The resinification of 2-ethenylfuran catalyzed by trifluroacetic acid in water–chloroform mixtures

Influence of Water on the Cationic Polymerisation of 2-Ethenylfuran by Trifluoroacetic Acid in Methylene Dichloride

“…The presence of macromolecules with OH groups is attributed to the polymerisation of FC and suggests that VF gives FC in water due to the hydrolysis of the intermediary ester 1(2-furyl)ethyl trifluoroacetate (M(HA)) as was reported and explained previously by us. [10] In a similar way to resins of FA, [15,16] FC, [13] and P 20 , [10] the band at 1 720 cm -1 appears due to carbonylic structures showing the hydrolysis of some furanic rings in Figure 1. The X-Ray diffraction pattern for experiment P 6 .…”

“…Spectroscopic evidence by IR, NMR, indicate that all the above structures are similar. However, P 19 (System C, see Table 5) is different from the above polymers, but does not differ from P 20 (a detailed study on polymer structure was published by us in the literature [10] ) or those obtained with FC. [13] System A and B…”

“…Chemical compositions for the P 19 (System C) and P 20 in volume ratio (H 2 O/DCM) of 50/50 [10] were similar. The most important IR absorption bands of P 19, and P 20 also appear in a FC resin obtained in DCM using SnCl 4 as the initiator [13] (PFC) (see Table 2).…”

“…The monomer concentration decreased steadily during polymerisation and the kinetic first order in monomer and catalyst could only be explained assuming a steady state for the polarized ester concentration, which is the active center that gives the corresponding carbinol. [10] This paper reports the effect of water on the chemical structure, kinetics and mechanism of the polymerisation of VF initiated by TFA in DCM solution.…”

“…f) Data were reported in the literature. [10] spaces (black areas) with diameters ranging between 0.2-0.6 lm average length.…”