Polyacrylates, fluorinated

Synthesis and Structure-Property Relationships of Low-Dielectric-Constant Fluorinated Polyacrylates ... 

A = Polyester-urethane B = Fluorinated polyacrylate C = Polyether urethane D = Anhydride cured epoxy 1 E = Anhydride cured epoxy 2 F = One-component epoxy 1 ... 

The Bergbreiter group was also the first to show that fluorinated acrylates were suitable as supports for fluorous ligands and catalysts [172]. Using the sequence of reactions shown in Eq. 76, a fluorinated polyacrylate Rh(I) hydrogenation catalyst 136 was prepared. The catalyst so formed had 0.013 mmol of Rh/g and three equivalents of phosphine/Rh. 

Hao et al. [64] prepared fluorinated polyacrylate emulsion (CFBDH) and solution (SFBDH) by polymerization of dodecafluoroheptyl methacrylate (DFMA) with BA, dimethylaminoethyl methacrylate (DM), and 2-hydroxypropyl acrylate (HpA) via seeded emulsion polymerization and solution polymerization, respectively. Scheme 6.14 shows the structure of CFBDH. 

L. Hao, Q. An, W. Xu, L. Huang, Synthesis, film morphology and hydrophobicity of novel fluorinated polyacrylate emulsion and solution on silicon wafer. Colloids Surf. A Physicochem. Eng. Aspects 396 (2012) 83-89. 

The controlled/living heterogeneous radical polymerization in SCCO2 has been reviewed quite recently. Hie works are related to precipitation polymerization, that is, in the absence of stabilizer but also dispersion polymerization, in which a C02-philic stabilizer has to be introduced. Hie latter is usually a polymer, either PDMS or a fluorinated polyacrylate. 

Metal-organic complexes and amorphous fluoropolymers used as catalysts in many organic syntheses exhibit excellent solubility in ScCO [9]. Fluoropolymers such as poly(chlorotrifluoroethylene), fluorinated polyacrylates, copolymers of fluorinated acrylates with methacrylate, n-butyl acrylate, styrene, ethylene, etc. which are used to enhance the solubility of the catalyst are also reported to be highly soluble in SCCO2 [9]. Temperature and pressure dependent catalyst solubility not only enhances its activity, but also permits easy recovery and recycle of the catalyst at the end of the reaction. It is possible to precipitate the catalyst and sometimes the product by suitable adjustments in temperature and pressure, and integrate reaction and separation. 

---