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首页> 美国政府科技报告 >Rheoptical Studies of Blends of Poly(Styrene-b-Butadiene-b-Styrene) and Polystyrene.
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Rheoptical Studies of Blends of Poly(Styrene-b-Butadiene-b-Styrene) and Polystyrene.

机译：聚（苯乙烯-b-丁二烯-b-苯乙烯）与聚苯乙烯共混物的流变光学研究。

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Polyblends of poly(styrene-b-butadiene) and polystyrene were cast from a tetrahydrofuran/methyl ethyl ketone mixture using a spin caster. These samples were found to undergo a 'strain-induced plastic-rubber transition' upon deformation. Infrared dichroism, birefringence, small angle x-ray scattering, small angle light scattering and scanning electron micrograph studies were carried out to investigate this phenomenon. Infrared dichroism and birefringence studies both indicate the high orientation of the polybutadiene chains, but not of the polystyrene chains, upon stretching. Thus most of the deformation after the 'transition' has taken place is due to the rubbery domains. Small angle x-ray scattering results reveal that the morphology in the three coordinate directions was different. Upon stretching, the polystyrene domains may have broken up into smaller sub-domains which could be responsible for the observed plastic-rubber transition. The small angle light scattering and scanning electron micrograph results appear to be consistent with the above proposed interpretations. (Author)

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