Orientation correlations in lamellar block copolymers

Macromolecules

Volumn 29, Issue 13, 1996, Pages 4675-4679

  Garetz, B A ^a   Balsara, N P ^a   Dai, H J ^a   Wang, Z ^a   Newstein, M C ^a   Majumdar, B ^b  

^a POLYTECHNIC UNIVERSITY   (United States)

^b 3M COMPANY   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

ANIONIC POLYMERIZATION; BLOCK COPOLYMERS; COOLING; CORRELATION METHODS; FUNCTIONS; GLASS TRANSITION; HEATING; LIGHT SCATTERING; PERMITTIVITY; POLARIZATION; QUENCHING; TRANSMISSION ELECTRON MICROSCOPY;

CORRELATION LENGTHS; EXPONENTIAL FUNCTION; LAMELLAE; LAMELLAR ORIENTATION; ORIENTATION CORRELATIONS; THERMAL HISTORY;

CRYSTAL ORIENTATION;

EID: 0030172677     PISSN: 00249297     EISSN: None     Source Type: Journal    
DOI: 10.1021/ma9600724     Document Type: Article

References (18)

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14. We correct an error in eq 19 of ref 8b; the right-hand side of that equation should be multiplied by a factor of (1/2).
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16. A random number generator was used to choose one of eight directions: ±x̂, ±ŷ, and ±(x̂±ŷ).
17. To study the effect of continuous variation of lamellar orientation, depolarized light scattering profiles from "pairs" of lamellar grains with a fixed angle between the optic axes (ψ) were computed following the treatment given in ref 17. When ψ ≤ 20°, the calculated scattering patterns were nearly indistinguishable from that obtained from a single grain (ψ = 0); the maximum deviation was at q = 0, and it was less than 10%. When ψ = 30°, the maximum deviation was 20%. We thus conclude that light scattering is sensitive to changes in lamellar orientation that are in the vicinity of 30°, or larger.
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