Phase separation of compatibilized polymer blends during shear
- National Institute of Standards and Technology, Gaithersburg, MD (United States)
The phase separation and mixing behavior during shear of a blend of polystyrene (PS) and polybutadiene (PB) with and without a symmetric diblock copolymer added (PS-PB) are examined as a function of quench depth and copolymer concentration for a fixed ratio of PS to PB. This blend exhibits upper critical solution temperature (UCST) behavior (60:40 PS:PB, T{sub c} = 108{degrees}C). The results are obtained on a static light scattering instrument coupled to a transparent cone and plate rheometer with a two-dimensional charge-coupled device detector. A comparison of the homopolymer blend with the three-component mixture showed enhanced mixing during isothermal, steady shear experiments and a suppressed rate of phase separation while cooling with shear in the three-component system.
- OSTI ID:
- 602889
- Report Number(s):
- CONF-961108-; TRN: 98:001968-0043
- Resource Relation:
- Conference: Annual meeting of the American Institute of Chemical Engineers (AIChE), Chicago, IL (United States), 10-15 Nov 1996; Other Information: PBD: 1996; Related Information: Is Part Of 1996 First joint topical conference on processing, structure and properties of polymeric materials; PB: 594 p.
- Country of Publication:
- United States
- Language:
- English
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