Dodecagonal quasicrystalline order in a diblock copolymer melt
نویسندگان
چکیده
منابع مشابه
Dodecagonal quasicrystalline order in a diblock copolymer melt.
We report the discovery of a dodecagonal quasicrystalline state (DDQC) in a sphere (micelle) forming poly(isoprene-b-lactide) (IL) diblock copolymer melt, investigated as a function of time following rapid cooling from above the order-disorder transition temperature (TODT = 66 °C) using small-angle X-ray scattering (SAXS) measurements. Between TODT and the order-order transition temperature TOO...
متن کاملPhase Diagram of Diblock Copolymer Melt in Dimension d=5
Using the self-consistent field theory (SCFT) in spherical unit cells of various dimensionalities, D, a phase diagram of a diblock, A-b-B, is calculated in 5 dimensional space, d = 5. This is an extension of a previuos work for d = 4. The phase diagram is parameterized by the chain composition, f, and incompatibility between A and B, quantified by the product χN. We predict 5 stable nanophases:...
متن کاملMicrophase separation in polyelectrolytic diblock copolymer melt: weak segregation limit.
The authors present a generalized theory of microphase separation for charged-neutral diblock copolymer melt. The stability limit of the disordered phase for salt-free melt has been calculated using random phase approximation (RPA) and self-consistent-field theory (SCFT). Explicit analytical free energy expressions for different classical ordered microstructures (lamellar, cylinder, and sphere)...
متن کاملNucleation of stable cylinders from a metastable lamellar phase in a diblock copolymer melt
The nucleation of a droplet of stable cylinder phase from a metastable lamellar phase is examined within the single-mode approximation to the mean-field Landau–Brazovskii model for diblock copolymer melts. By employing a variational ansatz for the droplet interfacial profile, an analytic expression for the interfacial free energy of an interface of arbitrary orientation between cylinders and la...
متن کاملDynamics and order–disorder transitions in bidisperse diblock copolymer blends
We employ the dynamic extension of self-consistent field theory (DSCFT) to study dynamics and order–disorder transitions (ODT) in AB diblock copolymer binary mixtures of two different monodisperse chain lengths by imitating the dynamic storage modulus G0 corresponding to any given morphology in the oscillatory shear measurements. The different polydispersity index (PDI) is introduced by binary ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Proceedings of the National Academy of Sciences
سال: 2016
ISSN: 0027-8424,1091-6490
DOI: 10.1073/pnas.1601692113