| Titre : |
Polyurethane urea dispersions with better balance of properties : Polyester and polycarbonate soft segments enhance crystallinity, viscoelasticity, ageing and hydrolytic resistance of PUU films |
| Type de document : |
texte imprimé |
| Auteurs : |
Monica Fuensanta, Auteur ; José Miguel Martin-Martinez, Auteur ; Francisco Rodriguez-Llansola, Auteur ; Victor Costa, Auteur ; Manuel Colera, Auteur |
| Année de publication : |
2019 |
| Article en page(s) : |
p. 108-115 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Catégories : |
Adhésion
Caoutchouc styrène-butadiène
Copolymère uréthane-urée
Copolymères -- Synthèse
Essais de pelage
Polycarbonates
Polyesters
Résistance à l'hydrolyse
Revêtements en phase aqueuse
Test d'immersion
Thermogravimétrie
Viscoélasticité
|
| Index. décimale : |
667.9 Revêtements et enduits |
| Résumé : |
Environmental regulations are driving the rapid growth of water-borne polyurethane urea dispersions (WPUUs) have good film-forming abilities at low temperatures and the resulting polyurethane urea (PUU) coatings show high flexibility, good chemical resistance and good adhesion to various substrates. |
| Note de contenu : |
- Preparatory work
- Characterisation of PUU films containing polyester and polycarbonate soft segments
- Adhesion before and after accelerated ageing of joints made with W)PAD+PCD) and WPAD°WPCD dispersions
- Ageing of PUU films containing polyester and polycarbonate soft segments
- Fig. 1 : General scheme of the synthesis procedure of WPUUs and PUUs made with mixture of polyols
- Fig. 2a : Variation of derivative of the weight as function of temperature for FPad and FPCD films
- Fig. 2b : Variation of derivative of the weight as function of temperature for films made with mixtures of polyols and with WPad+WPCD blends
- Fig. 3 : X-ray diffractograms of FPad and FPCD films
- Fig. 4a : Variation of storage modulus (G') as function of temperature for FPad and FPCD films
- Fig. 4b : Variation of storage modulus (G') as a function of temperature for PUUs made with mixtures of polyols and with WPad+WPCD blends
- Fig. 5 : T-peel strength of surface treated vulcanized SBR rubber/WPUU+5 wt% hardener/roughned leather joints as a function of the immersion time in water at 70°C. Locus of failure : CS, cohesive failure of the rubber ; CA, cohesive failure of the adhesive ; M, mixed failure (CS°CA)
- Fig. 6 : Photos of PUU films after immersion in water at 70°C for 3 days
- Fig. 7 : ATR-IR spectra of FPad and FPCD films before and after immersion in water at 70°C for 3 days
- Fig. 8 : Variation of derivative of the weight as a function of temperature for FPad and FPCD films before and after immersion in water at 70°C for 3 days. TGA experiments |
| En ligne : |
https://drive.google.com/file/d/1ai4tQ4v1i_caWcS5wljcTjwGAg1id-ji/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31687 |
in EUROPEAN COATINGS JOURNAL (ECJ) > N° 2 (02/2019) . - p. 108-115
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