Radius of gyration scaling in the semidilute regime

Book · Sat Dec 30 23:00:00 EST 1995

OSTI ID:225270

Barker, J G; Orts, W J ^[1]; Mayes, A M ^[2]; Briber, R M ^[3]

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1. National Inst. of Standards and Technology, Gaithersburg, MD (United States)
2. Massachusetts Inst. of Tech., Cambridge, MA (United States). Dept. of Materials Science and Engineering
3. Univ. of Maryland, College Park, MD (United States). Dept. of Materials and Nuclear Engineering

Small-angle neutron scattering is used to investigate swelling effects of polystyrene in carbon tetrachloride and cis-decalin in the semidilute regime. The observed scaling exponent m where R{sub g}{sup 2} {approximately} {phi}{sup {minus}m} was m = 0.15 {+-} 0.01 both in carbon tetrachloride and in cis-decalin at T = 180 C, which is much weaker than the theoretical prediction m = 0.25. A review of the literature has found the scaling exponent to vary from 0.1 to 0.25. Possible causes for this variation in the observed scaling exponent are discussed.

• OSTI ID: 225270
• Report Number(s): CONF-941144--; ISBN 1-55899-278-2
• Country of Publication: United States
• Language: English

Related Subjects

40 CHEMISTRY
DIAGNOSTIC TECHNIQUES
EXPERIMENTAL DATA
MOLECULAR STRUCTURE
MOLECULAR WEIGHT
NEUTRONS
POLYSTYRENE
SCALING LAWS
SMALL ANGLE SCATTERING
SOLVENT PROPERTIES
SWELLING