Publication Details (including relevant citation information):
Emulsion Polymers and Emulsion Polymerization, D. R. Bassett and A. E. Hamielec, Eds., ACS Symposium Series #165 (1981)
Frequently the extent of conversion in commercial polymerization reactors can be monitored by measuring the total heat evolved. This is possible because of the large volume-to-surface area ratio of these reactors. The small scale laboratory preparations become much more difficult to follow by calorimetry. Meeks(1) has reported a suitable laboratory scale isothermal reactor utilizing an analog computer. Many other reaction calorimeter designs are known. Other methods, such as dilatometry and gravimetric analysis, have been used in the laboratory. A method for monitoring polymerizations was desired which would avoid the restrictions on reactor design, provide rapid response, and allow for automatic data collection and possibly control. The apparatus of Meeks appeared appropriate except that the reaction vessel was an integral part of the instrument.
The use of a precision digital density meter as supplied by Mettler Instruments (Anton Paar, Ag.) appeared attractive. Few references on using density measurements to follow polymerization
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