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Titolo:
Structural effects of diacidic and glycolic moieties on physicochemical properties of aromatic polyesterdiols from glycolysis/esterification of poly(ethylene terephthalate) wastes
Autore:
Billiau-Loreau, M; Durand, G; Tersac, G;
Indirizzi:
Ecole Cent Paris, Lab Chim & Genie Procede, F-92295 Chatenay Malabry, France Ecole Cent Paris Chatenay Malabry France F-92295 hatenay Malabry, France
Titolo Testata:
POLYMER
fascicolo: 1, volume: 43, anno: 2002,
pagine: 21 - 28
SICI:
0032-3861(200201)43:1<21:SEODAG>2.0.ZU;2-F
Fonte:
ISI
Lingua:
ENG
Soggetto:
MULTIVARIATE DATA-ANALYSIS; PREDICTION; POLY(ETHYLENE-TEREPHTHALATE);
Keywords:
glycolysis; aromatic polyesterdiols; statistical analysis;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
25
Recensione:
Indirizzi per estratti:
Indirizzo: Tersac, G Ecole Cent Paris, Lab Chim & Genie Procede, Grade Voie Vignes, F-92295 Chatenay Malabry, France Ecole Cent Paris Grade Voie Vignes ChatenayMalabry France F-92295
Citazione:
M. Billiau-Loreau et al., "Structural effects of diacidic and glycolic moieties on physicochemical properties of aromatic polyesterdiols from glycolysis/esterification of poly(ethylene terephthalate) wastes", POLYMER, 43(1), 2002, pp. 21-28

Abstract

Useful polyols for rigid polyurethane foam manufacture may be obtained by glycolysis of post-consuming poly(ethylene terephthalate) (PET) wastes. Thephysicochemical properties of about 100 polyesterdiols were measured, the polyol molecular structure being built on three diacidic moieties and threeglycolic moieties in various proportions. Viscosity, foaming agent compatibility and storage stability are the most relevant physicochemical properties. Statistical analysis was made over more than 50 polyols. Molar ratios of the constitutive moieties to terephthalic residue were taken as composition parameter. From a Principal Component Analysis (PCA) it was found that 141bcompatibility is of opposite viscosity and independent of polyol storage stability, the properties being governed essentially by the glycolic moieties. Multiple regressions gave prediction equations for viscosity and 141b compatibility as a function of moieties amounts. The own effect of each structural unit was also investigated through some more homogeneous panels of polyols. Lack of storage stability appears when the proportions of constitutive PET units in glycolic and acidic moieties overcome critical values. The viscosity of the polyols. increases greatly with decreasing hydroxyl value or increasing the proportion of aromatic diacidic residues. (C) 2001 Elsevier Science Ltd. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 29/03/20 alle ore 08:59:53