Dynamics of semidilute polymer solutions

Conference · Sun Jan 01 00:00:00 EST 1978

OSTI ID:6645048

Schaefer, D W

This work confirms the salient features of the pseudogel model. The fundamental assumption that GAMMA scales has been verified as well as the M and K independence of GAMMA. The weakness of the model in failing to predict the shape of the correlation function and the scaling exponent x must lie either in an imprecise definition of the crossover concentration, c*, or in an improper analysis of what is actually measured in the light scattering experiment. Indeed, comparison of the semidilute data here and the dilute results of King, et al., indicates that the entanglement concentration c* scales as c/sup -1/./sup 4/ in disagreement with the prediction of c/sup -0/./sup 8/. Similar difficulties have been observed by Munch et al. in comparing c* in different solvents.

• Research Organization: Sandia Labs., Albuquerque, NM (USA)
• DOE Contract Number: EY-76-C-04-0789
• OSTI ID: 6645048
• Report Number(s): SAND-78-1039C; CONF-780902-2
• Resource Relation: Conference: American Chemical Society meeting, Miami, FL, USA, 10 Sep 1978
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
ORGANIC POLYMERS
BROWNIAN MOVEMENT
POLYSTYRENE
CORRELATION FUNCTIONS
GELS
SCATTERING
SOLUTIONS
VISIBLE RADIATION
COLLOIDS
DISPERSIONS
ELECTROMAGNETIC RADIATION
FUNCTIONS
MIXTURES
ORGANIC COMPOUNDS
PETROCHEMICALS
PETROLEUM PRODUCTS
PLASTICS
POLYMERS
POLYOLEFINS
POLYVINYLS
RADIATIONS
400301* - Organic Chemistry- Chemical & Physicochemical Properties- (-1987)