Effect of neutral solvent on the phase behavior of polystyrene-block-poly(n-butyl methacrylate) copolymers
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- Title
- Effect of neutral solvent on the phase behavior of polystyrene-block-poly(n-butyl methacrylate) copolymers
- Authors
- Li, CX; Li, GH; Moon, HC; Lee, DH; Kim, JK; Cho, JH
- Date Issued
- 2007-12
- Publisher
- POLYMER SOC KOREA
- Abstract
- The effects of a neutral solvent of dioctyl phthalate (DOP) on the phase behavior of symmetric polystyrene-block-poly(n-butyl methacrylate) copolymers (PS-b-PnBMA) were assessed herein. Closed-loop phase behavior with a lower disorder-to-order transition (LDOT) and an upper order-to-disorder transition (UODT) was observed for PS-b-PnBMA/DOP solution when the quantity of DOP was carefully controlled. When the molecular weight of PS-b-PnBMA became larger, the LDOT did not appreciably change at smaller quantities of DOR With larger quantities of DOP, the reduction in the UODT is greater than the increase in the LDOT. This behavior is discussed in accordance with a molecular theory predicated on a compressible random-phase approximation.
- Keywords
- block copolymer; closed-loop type phase behavior; neutral solvent; CRITICAL ORDERING TRANSITION; LATTICE CLUSTER THEORY; EQUATION-OF-STATE; BLOCK-COPOLYMERS; DIBLOCK COPOLYMERS; MICROPHASE SEPARATION; INTERACTION PARAMETER; IMMISCIBILITY LOOP; CARBON-DIOXIDE; POLYMER BLENDS
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/23011
- DOI
- 10.1007/BF03218946
- ISSN
- 1598-5032
- Article Type
- Article
- Citation
- MACROMOLECULAR RESEARCH, vol. 15, no. 7, page. 656 - 661, 2007-12
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