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Mass diffusion of camphorquinone in poly(methyl methacrylate) hosts with different molecular weights

✍ Scribed by J. L. Xia; C. H. Wang

Publisher
John Wiley and Sons
Year
1990
Tongue
English
Weight
508 KB
Volume
28
Category
Article
ISSN
0887-6266

No coin nor oath required. For personal study only.

✦ Synopsis

Abstract

Diffusion coefficients of camphorquinone (CQ) and its photoproduct (CQP) in two poly(methyl metbacrylate) (PMMA) samples with different molecular weights are measured as a function of temperature. Above the glass transition, the temperature dependence is not Arrhenius and can be described by the Williams‐Landel‐Ferry equation. It is also shown that the difference in the temperature dependence of the diffusion coefficients of CQ in the two PMMA samples is attributable to the difference in glass transition temperatures.

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