Abstract
Flow birefringence experiments are confined to the low shear rate regime in which it is known that such solutions exhibit director tumbling. The optical results exhibit characteristics common to poly(benzyl glutamate) solutions, including oscillatory responses that scale with shear strain and relaxation process that scale inversely with the previously applied shear rate. The measured degree of orientation is compared with the transient predictions of the linear Larson and Doi tumbling polydomain model. The results reveal some shortcomings of the model regarding its predictions of molecular orientation
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