Spin Mode-Instabilities in Propagating Fronts of Polymerization
Chemistry and Biochemistry
We have observed two instabilities in propagating fronts of methacrylic acid polymerization, both elf which give the appearance of a spin mode. One occurs with liquid monomer when the tube is subjected to an external airflow to increase the rate of heat loss. It is a novel instability caused by convection related to bubble formation. Spinning modes very similar to ones observed in solid-state combustion reactions were observed when the initial methacrylic acid/initiator solution was maintained at 0 degrees C. The helical pattern left in the polymer and temperature profile measurements confirm for the first time the presence of a true spin mode in a constant velocity polymerization front.
Pojman, J. A.,
Ilyashenko, V. M.,
Khan, A. M.
(1995). Spin Mode-Instabilities in Propagating Fronts of Polymerization. Physica D, 84(41276), 260-268.
Available at: http://aquila.usm.edu/fac_pubs/5875