Diffusion of additives and plasticizers in poly(vinyl chloride): 4. A programmed temperature technique for the determination of the diffusion parameters of three dialkylphthalates |
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Authors: | PJF Griffiths KG Krikor GS Park |
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Affiliation: | Department of Applied Chemistry, UWIST, Cardiff CF1 3NU, UK |
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Abstract: | A programmed temperature technique has been developed for the measurement of the self-diffusion coefficients of additives in polymers. This has been applied to the diffusion of three dialkylphthalate plasticizers in poly(vinyl chloride). Values of the self-diffusion coefficients and the calculated activation energies obtained in this way have been compared with values previously obtained from measurements at constant temperature. It has been shown that the programmed temperature technique gives a very rapid method for the estimation of the activation energy of self-diffusion. |
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Keywords: | Programmed temperature change di-n-butylphthalate di-n-decylphthalate di-n-hexylphthalate poly(vinyl chloride) self-diffusion coefficient activation energy |
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