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Diblock copolymers phase diagram

Khandpur A.K., Eoerster S., Bates E.S., Hamley I.W., Ryan A.J., Bras W., Almdal K., and Mortensen K. Polyisoprene-polystyrene diblock copolymer phase diagram near the order-disorder transition. Macromolecules, 28, 8796, 1995. [Pg.161]

Khandpur AK, Forster S et al (1995) Polyisoprene-polystyrene diblock copolymer phase diagram near the order-disorder transition. Macromolecules 28 8796-8806... [Pg.186]

Fig. 4.4 Theoretical diblock copolymer phase diagrams for different levels of polydispersity. a An increase of the overall PDI with identical block PDIs results in a shift towards lower xA values while the phase diagram stays symmetrical (Adapted with permission from Cooke et al. [20]. Copyright 2013 American Chemical Society), b An asymmetrical increase of PDI with PD/a > PDIs shifts the phase boundaries towards decreasing xA and increasing /a values, and creates biphasic regions 2-4>. Note that the phase space of the pure gyroid morphology is even narrower for asymmetric block polydispersities (Reprinted with permission from Matsen et al. [21]. Copyright 2013 by the American Physical Society)... Fig. 4.4 Theoretical diblock copolymer phase diagrams for different levels of polydispersity. a An increase of the overall PDI with identical block PDIs results in a shift towards lower xA values while the phase diagram stays symmetrical (Adapted with permission from Cooke et al. [20]. Copyright 2013 American Chemical Society), b An asymmetrical increase of PDI with PD/a > PDIs shifts the phase boundaries towards decreasing xA and increasing /a values, and creates biphasic regions 2-4>. Note that the phase space of the pure gyroid morphology is even narrower for asymmetric block polydispersities (Reprinted with permission from Matsen et al. [21]. Copyright 2013 by the American Physical Society)...
G. Floudas, B. Vazaiou, F. Schipper, R. Ulrich, U. Wiesner, H. latrou and N. Hadjichristidis, Poly(ethylene oxide-b-isoprene) Diblock Copolymer Phase Diagram, Macromolecules 34 2947 (2001). [Pg.82]

Figure 2.4 Diblock copolymer phase diagram parameterized by / and xN, calculated by Cochran et al Reproduced with permission from Ref. [6]. Figure 2.4 Diblock copolymer phase diagram parameterized by / and xN, calculated by Cochran et al Reproduced with permission from Ref. [6].
Figure 16 Theoretical mean-field diblock copolymer phase diagram. The arrows indicate the strong segregation constant composition limits between C/S and L/C. Reproduce from Matsen, M. W. In Soft Condensed Matter Gompper, G. Schick M., Eds. Wiley-VCH Weinheim, 2006 Vol. 1, pp 1-84. Matsen, M.W. Schick, M. Phys. Rev. Lett. 1994, 72,... Figure 16 Theoretical mean-field diblock copolymer phase diagram. The arrows indicate the strong segregation constant composition limits between C/S and L/C. Reproduce from Matsen, M. W. In Soft Condensed Matter Gompper, G. Schick M., Eds. Wiley-VCH Weinheim, 2006 Vol. 1, pp 1-84. Matsen, M.W. Schick, M. Phys. Rev. Lett. 1994, 72,...
Shi A-C, Noolandi J. Binary mixtures of diblock copolymers. Phase diagrams with a new twist. Macromolecules 1995 28 3103-9. [Pg.361]

Figure 1. Schematic diagram of polymer blend and diblock copolymer phase behavior for systems that exhibit a miscibility gap. Figure 1. Schematic diagram of polymer blend and diblock copolymer phase behavior for systems that exhibit a miscibility gap.
Although all copolymer phase diagrams are qualitatively similar, they vary quantitatively from copolymer to copolymer, and they are generally not perfectly symmetric about /a = 0.5. The small differences in phase diagrams for different molecules of the same architectures, for example, diblock PS-PI versus diblock PS-PDB, can thus be characterized in terms of different conformational asymmetries of the polymers. [Pg.323]

