Experimental chain dimensions for poly(ethylene terephthalate) (PET) at 275°C are given by (h?)o/M=0.90 Å² mol/g. Calculate Coo, the statistical segment length, and the persistence length for this polymer. Based on these numbers, is PET a flexible polymer, or not? What would you expect based on the molecular structure?

Experimental chain dimensions for poly(ethylene terephthalate) (PET) at 275°C are given by (h?)o/M=0.90 Å² mol/g. Calculate Coo, the statistical segment length, and the persistence length for this polymer. Based on these numbers, is PET a flexible polymer, or not? What would you expect based on the molecular structure?

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

See similar textbooks

Similar questions

Give a clear handwritten answer with explanation Give clear handwritten answer please....and give correct answer
7) Consider a solution of polymer molecules of length N. Find an expression for the overlap concentration c' for polymer in a theta solvent.
Discuss the reasons for the differences in glass transition temperature for the following pairs of polymers. Hint: check factors that affect Tg Poly(ethyl acrylate) (-24°C) and Poly(methyl methacrylate) (105°C)
How do contour length, root-mean-square separation, and radius of gyration of a random coil depend on the number of monomers and the dimensionality?
analyse this ir spectrum
Chemistry What is the chemical structure or compound based on the given IR spectrum?
A nuclcon is scattered elastically from a heavy nucleus. The effect of the heavy nucleus can be represented by a fixed potential -Vo r R, V (r) = where Vo is a positive constant. Calculate the deferential cross section to the lowest order in Vo.
Discuss in detail how SIMS and ISS give a mass spectrum of the surface. Compare and contrast the mechanisms.
1. Calculate the Coulombic (ionic) interaction energy between atoms for the C=O ∙∙∙H-N hydrogen bond in a peptide at a distance of 1.5Å in units of kJ/mol. Assume that the partial charge on O is −0.434, the partial charge on H is +0.417 and the permittivity of the protein environment is 6. 2. The dipole moment of an individual peptide group is approximately 3.46 D. Assuming that the dipoles line up linearly estimate the energy of interaction (in kJ.mol) of the hydrogen bond in Q1 using a dipole-dipole model.
If the number-average degree of polymerization (1/Xn) of a pure (undiluted) styrene is expressed by the equation below, the transfer constant to the monomer :(CM) and initiator (CI) will be
Indicate the expression that relates the angle of rotation of an optically active substance to its rotational power if the length of the measurement cell is 1. A) α = [a],0 c B) acλ = [a]Ⓡ C) a/ [a] = c D) a= [a]
22-30. (a) The mean free path is the average distance a molecule travels before colliding with another molecule. The mean free path, A, is given by A = kT/(V20P), where k is Boltzmann’s constant, T is temperature (K), P is pressure (Pa), and o is the collision cross section. For a molecule with a diameter d, the col- lision cross section is nd. The collision cross section is the area swept out by the molecule within which it will strike any other molecule it encounters. The magnetic sector mass spectrometer is maintained at a pressure of ~103 Pa so that ions do not collide with (and deflect) one another as they travel through the mass analyzer. What is the mean free path of a molecule with a diam- eter of 1 nm at 300 K in the mass analyzer?