Functional poly(1,4-ketone)s with pendant hydroxy moieties, 2 Control of polymer properties by the use of functional monomers

Abstract

Novel functional poly(1,4-ketone) terpolymers have been prepared by the Pd(II)-catalyzed alternating copolymerization of carbon monoxide, an apolar alkene and functional termonomers 2-allylphenol 1 and 2-allylanisole 2, respectively. IN these experments [Pd(DPPP)(CH 3 CN) 2 ](BF 4 ) 2 3 served as the catalyst precursor, activated by the addition of a defined amount of methanol. The thermal as well as the physical properties of the obtained functional materials were governed by (a) the concentration of the termonomer within the polymer and (b) the chemical structure of the 1-alkene. Terpolymers containing 1, ethene and carbon monoxide, where 1 is incorporated up to 8.6 mol-% relative to CO displayed a semi-crystalline morphology. Crystallinity and melting were strongly depending on the concentration of the functional component. If propene was applied instead of ethene, amorphous polymers were formed, which offer relatively high glass transition temperatures (up to 141.7°C). Apolar functional materials with a broad range of glass transition temperatures as well as tunable surface polarity result from the use of higher 1-alkenes.