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 onion-like structures in nanoparticles depending on preparation temperatures. Thermal annealing induced the disorder-order phase transition and order-order phase transformation in the block copolymer nanoparticles, even though the annealing temperature is lower than the of one polymer segment. The unusual thermal behaviors suggest that the glass transition temperature of the block copolymer is decreased by the effect of nanoparticle, whose surface areas are larger than their volumes. Block copolymer nanoparticles were prepared from the mixture solutions containing good/poor solvents by a simple evaporation process. Thermal annealing induced the disorder"order phase transition and order"order phase transformation in the block copolymer nanoparticles, even though the annealing temperature is lower than that of one polymer segment. The unusual thermal behaviors suggest that the glass transition temperature of the block copolymer is decreased by the effect of nanoparticle.
Original language | English |
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Pages (from-to) | 1773-1778 |
Number of pages | 6 |
Journal | Macromolecular Rapid Communications |
Volume | 31 |
Issue number | 20 |
DOIs | |
Publication status | Published - 2010 Oct 18 |
Keywords
- Block copolymer
- Microphase separation structure
- Nanoparticle
- Phase transformation
- Phase transition
ASJC Scopus subject areas
- Organic Chemistry
- Polymers and Plastics
- Materials Chemistry