ISSN:
0449-2951
Keywords:
Chemistry
;
Polymer and Materials Science
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
,
Physics
Notes:
Anionic block polymerization of styrene onto polystyrene anions was found to be a useful diagnostic method which can readily reveal when the chosen polymerization conditions are conducive to complete catalyst consumption and quantitative block polymerization. With Na-naphthalene as initiator, it was shown that under the proper polymerization conditions (a) the initiator is essentially completely consumed in the first polymerization step, thus avoiding initiation of new chains in the following polymerization steps, (b) in each block polymerization step, styrene adds quantitatively to the preformed live anions, and (c) essentially no termination is observed throughout the successive block polymerization steps. The ratio of monomer to initiator greatly affects the efficiency of initiator consumption. The rate of agitation is also considered to play a dominant role.
Additional Material:
1 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/pol.1963.100010636
