Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
Part I. On the physical characterization of ethene/propene/CO terpolymers:effect of composition
Autore:
Hollmann, F; Mansour, AA; Rieger, B;
Indirizzi:
Cairo Univ, Dept Chem, Orman Giza, Egypt Cairo Univ Orman Giza EgyptCairo Univ, Dept Chem, Orman Giza, Egypt Univ Ulm, Dept Inorgan Chem 2, Ulm, Germany Univ Ulm Ulm GermanyUniv Ulm, Dept Inorgan Chem 2, Ulm, Germany
Titolo Testata:
POLYMER
fascicolo: 1, volume: 42, anno: 2001,
pagine: 93 - 101
SICI:
0032-3861(200101)42:1<93:PIOTPC>2.0.ZU;2-A
Fonte:
ISI
Lingua:
ENG
Soggetto:
CATALYZED ALTERNATING COPOLYMERIZATION; CARBON-MONOXIDE; SCANNING CALORIMETERS; DIELECTRIC-RELAXATION; MECHANISTIC ASPECTS; ALPHA-OLEFINS; POLYMERS; TEMPERATURE; CALIBRATION; PROPENE;
Keywords:
ethene/propene/CO terpolymer; dielectric relaxation; polymerization;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
41
Recensione:
Indirizzi per estratti:
Indirizzo: Mansour, AA Cairo Univ, Dept Chem, POB 12613, Orman Giza, Egypt Cairo UnivPOB 12613 Orman Giza Egypt 613, Orman Giza, Egypt
Citazione:
F. Hollmann et al., "Part I. On the physical characterization of ethene/propene/CO terpolymers:effect of composition", POLYMER, 42(1), 2001, pp. 93-101

Abstract

A series of ethene/propene/CO terpolymers (PEPCO) with different ethene/CO(ECO) contents has been prepared and physically characterized. The ECO content varies between 0 and 80 wt%. Dielectric investigations have been carried out over wide ranges of frequency (10(-1)-10(6) Hz) and temperature (-65to 60 degrees C). In addition, differential scanning calorimetry (DSC) andstress-strain measurements have been done. The dielectric results showed that all samples exhibit three or more relaxations, namely; local, glass andhigh-temperature process. The relaxation strength of the local process is found to increase with increasing the ECO contents and is attributed to theECO blocks. DSC showed that the glass transition temperature decreases with increasing ECO content and varies between 3 and 23 degrees C. The composition dependence of the glass temperature, T-g, follows a Fox behavior. In addition, DSC measurements showed an endothermic process with multiple peaksin the range 30-150 degrees C. The heat of melting increases slightly withincreasing ECO content. The stress-strain behavior is similar to thermoplastic rubber for samples with ECO contents lower than 50 wt%. (C) 2000 Elsevier Science Ltd. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 12/07/20 alle ore 08:49:10