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Polyketone materials: control of glass transition temperature and surface polarity by co‐ and terpolymerization of carbon monoxide with higher 1‐olefins
Author(s) -
AbuSurrah Adnan S.,
Wursche Roland,
Rieger Bernhard
Publication year - 1997
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/macp.1997.021980421
Subject(s) - copolymer , polymer chemistry , glass transition , carbon monoxide , olefin fiber , propene , monomer , crystallization , chemistry , contact angle , catalysis , materials science , polymer , organic chemistry , composite material
Highly soluble alternating 1‐olefin/carbon monoxide copolymers with olefin monomers (H 2 CCHR) containing 4, 5, 6, 10, 14, 16 and 18 C‐atoms in the R‐substituents were prepared by the use of dicationic palladium(II) phosphine catalysts and an optimized amount of methanol as activator. In terpolymerization experiments the influence of icosene‐CO or octadecene‐CO units, distributed randomly along a propene‐CO or ethene‐CO copolymer backbone, on molecular weight, glass transition temperature and on the surface polarity of films casted from solution has been investigated. As the length of the α‐olefin side chain increases, the glass transition temperature ( T g ) of the copolymer is reduced from room temperature to almost −60°C. For octadecene‐CO and icosene‐CO copolymers side chain crystallization occurs, leading to elastic materials. Contact angle measurements, performed on water drops located on the surface of selected co‐ and terpolymer films demonstrate the wide range of surface polarity which can be covered by simple copolymerization of polar CO groups with apolar alkenes.