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Some aspects of the theory and practice of frontal polymerization pp.345-388 $100.00
Authors:  (H.H. Zakaryan, A.O. Tonoyan, S.P. Davtyan, State Engineering University of Armenia, Armenia)
Abstract:
Quasi-stationary concentration principle (QSC) was used to study radical
polymerization of vinyl monomers during reaction traveling front. Based on the
experimental results and numerical calculation of the one-dimensional front, it was
shown that the zone could be both narrow and wide. Full and quasi–stationary problems
were solved for different sets of kinetic and thermo-physical parameters typical for vinyl
monomers’ radical polymerization.
Anion activated copolymerization of ε-caprolactam with ω-dodecalactam has been
investigated during heat wave propagation. It was shown that separation of
polymerization and crystallization auto waves takes place at 1300C (initial temperature of
the reaction mixture). The observed limiting heating temperature oscillation leads to
disruption of the crystallization auto waves. It was assumed that the reasons for these
unstable regimes are the multiple sequential melting and crystallization processes. A
thermometric method of determination of the composition of co-polymers is proposed.
A one-dimensional and two-dimensional model of frontal solidification of epoxy
compounds by the aromatic amines in tubular flux reactors is investigated. The influence
of some kinetic factors on the velocity of traveling of the front, on the reactor heat
regimes and on the geometric dimensions of the reactor is studied. Profiled armored
carbon and glass plastics forming laboratory installation is constructed based on the
obtained theoretical results. It was shown that the theoretical and practical results
correspond satisfactorily. Several physical-mechanical properties (bending strength,
longitudinal modulus of elasticity) as based on the reactor wall temperature, angle of
armoring and tension is determined. 


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Some aspects of the theory and practice of frontal polymerization pp.345-388