Spin mode instabilities in propagating fronts of polymerization

Abstract We have observed two instabilities in propagating fronts of methacrylic acid polymerization, both of 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 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°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.

[1]  S. M. Kogarko,et al.  Investigation of spherical detonation of gas mixtures , 1965 .

[2]  A. G. Merzhanov,et al.  Spin combustion of gasless systems , 1979 .

[3]  Gregory I. Sivashinsky,et al.  PROPAGATION OF A PULSATING REACTION FRONT IN SOLID FUEL COMBUSTION , 1978 .

[4]  Jan Degrève,et al.  Modeling of exothermic solid-solid noncatalytic reactions , 1987 .

[5]  Simon Ostrach,et al.  Low-Gravity Fluid Flows , 1982 .

[6]  M. Frankel.  On the nonlinear dynamics of flame fronts in condensed combustible matter , 1989 .

[7]  A. G. Merzhanov,et al.  Unstable regimes of thermite system combustion , 1983 .

[8]  V. Barzykin,et al.  An experimental study of ignition of gasless systems by a combustion wave , 1976 .

[9]  John A. Pojman,et al.  Convective instabilities in traveling fronts of addition polymerization , 1992 .

[10]  G. Leaf,et al.  On Nonadiabatic Condensed Phase Combustion , 1987 .

[11]  Richard D. Kaverman.  Reinforced Plastics and Composites , 1991 .

[12]  Arvind Varma,et al.  Combustion synthesis of advanced materials , 1992 .

[13]  J. Pojman,et al.  Traveling fronts of addition polymerization with a solid monomer , 1993 .

[14]  Methacrylic acid polymerization. Traveling waves observed by nuclear magnetic resonance imaging , 1992 .

[15]  A. G. Merzhanov,et al.  Unstable combustion modes of gasless systems , 1981 .

[16]  A. Bayliss,et al.  Two routes to chaos in condensed phase combustion , 1990 .

[17]  V. M. Shkiro,et al.  Structure of fluctuations occurring in the burning of tantalum-carbon mixtures , 1978 .

[18]  Bernard J. Matkowsky,et al.  Fronts, relaxation oscillations, and period doubling in solid fuel combustion , 1987 .

[19]  Z. A. Munir,et al.  The propagation of a solid‐state combustion wave in Ni‐Al foils , 1989 .

[20]  V. Volpert,et al.  Propagation of frontal polymerization—crystallization waves , 1994, European Journal of Applied Mathematics.

[21]  J. Pojman.  Traveling fronts of methacrylic acid polymerization , 1991 .

[22]  A. G. Merzhanov,et al.  Trends in the spin combustion of thermites , 1982 .

[23]  P. V. Zhirkov,et al.  Problems of Non-isothermal Character in Polymerisation Processes , 1984 .