THE POLYMERS SOLUTION DEGRADATION CONTROL ON THE BASIS OF INITIATOR FRACTIONAL LOADING

Abstract

Summary. The technological process of thermal oxidative degradation on the basis of initiator fractional loading is considered. The advantage of controlled degradation at the initiator fractional loading in order to provide continuous dosing of the initiator with high accuracy is difficult in industrial environments. Slight deviations caused by dispensers error, can significantly change the kinetics of degradation, due to high sensitivity of the initiator concentration. From the point of view of the technology realization the process of fractional dosing initiator is more convenient. It is shown that carrying out the controlled degradation under identical initial conditions reaction, we manage to reduce significantly the time of the process to the desired degree of degradation. The reaction time is reduced to more than 1.5 times. Carrying out a controlled degradation allows implement the projected degradation by linear law depending on time. Kinetics linearity is provided at a continuous loading of initiator and as well as a fraction loading. In this case the fractional loading should be done at regular intervals of time. The reaction time is control parameter in both control regimes which is linearly connected with to the given degree of degradation. In this case, the opportunity to control software arises, herewith we need know only the initial quality of the polymer, i.e. its initial number average molecular weight. The calculated dependences, which allow estimate a single loading initiator value, depending on the period of the fractional dosages of initiator are obtained. An approximate calculation linear dependence of the degradation process kinetics in the case of initiator continuous loading and under fractional loading are shown.