In the present work we study pattern formation in a bi-soft segment urethane/urea elastomer. The material under study is a film prepared from a polypropylene oxide based isocyanate terminated trial prepolymer (PU) and polybutadiene dial (PBDO) with 60% by weight of PBDO. Small angle light scattering (SALS) patterns were recorded as a function of elongation for different rates of extension. It was found that the process of band and stripe formation is dependent upon the sample elongation and rate of extension with a strong increase of band and stripe amplitude with increasing elongation. The SALS data also reveals that the bands' periodicity is independant of the rate of extension within the range studied.
|Journal||Molecular Crystals and Liquid Crystals|
|Publication status||Published - 2004|
|Event||19th International Liquid Crystal Conference, ILCC2002 - Edinburgh, United Kingdom|
Duration: 30 Jun 2002 → 5 Jul 2002
- Liquid crystalline elastomers
- Pattern formation
- Urethane/urea elastomers