The author is indebted in a very special way to his thesis director Professor Richard S. Stein for not only his inspiration and invaluable guidance during this work, but also his inexhaustible patience throughout. Many thanks are due to the committee members for their helpful comments and criticisms at various stages of this work and for accommodating the author in many ways towards the end of his stay at the University of Massachusetts . Samples of both polymers were provided by Dr. J. Koleske

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... of Union Carbide Corp. and a standard Lupolen sample was kindly provided by Professor 0. Kratky of the University of Graz. Their generosities are appreciated very much. Thanks are also due to members of the research group for their valuable suggestions during the course of several presentations, particularly to continued stimulating discussions with Drs. Prud T homme, Misra and Natarajan, especially with regards to small-angle light scattering studies. The many interesting discussions with Drs. Wenig and Waisiak regarding small-angle x-ray scattering are also appreciated.