DYNAMIC PARAMETERS FOR SOME POLY(NORMAL-ALKYL METHACRYLATES)

The dielectric relaxation data of poly (n‐hexyl methacrylate) and poly (n‐octyl methacrylate) by Strella and Chinai are represented in terms of the relaxation function proposed by Havriliak and Negami using the multiresponse techniques developed by Havriliak and Watts to evaluate the parameters and their dependence on temperature. The parameter α which represents the width of the distribution of relaxation times was found to be dependent on temperature whereas the parameter β representing the skewness of the distribution function was found to be independent of temperature. The relaxation process parameters are discussed in terms of Mansfield's jump model. Copyright © 1990 John Wiley & Sons, Inc.