Thermal composition fluctuations near the isotropic Lifshitz critical point in a ternary mixture of a homopolymer blend and diblock copolymer
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Thermal composition fluctuations near the isotropic Lifshitz critical point in a ternary mixture of a homopolymer blend and diblock copolymer
We have studied thermal composition fluctuations of a ternary symmetric homopolymer/diblock copolymer system of PEE/PDMS/PEE-PDMS @PEE and PDMS being poly~ethyl ethylene! and poly~dimethyl siloxane!, respectively# in its disordered state with small angle neutron scattering for concentration F of diblocks up to 15%. The phase diagram shows three characteristic regimes; ~1! below the Lifshitz con...
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Thermal composition fluctuations and the associated crossover from the 3D Ising to the isotropic Lifshitz universality class have been studied in a three component mixture made of a critical polymer blend and the corresponding diblock copolymer. The critical exponents were found to be appreciably larger than those of the 3D Ising, in agreement with expectations from the larger upper critical di...
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We present results of the study of the non-monotonous behavior of the Lifshitz line as a function of temperature in ternary homopolymer/diblock-copolymer mixtures. The non-monotonous behavior of the Lifshitz line is due to the wave vector dependence of fluctuational corrections, which we treat in the framework of the renormalization group method. Our results are in agreement with the experiment...
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Ordered diblock copolymer blends have recently become the subject of tremendous research interest since they can be used to elucidate the intramicrodomain segregation of blocks differing in length, as well as to identify the molecular and blend parameters yielding phase immiscibility. In this work, we explore the influence of molecular architecture on block copolymer blend miscibility by examin...
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ژورنال
عنوان ژورنال: The Journal of Chemical Physics
سال: 2000
ISSN: 0021-9606,1089-7690
DOI: 10.1063/1.481128