SANS Results on Blends

Renormalized 3D-lsing Critical Behavior in Blends and Blend-Solvent Systems 

Crossover to the renormahzed Ising critical behavior was observed in two symmetric ( a = b) PB/PS polymer blends without any solvent but not in the corresponding blends mixed with the non-selective solvent oDCP up to a concentration of 20vol%. It might be instructive to compare the observations in both blends with results from polymer blend-solution mixtures obtained by the group of Nose [44,45]. In their experimental work no crossover was found in symmetric blend-solvent samples in accord with 

A first systematic study of such systems with SANS was performed on the relatively large molar mass symmetric polyolefins PE and PEP and the corresponding diblock copolymer PE-PEP, PE being polyethylene and PEP being poly(ethylene propylene) [46]. A mean field lifshitz-hke behavior was 

As this article is devoted to critical crossover phenomena in polymer blends, we limit our considerations to homopolymer blends of critical composition mixed with diblock concentrations below the Lifshitz line. 

Phase Diagram of a (A/B) Polymer Blend/(A-B) Diblock Copolymer Mixture 

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