Preparation of Fluorinated Natural Rubber Latex and Its UV and Ozone Resistance of Latex Film

Based on a strategy of combining fluorinated components with excellent stability, fluorinated natural rubber latex (FNRL) was synthesized by emulsion polymerization with NR latex (NRL) using fluorinated acrylates as monomers under mild conditions to solve the problem of poor ageing resistance caused by the unsaturated structure in natural rubber (NR). The fluorination of NRL resulted in the synthesis of FNRL with high stability and FNR latex films with excellent UV and ozone resistance. The results show that FNRL has high stability and its mechanical stability and thermal stability are qualified, which is slightly better than that of the commercial concentrated latex. FNR vulcanized (FNR-V) latex film has better UV and ozone resistance than those of NR vulcanized (NR-V) latex film. After accelerated UV aging test, the crack width of the FNR-V latex film is only 1/3 of that of the NR-V latex film. After ozone aging test, the surface cracking of FNR-V latex films is evaluated at level 1a, while that of NR-V is level 4c. This study provides a feasible way of fluorinated NRL, whose vulcanized latex film has significant improvements in UV and ozone resistance compared to NR latex film, and FNR-V latex film is expected to be widely used under more severe climatic conditions (UV and ozone). [GRAPHICS] .