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논문 기본 정보

자료유형
학술저널
저자정보
Haenelt, Taida Gil (Institute of Polymer Research, Helmholtz-Zentrum Geesthacht) Georgopanos, Prokopios (Institute of Polymer Research, Helmholtz-Zentrum Geesthacht) Abetz, Clarissa (Institute of Polymer Research, Helmholtz-Zentrum Geesthacht) Rangou, Sofia (Institute of Polymer Research, Helmholtz-Zentrum Geesthacht) Alisch, Doreen (Institute of Physical Chemistry, University of Hamburg) Meyer, Andreas (Institute of Physical Chemistry, University of Hamburg) Handge, Ulrich A. (Institute of Polymer Research, Helmholtz-Zentrum Geesthacht) Abetz, Volker (Institute of Polymer Research, Helmholtz-Zentrum Geesthacht)
저널정보
한국유변학회 Korea-Australia rheology journal Korea-Australia rheology journal 제26권 제3호
발행연도
2014.1
수록면
263 - 275 (13page)

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The influence of morphology on the viscoelastic properties of melts of microphase-separated polystyrene-block-polyisoprene (PS-b-PI) diblock copolymers was investigated in oscillatory shear and creep recovery experiments. By means of anionic polymerization, three PS-b-PI diblock copolymers with a narrow molecular weight distribution and different types of morphology (spherical, cylindrical and lamellar microstructure) were prepared. Linear viscoelastic shear oscillations and creep recovery experiments in shear were performed in order to determine the elastic and viscous properties of the diblock copolymers in the melt at small and large time scales. Our analysis reveals that melts of diblock copolymers are characterized by a pronounced elastic behavior leading to a relatively large recoverable deformation in creep recovery experiments. The elasticity of the diblock copolymers is also revealed by the appearance of the creep-ringing effect. Morphological investigations were carried out to establish relations between microstructure and melt elasticity. Since ordering phenomena take place in melts of diblock copolymers until an equilibrium morphology is achieved, the storage modulus G' of diblock copolymer melts increases with time up to a steady-state value.

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