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Modified polypropylenes by copolymerization with nonconjugated dienes and additional chemical reactions
Author(s) -
Arnold Manfred,
Bornemann Steffen,
Schimmel Thomas,
Heinze Thomas
Publication year - 2002
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/1521-3900(200205)181:1<5::aid-masy5>3.0.co;2-e
Subject(s) - methylaluminoxane , copolymer , propene , double bond , diene , polymer chemistry , polypropylene , polymerization , chemical modification , materials science , polymer , catalysis , reagent , chemistry , organic chemistry , metallocene , natural rubber
Modified polypropylenes were synthesized by copolymerization of propene with several nonconjugated dienes using a constrained geometry catalyst in combination with methylaluminoxane. The incorporation of the dienes yields in polymer structures containing both cyclic units and linear branches, respectively. By variation of the polymerization conditions the cyclization tendency can be reduced. The resulting propene/diene copolymers are equipped with higher amounts of pendant double bonds which can be used for following chemical reactions. As an example, the epoxidation of the free double bonds was carried out using several epoxidation reagents. In a further modification step, the ring opening of the epoxy groups is presented demonstrating the simplicity of the chemical modification possibilities of such polypropylene materials.