AN ON-TROUGH POLYMERIZATION STUDY OF PYRROLE DERIVATIVES

In this paper, we present a study of the polymerization of 3-hexadecyl -pyrrole (3HP) and 3-decyl-pyrrole (3DP), performed at the air-liquid interface of a Langmuir trough. In particular, we give data on. the ki netics of the process and on the compressibility of the products obtai ned. The comparison between the two substances has shown that 3HP is t he best in terms of stability and of the quality of the layers formed. An estimation of the polymerization efficiency is given in the case o f 3HP. The UV-Vis-NIR analysis made after the polymerization has shown that oligomers have been formed. This result is comparable with that obtained with a traditional ''bulk'' polymerization. Besides, the exam ination of the isotherm recorded after the polymerization shows that t he polymer obtained with this method is more stable and has a better b ehaviour than that obtained via the traditional ''bulk'' method. (C) 1 997 Elsevier Science S.A.