APPLICATION OF GROUP CONTRIBUTION ANALYSIS TO THE HAVRILIAK-NEGAMI MODEL

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Authors
  1. Szabo, J.P.
  2. Davis, W.M.
Corporate Authors
Defence Research Establishment Atlantic, Dartmouth NS (CAN)
Abstract
Group contribution analysis (GCA) has been applied to many of the physical properties of polymers in the past. In this paper, GCA has been applied for the first time to the frequency dependent complex modulus of polymeric materials, which may be described in terms of the Havriliak-Negami (H-N) equation. This approach has been tested on a set of polyurethanes for which the H-N parameters have been uniquely determined. It has been shown that the dynamic mechanical behaviour of polymers may be described in terms of group additive relationships, at least for the 14 polyurethanes and 9 structural groups which were studied here. The derived group coefficients were sometimes negative or outside of acceptable bounds, a problem which may be addressed in future work by a careful selection of the monomers and structural groups included in the analysis.
Keywords
Havriliak-Negami Model;Polymer modelling;Group Contribution Analysis;Dynamic Mechanical Properties;Glass transition temperatures;Group Interaction Modelling;Dynamic mechanical properties
Report Number
DREA-TM-98-228 — Technical Memorandum
Date of publication
01 Oct 1998
Number of Pages
31
DSTKIM No
99-00272
CANDIS No
510194
Format(s):
Hardcopy;Document Image stored on Optical Disk

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