| Titre : |
Synthesis and properties of nitrogen heterocycle-functionalized core-shell hyperbranched polyester |
| Type de document : |
texte imprimé |
| Auteurs : |
Subramanian Karpagam, Auteur ; S. Guhanathan, Auteur |
| Année de publication : |
2015 |
| Article en page(s) : |
p. 233-242 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Catégories : |
Analyse spectrale
Analyse thermique
Azote
Calorimétrie
Caractérisation
Composés hétérocycliques
Core-Shell
Diélectriques
Poids moléculaires
Polyesters
Polymères -- Propriétés électriques
Polymères -- Propriétés thermiques
Polymères -- Synthèse
Polymères ramifiés
Résonance magnétique nucléaire
Thermogravimétrie
|
| Index. décimale : |
668.4 Plastiques, vinyles |
| Résumé : |
Core-shell hyperbranched polyesters (HBPE) of third generation prepared from 2,2?-bis (hydroxymethyl) propionic acid (Bis-MPA) as an ABx monomer and N-heterocyclic (indole, piperidine and piperazine) phosphoryl dichloride as a core molecule by melt condensation process. These polymers were characterized by FT-IR, 1H NMR, 13C NMR, 31P NMR, elemental analysis, and MALDI spectroscopy. The thermal behavior of the polymers has been investigated by thermo gravimetric analysis (TGA) and differential scanning calorimetry (DSC). There is no weight loss observed until 250 °C under nitrogen atmosphere. DSC showed that the glass transition temperatures was about ?14 and ?30 °C for the prepared core-shell HBPE. The dielectric properties such as dielectric constant and loss factor for these polyesters were also studied with respect to change of frequency (50 Hz to 5 MHz). |
| Note de contenu : |
- EXPERIMENTAL : Materials - Methods - Measurements of dielectric properties - Synthesis of N-heterocyclic phosphoryl dichloride - Synthesis of phosphorous containing third generation (G3) of N-heterocyclic hyperbranched polyester (HBPE)
- RESULTS AND DISCUSSION : Synthesis of hyperbranched polyesters - Characterization of hyperbranched polyesters - Degree of branching - Molecular weight and molecular weight distribution - Electrical properties - Thermal properties |
| DOI : |
10.3139/217.2990 |
| En ligne : |
https://drive.google.com/file/d/1di8F6zbcE4a7EKMS620xoEVRSJ-DM_m2/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=23905 |
in INTERNATIONAL POLYMER PROCESSING > Vol. XXX, N° 2 (05/2015) . - p. 233-242
Aller sur edunet
Accueil
Synthesis and properties of nitrogen heterocycle-functionalized core-shell hyperbranched polyester in INTERNATIONAL POLYMER PROCESSING, Vol. XXX, N° 2 (05/2015)
