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Titolo:
SENSITIVITY OF IN-LINE RHEOMETRY FOR EXTRUSION OF MG(OH)(2) FILLED LDPE COMPOUNDS
Autore:
COATES PD; ROSE RM; WOODHEAD M; KELLY AL;
Indirizzi:
UNIV BRADFORD,IRC POLYMER SCI & TECHNOL MECH & MED ENGN BRADFORD BD7 1DP W YORKSHIRE ENGLAND
Titolo Testata:
International polymer processing
fascicolo: 2, volume: 13, anno: 1998,
pagine: 172 - 182
SICI:
0930-777X(1998)13:2<172:SOIRFE>2.0.ZU;2-B
Fonte:
ISI
Lingua:
ENG
Soggetto:
MOLTEN POLYMERS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
15
Recensione:
Indirizzi per estratti:
Citazione:
P.D. Coates et al., "SENSITIVITY OF IN-LINE RHEOMETRY FOR EXTRUSION OF MG(OH)(2) FILLED LDPE COMPOUNDS", International polymer processing, 13(2), 1998, pp. 172-182

Abstract

In-process and off-line rheometry studies are reported for compounds based on Mg(OH)(2) filled low density polyethylene, some of which werefirst subjected to a range of strain histories in typical compoundingoperations. In the study reported here, the compounds were processed using an instrumented, computer monitored single screw extruder in theIRC laboratories, fitted with in line rheometers (ILR). In initial experiments a four sensor ILR slit die was used for the in-process shearrheometry, and a Rosand RH7 twin bore capillary rheometer for off-line shear and entry pressure measurements. Off line and in-line results are compared, showing good agreement for shear. Estimates have been obtained for the sensitivity to filler loading of the off line rheometer(shear flow and entry pressure measurements), and the 4 sensor ILR (shear flow measurements), which indicate that the ILR offers similar resolution of filler level to the off line rheometer at the higher loadings, although the ILR appears to have much lower sensitivity at highershear rates at lower loadings, an effect which appears to be related to processing effects on the rheology of the compound rather than the measurement ability of the ILR. The ILR was also able to discriminate between samples with differing processing histories, Results from a sh-sensor ILR die have shown good agreement in shear flow measurements, and have added the ability to measure entry pressures, which are compared with off-line measurements.

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Documento generato il 28/11/20 alle ore 04:22:15