STUDIES FROM S.P. DAVTYAN ET AL FURTHER UNDERSTANDING OF CHEMICAL ENGINEERING

Science Letter
March 23, 2010

CHEMICAL ENGINEERING

According to a study from Yerevan, Armenia, "Frontal radical
polymerization of vinyl monomers in non-stationary mode is investigated
theoretically."

"It is shown that the formation and the time of establishment of
steady-state polymerization heat autowaves considerably depend on the
initial temperature, T-i. When T-i is less than the adiabatic heating
temperature (T-a), the excess heat and relatively high conversion
foster front formation before the non-stationary one," wrote S.P.

Davtyan and colleagues (see also Chemical Engineering).

The researchers concluded: "Whereas, for T-i > T-a, steady-state
frontal polymerization regime is established, when the heat flow from
the outer source is considerably less than the heat evolving due to
the chemical reaction."

Davtyan and colleagues published their study in Chemical Engineering
Journal (Peculiarities of establishment of steady-state frontal
polymerization of vinyl monomers. Chemical Engineering Journal,
2009;155(1-2):292-297).

For more information, contact S.P. Davtyan, State Engn University
Armenia, 105 Teryan, Yerevan 0009, Armenia.

Publisher contact information for the Chemical Engineering Journal is:
Elsevier Science SA, PO Box 564, 1001 Lausanne, Switzerland.