ISSN:
0022-3832
Keywords:
Chemistry
;
Polymer and Materials Science
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
,
Physics
Notes:
The changes in relative unsaturation of the monomer-polymer system of diallyl phthalate have been studied by means of the infrared absorption hand at 1645 cm.-1 over the temperature range of 60-120° both before and after gelation. It was found that the initial reaction can be described in terms of second-order kineties with an activation energy of 15,900 cal./mole. Relationships have been derived for (a) the dependence of the relative unsaturation u/u0 on the degree of conversion α, and (b) the relationship among α, time, temperature, and catalyst concentration. The value of α at the critical point determined in the above manner is in good agreement with the theory but appears to he temperature-dependent; possible reasons for this dependency are given. It is pointed out that the infrared technique is a suitable method for study of post-gelation kinetics and polymer structure.
Additional Material:
6 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/pol.1959.1203713213
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