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.
U2 - 10.1016/S0014-3057(99)00053-1
DO - 10.1016/S0014-3057(99)00053-1
M3 - Article
SN - 0014-3057
VL - 36
SP - 183
EP - 193
JO - European Polymer Journal
JF - European Polymer Journal
IS - 1
ER -