| Titre : |
Water-compatible, pH-sensitive, colour-changing polyurethane with low-temperature flexibility |
| Type de document : |
texte imprimé |
| Auteurs : |
Yong-Chan Chung, Auteur ; In-Hong Jung, Auteur ; Byoung Chul Chun, Auteur |
| Année de publication : |
2017 |
| Article en page(s) : |
p. 252 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Catégories : |
Analyse thermique
Basses températures
Compatibilité chimique et physique
Eau
Effet mémoire de forme
Fibres textiles -- Propriétés mécaniques
Greffage (chimie)
pH
Polymères -- Synthèse
Polyuréthanes
Propionique diméthylol, Acide
Stabilité thermique
|
| Index. décimale : |
667.3 Teinture et impression des tissus |
| Résumé : |
A pH indicator (Bromocresol Green, Bromocresol Purple, or Thymol Blue) is grafted onto polyurethane (PU) using 2,2-dimethylolpropanoic acid (DMPA) to enhance water compatibility. The indicator-grafted, water-compatible PU is analysed for soft-segment thermal, tensile, and shape recovery properties, fast colour change depending on various pH conditions, and low-temperature flexibility. The PU surface becomes water compatible as DMPA content increases, and the characteristic UV-vis absorbance is observed for each grafted indicator. The PU series exhibits a sharp increase in tensile stress and crosslink density at low DMPA content, but a decrease with increased DMPA content. The glass transition temperature increases significantly with increased DMPA content. Shape recovery remains high, but shape retention sharply decreases after an indicator is grafted. The grafting of pH indicator onto PU improves the low-temperature flexibility and imparts an immediate colour change according to the solution pH and grafted indicator. |
| Note de contenu : |
- EXPERIMENTAL : Materials - Polymer synthesis - Characterisation - Shape memory and low-temperature flexibility test
- RESULTS AND DISCUSSION : Synthesis and structure of PU - IR and thermal analysis - Crosslink density and tensile mechanical properties - Shape memory effect - pH indication and low-temperature stability |
| DOI : |
10.1111/cote.12275 |
| En ligne : |
https://drive.google.com/file/d/1E7GPPiFYnqxU63YQvN_p0piCEs65Clvb/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28649 |
in COLORATION TECHNOLOGY > Vol. 133, N° 3 (06/2017) . - p. 252
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Water-compatible, pH-sensitive, colour-changing polyurethane with low-temperature flexibility in COLORATION TECHNOLOGY, Vol. 133, N° 3 (06/2017)
