Abstract
The cationic ring-opening terpolymerization of tetrahydrofuran (THF)-phthalic anhydride (PAn)-epichlorohydrin (ECH) was found to be initiated by carbon black having CO+ClO4− groups. The activation energy of the terpolymerization was estimated to be 13.8 kcal mol−1. Evidence for the formation of random terpolymers was obtained by IR, NMR, and GPC analysis. The composition of terpolymer was affected by an initial monomer charge ratio: the content of PAn in terpolymer decreased and that of ECH increased with an increase in the amount of ECH charged. Terpolymer of a 1:1:1 ratio could be prepared when THF, PAn, and ECH were charged in mole ratios of 1:1:0.7. In such a polymerization system, terpolymer formed is effectively grafted from carbon black surface depending upon the propagation of polymer chain from CO+ClO4− groups. The grafting ratio and molecular weight of ungrafted polymer were found to decrease with a rise in polymerization temperature. Furthermore, the dispersibility of terpolymergrafted carbon black in chloroform was investigated.
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Tsubokawa, N., Jian, Y. & Sone, Y. Cationic Grafting from Carbon Black VI. Grafting of Polyetheresters from Carbon Black by Cationic Ring-Opening Terpolymerization of Tetrahydrofuran-Cyclic Acid Anhydrides-Epichlorohydrin. Polym J 19, 221–229 (1987). https://doi.org/10.1295/polymj.19.221
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DOI: https://doi.org/10.1295/polymj.19.221