title: Block copolypeptides. 2. Viscoelastic properties.
abstract: The solid state structure of block copolypeptides of gamma-benzyl L-glutamate (G) and L-leucine (L) case from preferential solvents for G has been investigated by dynamic mechanical and wide angle x-ray diffraction techniques. The WAXD patterns show overlapping reflections characteristic of the individual homopolymers. Further evidence for a phase separated morphology is provided by the viscoelastic behavior. Representation of the dynamic elastic modulus in terms of the equivalent mechanical model suggests that phase separation of GLG-type polymers occurs with G as the matrix phase. In the reverse case, LGL-type polymers, it appears that some phase inversion has taken place.
mesh_terms: D004548:Elasticity; D005971:Glutamates; D007930:Leucine; D008433:Mathematics; D010455:Peptides; D011485:Protein Binding; D011487:Protein Conformation; D014783:Viscosity; D014961:X-Ray Diffraction
chemical_list: D005971:Glutamates; D010455:Peptides; D007930:Leucine