cross-linking density / |c Takács Tamás |
| 260 | |c 2024 | ||
| 300 | |a 2765-2775 | ||
| 490 | 0 | |a JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY |v 149 No. 7 | |
| 520 | 3 | |a The effect of the gradually formed cross-linked structure on the thermal properties and swelling behaviour of modified poly(vinyl alcohol) was investigated. To this aim, the semi-crystalline polymer was functionalized with aldehyde and amino moieties to produce polymers with dynamic imine cross-links, and, thus, with self-healing or curing ability. With increasing degree of functionalization (0.89–7.12%), denser polymer networks cross-linked by dynamic imine bonds were formed, the samples systematically developed thermoset-like properties compared to the pristine, initially thermoplastic PVA. As a result, the introduction of new moieties into the initial PVA lowered the glass transition (from 65.3 to 35.0 °C) and melting temperatures (from 194 to 161 °C), however, a new peak (T crd ) with growing enthalpy values appeared on the DSC curves, which indicates that more and more energy must be supplied in order to break the imine cross-links formed between the introduced aldehyde and amino groups. The significant impact of the degree of functionalization and cross-linking density on the polymer structure was also clearly demonstrated: the crystallinity decreased as the abundance of the introduced moieties increased and the formation of cross-links proceeded. At the same time, the water desorption enthalpies of the samples increased, suggesting a stronger, chemically cross-linked thermoset-like polymer network compared to the thermoplastic poly(vinyl alcohol). | |
| 650 | 4 | |a Kémiai tudományok | |
| 700 | 0 | 1 | |a Abdelghafour Mohamed M. |e aut |
| 700 | 0 | 1 | |a Sebők Dániel |e aut |
| 700 | 0 | 1 | |a Kukovecz Ákos |e aut |
| 700 | 0 | 1 | |a Janovák László |e aut |
| 856 | 4 | 0 | |u http://publicatio.bibl.u-szeged.hu/40274/7/s10973-023-12862-2.pdf |z Dokumentum-elérés |