Determination of the molecular weight of polyvinyl alcohol by viscosity.
Written in 2001; 1,244 words; 2 sources; $ 42.95
From the Paper:
"Cleaved and uncleaved solutions of PVOH were involved in viscosity measurements. These measurements were undertaken so as to determine the molecular weight of the PVOH solutions. The apparatus constant for the Ostwald viscometer was calculated to be 1.435 x 10-4. The specific viscosity was also determined and used to plot graphs of hsp/c vs. c, and 1/c ln h/ho vs. c. From these plots the intrinsic viscosity was extrapolated to a concentration of zero.
The values of the molecular weights were averaged and reported for both the uncleaved and cleaved product. The values obtained for Mv were 26,731.3 g/mol and 4615.4 g/mol, respectively. The values obtained for Mn were 14145.6 g/mol and 2442 g/mol, respectively. The values obtained for D for all the graphs was 5.89 x 10-3."
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