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Titolo:
Gas absorption with filled polymer systems
Autore:
Chen, L; Sheth, H; Kim, R;
Indirizzi:
Trexel Inc, Woburn, MA 01801 USA Trexel Inc Woburn MA USA 01801Trexel Inc, Woburn, MA 01801 USA
Titolo Testata:
POLYMER ENGINEERING AND SCIENCE
fascicolo: 6, volume: 41, anno: 2001,
pagine: 990 - 997
SICI:
0032-3888(200106)41:6<990:GAWFPS>2.0.ZU;2-U
Fonte:
ISI
Lingua:
ENG
Soggetto:
GLASS-TRANSITION PARTICLES; HETEROGENEOUS NUCLEATION; MICROVOIDS; SURVIVAL;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Engineering, Computing & Technology
Citazioni:
10
Recensione:
Indirizzi per estratti:
Indirizzo: Chen, L Trexel Inc, 45 6th Rd, Woburn, MA 01801 USA Trexel Inc 45 6th Rd Woburn MA USA 01801 Rd, Woburn, MA 01801 USA
Citazione:
L. Chen et al., "Gas absorption with filled polymer systems", POLYM ENG S, 41(6), 2001, pp. 990-997

Abstract

This paper deals with the gas absorption behavior of polymer systems. The emphasis is on the difference between filled and unfilled polymers to explain heterogeneous nucleation in filled polymers. A Foaming Process Simulatorhas been built to study the gas absorption. It consists of a test chamber that holds the polymer samples. The chamber can be pressurized with gas up to 5000 psi and heated up to 450 degreesF. The gas pressure is monitored bya high-accuracy pressure transducer and recorded by a data acquisition system. The amount of gas absorbed by a polymer is determined from the pressure change in the test chamber. A rotor applies shear to the polymer melt to investigate the shear effects. Two polymer systems were tested: HDPE with/without talc, and PVC with/without calcium carbonate. The fillers were well dispersed as verified with scanning electron microscope. The tests were done at the melt temperatures from 120 degreesC to 177 degreesC and a saturation pressure of about 18.9 MPa. It was found that the filled polymers absorbmore gas compared to the unfilled ones. It is suggested that there is a certain amount of gas accumulated in the filler-polymer interface. This accumulated gas helps to create cells during the foaming process.

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Documento generato il 13/07/20 alle ore 07:17:20