Date of Award
Spring 1978
Document Type
Thesis
Department
Mechanical & Aerospace Engineering
Program/Concentration
Engineering Mechanics
Committee Director
John M. Kulman
Committee Member
Stephen G. Cupschalk
Committee Member
Howard L. Price
Committee Member
A. Sidney Roberts
Call Number for Print
Special Collections; LD4331.E57W34
Abstract
Temperature effects on the viiscosity of an epoxy resin (diglycidyl ether of bisphenol A - DGEBA), an elastomer (carboxy terminated butadiene acrylonitrile - CTBN), and two blends containing nominally 10 percent elastomer were examined from strain rates of 0.1 sec-1 to 10,000 sec-1 over a temperature range from 300K to 450K. All results indicated the greatest drop in viscosity occurred for each of the materials over the temperature range of 300K to 350K. In addition, the materials exhibited Newtonian responses over the entire strain rate range, Adding small amounts of elastomer to the I epoxy only moderately effected the viscosity, whereas the catalyst, triphenylphosphine, added to one of the blends did not measurably change the viscosity. Activation energies over the test temperature range were calculated using the Arrhenius relationship between viscosity and inverse temperature. Two distinct activation energies were found for each material in the temperature ranges 300K to 350K and 400K to 450K, indicating the existence of two different molecular flow mechanisms in these two temperature ranges.
Rights
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DOI
10.25777/5k9m-zg22
Recommended Citation
Wagner, Woodrow W..
"Temperature and Time Dependent Viscosity of an Elastomer Modified Epoxy Resin"
(1978). Thesis, Old Dominion University, DOI: 10.25777/5k9m-zg22
https://digitalcommons.odu.edu/mae_etds/738