Transition mechanisms for complex ordered phases in block copolymer melts

Article Abstract:

The mechanisms of phase transitions between the lamellar, perforated layer and gyroid morphologies in diblock copolymer melts were investigated using small-angle scattering, dynamic mechanical spectroscopy and transmission electron microscopy. Specifically, the microstructural changes and epitaxial relations of the transformations were examined to determine the factors governing the formation of the perforated layer structure and its subsequent conversion into the gyroid morphology. It was shown that the transitions take place through the nucleation and growth of the final phase.

Morphology (Biology), Molecular structure, Morphology, Microstructure, Microstructures

---

Morphological phase diagram for a ternary system of block copolymer PS310-b-PAA52/dioxane/H2O

Article Abstract:

The partial ternary phase diagram has been analyzed for the polystyrene310-block-poly(acrylic acid)52 copolymer in dioxane/water mixtures in areas in which self-assembled nanoaggregates of a range of morphologies are present. The various observed morphologies could be true equilibrated thermodynamic morphologies.

---

Kinetics and mechanism of the rod-to-vesicle transition of block copolymer aggregates in dilute solution

Article Abstract:

Issues concerning the kinetics and the mechanism of the rod-to-vesicle transition for the PS310-b-PAA52 diblock copolymer are discussed. The kinetic results show that the relaxation times are highly dependent on the initial water content.

Similar abstracts:

• Abstracts: Aggregation mechanism of amphiphilic associating polymers studied by 19F and 13C nuclear magnetic resonance. Thermal equivalent dilution
• Abstracts: Positron annihilation studies of chromophore-doped polymers. Detection method for ionic species based on the electroacoustic effect
• Abstracts: Transport mechanisms of alkanethiols during microcontact printing on gold. Energetics and kinetics of the physisorption of hydrocarbons on Au(111)
• Abstracts: Effect of pore width on micropore filling mechanism of SO2 in carbon micropores. part 2 Hierarchy of fast motions in protein dynamics
• Abstracts: Dominant factors on the micellization of BnEmBn-type triblock copolymers in aqueous solution. Effect of anesthetic molecules (halothane and isoflurane) on the aggregation behavior of POE-POP-POE triblock copolymers

This website is not affiliated with document authors or copyright owners. This page is provided for informational purposes only. Unintentional errors are possible.