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Thermal and X‐ray investigations of ethylene–α‐olefin copolymers obtained with highly active supported Ti–Mg and V–Mg catalysts
Author(s) -
Echevskaya L. G.,
Zakharov V. A.,
Marathe S.,
Sehra J. C.,
Jog J. P.,
Sivaram S.
Publication year - 1994
Publication title -
polymer international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.592
H-Index - 105
eISSN - 1097-0126
pISSN - 0959-8103
DOI - 10.1002/pi.1994.210330113
Subject(s) - crystallinity , copolymer , ethylene , materials science , thermal stability , magnesium , crystallization , catalysis , polymer chemistry , olefin fiber , vanadium , titanium , ethylene propylene rubber , polymer , organic chemistry , chemistry , composite material , metallurgy
Copolymers of ethylene with propylene, butene‐1 and hexene‐1 were prepared using a titanium–magnesium (TMC) or a vanadium–magnesium catalyst (VMC). The copolymers were examined for thermal stability by TGA, melting and crystallization behaviour by DSC and crystallinity by XRD. Fractionated samples of ethylene–hexene‐1 copolymers were also similarly characterized. Results indicate that VMC produces copolymers with a higher degree of crystallinity and greater compositional homogeneity than TMC.