Author/Authors :
Park، نويسنده , , Eun Ju and Richez، نويسنده , , Alexandre P. and Birkin، نويسنده , , Natasha A. and Lee، نويسنده , , Hyunsuk and Arrowsmith، نويسنده , , Nicholas and Thurecht، نويسنده , , Kristofer J. and Howdle، نويسنده , , Steven M.، نويسنده ,
Abstract :
In this paper we demonstrate new poly vinyl alkylate homopolymers and copolymers with excellent solubility in scCO2 that can be used as stabilisers for dispersion polymerisation in scCO2. Poly (vinyl acetate) (PVAc) was combined in various ratios with poly (vinyl butyrate) (PVBu) and poly (vinyl octanoate) (PVOc) to both tune the scCO2-solubility and provide adequate steric stabilisation. The polymer cloud points observed were found to be dependent on the ratio of the different blocks and the molecular weights and polydispersities (PDI) of the polymers. The effectiveness of these new polymeric stabilisers for dispersion polymerisation of N-vinyl pyrrolidone (N-VP) in scCO2 is presented.
