期刊
MACROMOLECULES
卷 46, 期 11, 页码 4454-4461出版社
AMER CHEMICAL SOC
DOI: 10.1021/ma302514s
关键词
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资金
- Nuclear RD
- NRF [2011-0022690]
- Converging Research Center [2010K001430]
- APCPI ERC [R11-2007-050-00000]
- Ministry of Education, Science & Technology (MEST), Korea
- National Research Foundation of Korea [2011-0022690] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
We investigated the phase behaviors of block copolymer (BCP) blends composed of the weakly interacting (with no specific interaction) polystyrene-b-poly(n-butyl methacrylate) (PS-b-PnBMA) and polystyrene-b-poly(n-hexyl methacrylate) (PS-b-PnHMA), using small-angle neutron scattering (SANS), small-angle X-ray scattering (SAXS), and depolarized light scattering (DPLS). A miscible phase between the PnBMA and PnHMA blocks in the BCP blends allows the various composition-dependent phase behaviors, which display a lower disorder-to-order transition (LDOT) to an order-to-disorder transition (ODT) on heating as the blend composition varies from PS-b-PnBMA to PS-b-PnHMA. In between these two extremes, intriguingly, the miscible PS-b-PnBMA/PS-b-PnHMA blends display a closed-loop phase transition consisting of a LDOT and an upper order-to-disorder transition (UODT).
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