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| THE DETERMINATION OF DIFFUSIVITY OF MEDIA INTO POLYMERS BY ELECTRICAL RESISTANCE MEASUREMENTS |
| Li Guolai Zhu Yong Song Chengqian Wu Zhiying Xu Xinnian (East China Institute of Chemical Technology) |
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Abstract It is shown that the penetration of chemicals into polymers can be eva- luated by the change of electrical resistance of exposed polymers.Results of bisphenol A unsaturated polyester(323 resin)in 10% sodium chloride and epoxy resin(E-44 resin)in 25% sulfuric acid as a function of temperature are in accord with Arrihenius equation.The time-dependence of diffusivity of sulfuric acid into E-44 resin can be described empirically by the formula: D=Ae~(at).The effect of concentration of sulfuric acid is rather complex:at lower concentrations,the diffusivity of acid into E-44 resin decreases with increasing concentration,which is governed mainly by physical diffusion, while at concentrations higher than 30%,an increase in diffusivity is obser- ved,which is attributed to chemical reactions.It seems that the technique described can be employed to monitor practical performance of plant equip- ments on account of its high accuracy and ease of operation.
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Received: 25 June 1983
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Cite this article:
Li Guolai Zhu Yong Song Chengqian Wu Zhiying Xu Xinnian (East China Institute of Chemical Technology). THE DETERMINATION OF DIFFUSIVITY OF MEDIA INTO POLYMERS BY ELECTRICAL RESISTANCE MEASUREMENTS. J Chin Soc Corr Pro, 1983, 3(3): 159-167.
URL:
https://www.jcscp.org/EN/ OR https://www.jcscp.org/EN/Y1983/V3/I3/159
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[1] #12
[2] C.D.Shirrell and J.Halpin,Composite Materials Testing and Design (4th Conference),ASTM STP617,514～528(1977)
[3] W、M、Groenewoud,J.of the Oil and Colour Chemists association,62,10～17(1979)
[4] A.C.Loos,et al.,J.Composite Materials,14,142 (1980) |
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