Dynamic viscoelastic behavior of ABA block polymers and the nature of the domain boundary

Dynamic viscoelastic properties of block copolymers of styrene with butadiene or isoprene are consistent with the growth of a diffuse interphase or interlayer as block lengths decrease. Under the conditions of the present study the interlayer does not lead to a secondary loss maximum between the two domain glass transitions. The pattern of shifts of the loss maxima characteristic of the domain T g 's suggests strongly that the interlayer...