[article]
| Titre : |
Poly(ethylene-co-butylene)-b-(styrene-ranmaleic anhydride)2 compatibilizers via nitroxide mediated radical polymerization |
| Type de document : |
texte imprimé |
| Auteurs : |
B. Lessard, Auteur ; C. Aumand-Bourque, Auteur ; R. Chaudury, Auteur ; D. Gomez, Auteur ; A. Haroon, Auteur ; N. Ibrahimian, Auteur ; S. Mackay, Auteur ; M.-C. Noel, Auteur ; R. Patel, Auteur ; S. Sitaram, Auteur ; S. Valla, Auteur ; B. White, Auteur ; M. Maric, Auteur |
| Année de publication : |
2011 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Catégories : |
Alliages polymères
Chromatographie sur gel
Copolymères séquencés
Copolymérisation
nitroxydes
Polyaddition
Polyamide 6
Polyéthylène-co-butylène
Polymères téléchéliques
Terpolymère styrène anhydride maléïque
|
| Index. décimale : |
668.9 Polymères |
| Résumé : |
Telechelic poly(ethylene-ran-butylene) initiator terminated with [tert-butyl[1-(diethoxyphosphoryl)-2,2-dimethylpropyl]amino] nitroxide groups (PEB-(SG1)2) was used to initiate the controlled radical copolymerization of maleic anhydride (MA) and styrene (ST). The ST/MA copolymerizations were performed in 1,4-dioxane at 110 °C and resulted in PEB-b-P(ST-ran-MA)2triblock copolymers with relatively narrow molecular weight distributions (¯Mm/¯Mn≈ 1.5). Gel permeation chromatography (GPC) indicated that the initiator used was ≈ 93% efficient. The resulting copolymers were then blended as 20 wt.% dispersions in nylon 6 (PA6) at 230 °C. With as little as 10 mol.% of MA in the feed to make the PEB-b-P(ST-ran-MA)2, blends were deemed dynamically compatibilized based on the reduced particle size. All of the PEB-b-P(ST-ran-MA)2/PA6 blends resulted in a minor phase particle size ¯DVS = 0.1 μm while the PEB-b-P(ST)/PA6 blend had ¯DVS = 1.15 μm (i. e. no MA in the copolymer). Tensile testing revealed yield stresses and strains decreased steadily from pure PA6 to non-reactive PEB-b-P(ST)2/PA6 to PEB-b-P(STran-MA)2/PA6. However, no difference in tensile properties was observed between PEB-b-P(ST-ran-MA)2/PA6 samples made from PEB-b-P(ST-ran-MA)2copolymer of varying MA content. |
| DOI : |
10.3139/217.2425 |
| En ligne : |
https://drive.google.com/file/d/13v9vmCkrl8CmEdNzpQRsOLpMfIhFyUkW/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=11523 |
in INTERNATIONAL POLYMER PROCESSING > Vol. XXVI, N° 2 (05/2011)
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Poly(ethylene-co-butylene)-b-(styrene-ranmaleic anhydride)2 compatibilizers via nitroxide mediated radical polymerization in INTERNATIONAL POLYMER PROCESSING, Vol. XXVI, N° 2 (05/2011)
