6. The efficiency of ABN in initiating polymerization at 60°C was determined by the following strategy. They measured B, and v and calculated B. - B₁/v. The constant kd was measured

directly in the system, and from this quantity and the measured ratio B,/v the fraction f could be determined. The following results were obtained for different concentrations of initiator. Using k.-0.0388 h¹, evaluate f from these data. (where fis your radical efficiency factor). (10 points) [I] (gL¹) Rp/ × 10ª (mol L−¹ s¯¹) 0.377 1.57 1.72 6.77 0.0556 0.250 0.250 1.00 1.50 2.50 10.9 17.1