Vn. Kruchinin et al., KINETIC-STUDY OF DIACETYLENE POLYMERIZATION IN MONOLAYERS AND MULTILAYERS OF THE LANGMUIR-BLODGETT TYPE, Thin solid films, 240(1-2), 1994, pp. 131-137
The kinetics of UV polymerization of two amphiphilic diacetylenes CH3(
CH2)11C=CC=(CH2)8COOH (Cd-salt) and [GRAPHICS] has been studied in sit
u in layers synthesized according to the Langmuir-Blodgett method. Thr
ee consequent stages are observed during continuous irradiation: polym
erization, photochromic transition and photolysis. The changes in the
refractive index, the adsorption constant and the film thickness have
been measured for each stage. The photopolymerization of diacetylenes
follows a multistage route in a multilayer system. Spontaneous polymer
ization under photoinitiation has been observed for the films consisti
ng of less than six layers. Models are discussed giving a qualitative
description of the experimental features of the process.