ISSN:
0021-8995
Keywords:
Chemistry
;
Polymer and Materials Science
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
,
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
,
Physics
Notes:
An analysis of the parameters involved in torsional braid measurements is given. It is found that the amount of polymer on the braid controls the level of rigidity modulus attained by the composite specimen, but does not affect the measured glass transition temperature of the polymer. Treating the torsional braid system as a fabric braid filled polymer system, an empirical relation is given relating the measured modulus, G, to the modulus of the unfilled polymer, G0, and the volume fractions of voids, ϕv and support ϕs. This equation takes the form, \documentclass{article}\pagestyle{empty}\begin{document}$$ G/G_0 {\rm } = {\rm [1 } + {\rm (}k_s \phi _s {\rm } + {\rm }k_v \phi _v )]/[1 - (S_s ^\prime \phi _s + S_v ^\prime \phi _v )]^2 $$\end{document} where ks, kv, Ss′, and Sv′ are constants. This equation is evaluated for the polystyrene-cotton thread system. The effect of braid length on the measured modulus is discussed.
Additional Material:
3 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/app.1963.070070223
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