Cengiz, UgurErbil, H. Yildirim2025-01-272025-01-2720140303-402X1435-1536https://doi.org/10.1007/s00396-014-3250-8https://hdl.handle.net/20.500.12428/27036Statistical copolymers of perfluoroalkyl ethyl methacrylate (Zonyl-TM) and styrene (S) were synthesized in CO2-expanded monomer medium at a low initial pressure of 25 MPa. Different Zonyl-TM/S feed ratios were used during copolymerizations, and it was determined that the increase in the Zonyl-TM content and decrease of the CO2 amount in the comonomer feed resulted in a decrease of the molecular weights of copolymers due to earlier precipitation of copolymers giving shorter chains. The cloudy CO2-expanded liquid monomer phase was found to be the main loci of copolymerization. In addition, the increase in the Zonyl-TM feed ratio resulted in an increase in the critical degree of the polymerization time (J (crit)) as the time when the copolymer chains start to precipitate. The higher the Zonyl-TM content used in the feed, the higher the J (crit) time and the lower the weight-average molecular weight (M (w)) of the copolymer obtained. Thermal analysis results of the copolymer indicated that the copolymers are stable up to 387-403 A degrees C.eninfo:eu-repo/semantics/closedAccessPerfluoromethacrylate copolymersStyreneCO2-expanded monomer phaseArticle29292207221510.1007/s00396-014-3250-8Q2WOS:0003414899000152-s2.0-84956796218Q2