Dynamic Moduli Of Fluorocarbon Compounds

Item

Title
Dynamic Moduli Of Fluorocarbon Compounds
Report Number
WL-TR-91-3078 Volume III, p. GDA-1
Creator
Reader, Wayne T.
Megill, Robert W.
Corporate Author
Vector Research Co., Inc.
E. J. Dupont de Nemours & Co.
Date
1991
Date Issued
1991-08
Extent
1
Identifier
ADA241313
Abstract
Viscoelastic polymers are frequently used to eliminate harmful or annoying noise fields in an environment which contains solvents or gases at elevated temperatures. The frequency range over which the particular polymer performs as a sound isolator, an absorber, or a damper may vary by orders of magnitude. Hence, a polymer family which is resistant to many common solvents and exhibits high loss factors distributed over several frequency decades covering the audio band should find many applications. Fluorocarbon elastomers such as copolymers of vinylidene flouride and hexafluoropropylene are such a family. Presented in this paper will be the results of an initial examination of the dynamic moduli, consisting of the elastic and loss components, of six different commercially available family members. The magnitude of the peak loss factor is found to vary between approximately 1.1 to 1.4, and its location by more than two decades in the frequency domain.
Description
Viscoelastic polymers are frequently used to eliminate harmful or annoying noise fields in an environment which contains solvents or gases at elevated temperatures. The frequency range over which the particular polymer performs as a sound isolator, an absorber, or a damper may vary by orders of magnitude. Hence, a polymer family which is resistant to many common solvents and exhibits high loss factors distributed over several frequency decades covering the audio band should find many applications. Fluorocarbon elastomers such as copolymers of vinylidene flouride and hexafluoropropylene are such a family. Presented in this paper will be the results of an initial examination of the dynamic moduli, consisting of the elastic and loss components, of six different commercially available family members. The magnitude of the peak loss factor is found to vary between approximately 1.1 to 1.4, and its location by more than two decades in the frequency domain.
Distribution Classification
1
Distribution Conflict
No
DTIC Record Exists
No
Illinois Tech Related
No
Photo Quality
Not Needed
Report Availability
Full text available
Type
article
Is Part Of
Proceedings of Damping '91: 13-15 February 1991 San Diego, California (GCA-1 through JCB-17)
Media
articleGDA

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Title Class
Proceedings of Damping '91: 13-15 February 1991 San Diego, California (GCA-1 through JCB-17)

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