Polymer Conformation near the Critical Point of a Binary Mixture

Title
Polymer Conformation near the Critical Point of a Binary Mixture
Authors
Choi, HJ.
Keywords
LIGHT-SCATTERING, VISCOSITY
Issue Date
1998-01
Publisher
AMERICAN PHYSICAL SOC
Abstract
Conformation of a flexible linear polymer (polyacrylic acid, PAA) in a binary mixture (writer + 2,6-lutidine, LW) near the critical point of LW is studied using dynamic light scattering (DLS) by which the diffusivities of the polymer molecules and the critical composition Fluctuation of the LW are measured. The DLS measurements, supplemented by viscosity data, show that the PAA molecule in LW shrinks when approaching the critical point of LW. At temperature T close to the critical temperature T-c. when the correlation length xi of LW is comparable to the intermolecular distance of PAA, me find that xi proportional to (1 - T/T-c)(-r) with v = 0.44 +/- 0.03 which is smaller than v = 0.60 of pure LW.
URI
http://dspace.inha.ac.kr/handle/10505/20343
ISSN
0031-9007
Appears in Collections:
College of Engineering(공과대학) > Polymer Science and Engineering (고분자공학) > Journal Papers, Reports(고분자공학 논문, 보고서)
Files in This Item:
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