Abstract
Using a simple statistical model, the probability of intramolecular reaction is calculated for the polymerizing diallyl phthalate molecule. The calculation is based on the assumption of the free rotation of bonds and a restriction of the chains considered to 9 and 11 links. Allowance is made for the different types of terminal structure produced during the reaction. The result agrees with the experimental work of Simpson in that an appreciable probability is found. (Theoretical 31%, experimental 41%, saturated groups). It is probable that the accuracy of the results obtained has been increased by reason of the fact that different imperfections in the model affect the result in opposite senses.

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