Analysis of the Complex Modulus

G and G can be expressed in terms of frequency co and Maxwell relaxation time Tjjj by, 

In oscillatory techniques, two types of experiment must be carried out 

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The authors also reported on A-B-A type block copolymers composed of poly(y-benzyl-L-glutamate) as the A component and polyisoprene as the B component. By using wide-angle X-ray diffraction it could be shown that the block copolymers exhibit mesophase behavior in different solvents. In this case polyisoprene chains are in a random coil conformation and form domains embedded in the matrix phase consisting of poly(y-benzyl-L-glutamate) chains in the a-helix conformation. Model analysis of the complex modulus of the membrane cast from solution suggested the occurrence of spherical and cylindrical domain structures in the membrane [73]. Morphological study of these triblock copolymers... 

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