## Abstract Block copolymer nanopaticles were prepared from the mixture solutions containing good/poor solvents by a simple evaporation process. The block copolymers formed disorder, unidirectionally stacked lamellar, and onionβlike structures in nanoparticles depending on preparation temperatures.
Multiple phase transitions in block copolymers
β Scribed by Frenkel, S. Ya. ;Vilesov, A. D.
- Publisher
- Wiley (John Wiley & Sons)
- Year
- 1984
- Weight
- 828 KB
- Volume
- 6
- Category
- Article
- ISSN
- 0025-116X
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β¦ Synopsis
Institute of Macromolecular Compounds o f the Academy o f Sciences of the USSR, Leningrad, USSR * Abstract -A structon model of supercrystals f o r describing tile dynamic properties and multiple phese transitions of superlattices,formed in systems of block copolymers with segregated domains,is applied and experimentally substantiated.
π SIMILAR VOLUMES
**Organized structures over length scales differing by 10^3^** are reported, i.e., crystals of rod block (unit cell βΌβ1 nm), block copolymer microdomains (layer periodicity βΌβ50 nm), and NΓ©el domain walls (wall periodicity βΌβ1000 nm)βsee Figure and inside front cover. The result is an example of com
Air,watt--Intrinsic viscosity vs. composition curves of block copolymers of polyisoprene and polystyrene in a mixed solvent (cyclohexane q-n-heptane) show a transition at a critical composition (Yc) provided the temperature of the system is above a conformational transition temperature (T)) found pr
Films of block eopolymers of polystyrene + isoprene, cast from cyciohexane at temperatures above and below a conformational transition temperature (Tp) derived from the plot of ['/l vs. T, have been examined for glass transition temperatures. In every case, two glass transitions were found, Twl (pol