Application of the perturbed-elastic-rod model to the longitudinal acoustical modes of poly(oxyethylene)s and their n-hexadecyl ethers
Abstract
The LAM-1 frequencies of low-molecular-weight poly(oxyethylene) dimethyl and diethyl ethers and methyl-n-hexadecyl ethers are interpreted by modelling the chain molecules as elastic rods perturbed by end masses and end forces. In the case of the n-hexadecyl ethers the important factor is the damping effect of the alkyl block acting as an inertial mass.