Two samples with narrow molecular weight distributions are prepared of a new polymer. Some measurements are made in acetone and in hexane. sample A in acetone have Mn (osmotic pressure) 85000 Sample A Acetone, 25°C Parameter Second viral coeff. Intrinsic viscosity Intrinsic viscosity 0 0.87 dl/g 1.25 dl/g sample B not run 1.32 dl/g 2.05 dl/g Hexane, 25°C (a) What is the Mn of sample B? (b) What are the Mark-Houwink-Sakurada parameters (K' and a) acetone and in hexane?

Two samples with narrow molecular weight distributions are prepared of a new polymer. Some measurements are made in acetone and in hexane. sample A in acetone have Mn (osmotic pressure) 85000 Sample A Acetone, 25°C Parameter Second viral coeff. Intrinsic viscosity Intrinsic viscosity 0 0.87 dl/g 1.25 dl/g sample B not run 1.32 dl/g 2.05 dl/g Hexane, 25°C (a) What is the Mn of sample B? (b) What are the Mark-Houwink-Sakurada parameters (K' and a) acetone and in hexane?

Chemistry by OpenStax (2015-05-04)

1st Edition

ISBN:9781938168390

Author:Klaus Theopold, Richard H Langley, Paul Flowers, William R. Robinson, Mark Blaser

Publisher:Klaus Theopold, Richard H Langley, Paul Flowers, William R. Robinson, Mark Blaser

Chapter10: Liquids And Solids

Section: Chapter Questions

Problem 20E: The density of liquid NH3 is 0.64 g/mL; the density of gaseous NH3 at STP is 0.0007 g/mL. Explain...

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Two samples with narrow molecular weight distributions are prepared of a new polymer. Some measurements are made in acetone and in hexane.
sample A in acetone have Mn (osmotic pressure) 85000
Sample A
Acetone, 25°C
Parameter
Second viral coeff.
Intrinsic viscosity
Intrinsic viscosity
0
0.87 dl/g
1.25 dl/g
sample B
not run
1.32 dl/g
2.05 dl/g
Hexane, 25°C
(a) What is the Mn of sample B?
(b) What are the Mark-Houwink-Sakurada parameters (K' and a) acetone and in hexane?

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