Figure B3.6.5. Phase diagram of a ternary polymer blend consisting of two homopolymers, A and B, and a synnnetric AB diblock copolymer as calculated by self-consistent field theory. All species have the same chain length A and the figure displays a cut tlirough the phase prism at%N= 11 (which corresponds to weak segregation). The phase diagram contains two homopolymer-rich phases A and B, a synnnetric lamellar phase L and asynnnetric lamellar phases, which are rich in the A component or rich in the B component ig, respectively. From Janert and Schick [68]. Figure B3.6.5. Phase diagram of a ternary polymer blend consisting of two homopolymers, A and B, and a synnnetric AB diblock copolymer as calculated by self-consistent field theory. All species have the same chain length A and the figure displays a cut tlirough the phase prism at%N= 11 (which corresponds to weak segregation). The phase diagram contains two homopolymer-rich phases A and B, a synnnetric lamellar phase L and asynnnetric lamellar phases, which are rich in the A component or rich in the B component ig, respectively. From Janert and Schick [68].
Figure 1. Phase diagram showing the three distinct regions discussed in the text. Key n, diblock copolymers O, homopolymer blends pip up, heterogeneous pip down, homogeneous solid points, 12B/1,4B open points, l,4l/l,4B half-open point, 1,4I/1,2B with the abscissa representing the weight fraction of 1,2B. Figure 1. Phase diagram showing the three distinct regions discussed in the text. Key n, diblock copolymers O, homopolymer blends pip up, heterogeneous pip down, homogeneous solid points, 12B/1,4B open points, l,4l/l,4B half-open point, 1,4I/1,2B with the abscissa representing the weight fraction of 1,2B.
Fig. 4 Mean-field phase diagrams for melts of a AB diblock copolymer r = 0 and b symmetric ABA triblock copolymer (r = 0.5) plotted in terms of segregation /N and composition /a calculated with SCFT. From [32]. Copyright 2000 American Institute of Physics... Fig. 4 Mean-field phase diagrams for melts of a AB diblock copolymer r = 0 and b symmetric ABA triblock copolymer (r = 0.5) plotted in terms of segregation /N and composition /a calculated with SCFT. From [32]. Copyright 2000 American Institute of Physics...
Fig. 41 Theoretical phase diagram calculated by Matsen et al. [20] for diblock copolymers in intermediate segregation regime. PS-arm-P2VP miktoarm polymers PS- -P2VP linear polymer. From [119]. Copyright 2000 American Chemical Society... [Pg.184]

Fig. 51 Phase diagram for PS-PI diblock copolymer (Mn = 33 kg/mol, 31vol% PS) as function of temperature, T, and polymer volume fraction, cp, for solutions in dioctyl ph-thalate (DOP), di-n-butyl phthalate (DBP), diethyl phthalate (DEP) and M-tetradecane (C14). ( ) ODT (o) OOT ( ) dilute solution critical micelle temperature, cmt. Subscript 1 identifies phase as normal (PS chains reside in minor domains) subscript 2 indicates inverted phases (PS chains located in major domains). Phase boundaries are drawn as guide to eye, except for DOP in which OOT and ODT phase boundaries (solid lines) show previously determined scaling of PS-PI interaction parameter (xodt

Fig. 51 Phase diagram for PS-PI diblock copolymer (Mn = 33 kg/mol, 31vol% PS) as function of temperature, T, and polymer volume fraction, cp, for solutions in dioctyl ph-thalate (DOP), di-n-butyl phthalate (DBP), diethyl phthalate (DEP) and M-tetradecane (C14). ( ) ODT (o) OOT ( ) dilute solution critical micelle temperature, cmt. Subscript 1 identifies phase as normal (PS chains reside in minor domains) subscript 2 indicates inverted phases (PS chains located in major domains). Phase boundaries are drawn as guide to eye, except for DOP in which OOT and ODT phase boundaries (solid lines) show previously determined scaling of PS-PI interaction parameter (xodt <P 1A and /OOT 0"1) dashed line dilution approximation (/odt From [162], Copyright 2000 American Chemical Society...
A phase diagram of the symmetric PS-fc-PI blended with PS homopolymer of shorter chain lengths was constructed by Bodycomb et al. [ 174]. The effect of blend composition on the ODT is shown in Fig. 56 along with the results of mean-field calculations. In analogy to MFT the addition of homopolymer decreases the ODT temperature for the nearly symmetric diblock copolymer. [Pg.204]

The ability of block copolymers to self-assemble into organized microdomain (MD) structures when the thermodynamic repulsion between the constituents is high enough seems to be fairly well understood. This is particularly true in the case of amorphous diblock copolymers where phase diagrams for particular systems have been successfully predicted and experimentally proven [1-5]. [Pg.15]


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See also in sourсe #XX -- [ Pg.237 ]




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