Copolymerization of ethylene and non-conjugated dienes with Cp2ZrCl2/MAO catalyst system: Effect of polymerization temperature on the copolymer structure

Pirjo Pietikäinen, Jukka Seppälä, Lisbeth Ahjopalo, Lars-Olof Pietilä

Research output: Contribution to journalArticleScientificpeer-review

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Abstract

Ethylene was copolymerized with linear, non-conjugated dienes by the metallocene catalyst system Cp2ZrCl2/MAO at several temperatures from 20 to 80°C. The dienes were 1,5-hexadiene (HD), 1,7-octadiene (OD) and 7-methyl-1,6-octadiene (MOD). Incorporation of the dienes was studied by 1H  and 13C  NMR and FTIR. Polymerization conditions had a dramatic effect on the degree of crosslinking of the product. At polymerization temperatures from 20 to 65°C the copolymers of ethylene and HD or OD were nearly totally crosslinked, whereas at 80°C the degree of crosslinking was consistently under 10%. When MOD was used as comonomer the degree of crosslinking did not increase above 40% even for copolymer produced at 20°C.
Original languageEnglish
Pages (from-to)183-193
JournalEuropean Polymer Journal
Volume36
Issue number1
DOIs
Publication statusPublished - 2000
MoE publication typeA1 Journal article-refereed

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Monoamine Oxidase
copolymerization
dienes
crosslinking
Crosslinking
hexadiene
Copolymerization
copolymers
Ethylene
ethylene
Copolymers
polymerization
Polymerization
catalysts
Catalysts
Temperature
temperature
Nuclear magnetic resonance
nuclear magnetic resonance
products

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Pietikäinen, Pirjo ; Seppälä, Jukka ; Ahjopalo, Lisbeth ; Pietilä, Lars-Olof. / Copolymerization of ethylene and non-conjugated dienes with Cp2ZrCl2/MAO catalyst system : Effect of polymerization temperature on the copolymer structure. In: European Polymer Journal. 2000 ; Vol. 36, No. 1. pp. 183-193.
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abstract = "Ethylene was copolymerized with linear, non-conjugated dienes by the metallocene catalyst system Cp2ZrCl2/MAO at several temperatures from 20 to 80°C. The dienes were 1,5-hexadiene (HD), 1,7-octadiene (OD) and 7-methyl-1,6-octadiene (MOD). Incorporation of the dienes was studied by 1H  and 13C  NMR and FTIR. Polymerization conditions had a dramatic effect on the degree of crosslinking of the product. At polymerization temperatures from 20 to 65°C the copolymers of ethylene and HD or OD were nearly totally crosslinked, whereas at 80°C the degree of crosslinking was consistently under 10{\%}. When MOD was used as comonomer the degree of crosslinking did not increase above 40{\%} even for copolymer produced at 20°C.",
author = "Pirjo Pietik{\"a}inen and Jukka Sepp{\"a}l{\"a} and Lisbeth Ahjopalo and Lars-Olof Pietil{\"a}",
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Copolymerization of ethylene and non-conjugated dienes with Cp2ZrCl2/MAO catalyst system : Effect of polymerization temperature on the copolymer structure. / Pietikäinen, Pirjo; Seppälä, Jukka; Ahjopalo, Lisbeth; Pietilä, Lars-Olof.

In: European Polymer Journal, Vol. 36, No. 1, 2000, p. 183-193.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Copolymerization of ethylene and non-conjugated dienes with Cp2ZrCl2/MAO catalyst system

T2 - Effect of polymerization temperature on the copolymer structure

AU - Pietikäinen, Pirjo

AU - Seppälä, Jukka

AU - Ahjopalo, Lisbeth

AU - Pietilä, Lars-Olof

PY - 2000

Y1 - 2000

N2 - Ethylene was copolymerized with linear, non-conjugated dienes by the metallocene catalyst system Cp2ZrCl2/MAO at several temperatures from 20 to 80°C. The dienes were 1,5-hexadiene (HD), 1,7-octadiene (OD) and 7-methyl-1,6-octadiene (MOD). Incorporation of the dienes was studied by 1H  and 13C  NMR and FTIR. Polymerization conditions had a dramatic effect on the degree of crosslinking of the product. At polymerization temperatures from 20 to 65°C the copolymers of ethylene and HD or OD were nearly totally crosslinked, whereas at 80°C the degree of crosslinking was consistently under 10%. When MOD was used as comonomer the degree of crosslinking did not increase above 40% even for copolymer produced at 20°C.

AB - Ethylene was copolymerized with linear, non-conjugated dienes by the metallocene catalyst system Cp2ZrCl2/MAO at several temperatures from 20 to 80°C. The dienes were 1,5-hexadiene (HD), 1,7-octadiene (OD) and 7-methyl-1,6-octadiene (MOD). Incorporation of the dienes was studied by 1H  and 13C  NMR and FTIR. Polymerization conditions had a dramatic effect on the degree of crosslinking of the product. At polymerization temperatures from 20 to 65°C the copolymers of ethylene and HD or OD were nearly totally crosslinked, whereas at 80°C the degree of crosslinking was consistently under 10%. When MOD was used as comonomer the degree of crosslinking did not increase above 40% even for copolymer produced at 20°C.

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DO - 10.1016/S0014-3057(99)00053-1

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JF - European Polymer Journal

SN - 0014-3057

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