Abstract
A study is made of the concentration dependence of the shape effect for methyl methacrylate-styrene copolymers in dioxan, and the macro- and microshape effects are isolated. Despite the considerable length of the segment A for the main chain of the macromolecule, the macroshape effect is much greater than that of the microshape, owing to the considerable thickness of the molecule. The shape asymmetry of the macromolecule p=1·9 (coiling degrees), while that of the statistical segment ps is < 1·5. The latter finding agrees with the estimated value of A/ d≈1 based on measurement of the viscosity and dynamic birefringence in the absence of shape effects (bromoform).
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