DEVOLATILIZATION OF ETHYLENE/ALPHA-OLEFIN COPOLYMER PELLETS

DEVOLATILIZATION OF ETHYLENE/ALPHA-OLEFIN COPOLYMER PELLETS

Pellets of ethylene/a-olefin copolymer are devolatilized using nitrogen in a devolatilization bin via a multistep process. Said multistep process, among other things, comprises providing nitrogen gas to the devolatilization bin at a first nitrogen inlet temperature (I) less than VICAT softening temp...

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Hauptverfasser: PIRES FORTES FERREIRA, Marcia, RAHIMI, Mehrnaz, NOORJAHAN, Abolfazl, SADEGHI, Soheil
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Sprache:eng ; fre ; ger
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CHEMISTRY
COMPOSITIONS BASED THEREON
MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS
METALLURGY
ORGANIC MACROMOLECULAR COMPOUNDS
THEIR PREPARATION OR CHEMICAL WORKING-UP
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creator PIRES FORTES FERREIRA, Marcia
RAHIMI, Mehrnaz
NOORJAHAN, Abolfazl
SADEGHI, Soheil
description Pellets of ethylene/a-olefin copolymer are devolatilized using nitrogen in a devolatilization bin via a multistep process. Said multistep process, among other things, comprises providing nitrogen gas to the devolatilization bin at a first nitrogen inlet temperature (I) less than VICAT softening temperature of the ethylene/α-olefin copolymer for a first period of time t 1 to form a new peak melting peak (II) greater than (I) and smaller than a highest peak melting temperature Tm of the ethylene/α-olefin copolymer. The devolatilization process is continued by raising and holding the nitrogen gas temperature provided to said devolatilization bin at a second nitrogen inlet temperature (III) for a second period of time t2 subsequent to the first period of time t1, wherein (III) is greater than (I) and less than (II).
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subjects CHEMISTRY
COMPOSITIONS BASED THEREON
MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS
METALLURGY
ORGANIC MACROMOLECULAR COMPOUNDS
THEIR PREPARATION OR CHEMICAL WORKING-UP
title DEVOLATILIZATION OF ETHYLENE/ALPHA-OLEFIN COPOLYMER PELLETS
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