The effect of photodegradation on effective properties of polymeric thin films: A micromechanical homogenization approach
作者： Chao Zhang , Natalie Waksmanski , Vincent M. Wheeler , Ernian Pan , Ross E. Larsen
DOI: 10.1016/J.IJENGSCI.2015.04.006
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摘要: Abstract An analytical model is developed to study the impact of photodegradation on elastic properties polymeric thin films. The multi-phase heterogeneous aged polymer material considered as a two-phase functionally graded with varying volume ratios functions both time and depth. concentration gradations are obtained using three-species chemical kinetic kinetics being driven by light that absorbed it passes through film. Concentration connected stiffness averaging micromechanics approach employed find effective composites. Concise matrix expressions presented. derived formulas applied responses an simply-supported film under surface loads. results then compared validated those from multi-layer model. present also predict evolution photodegradation, variation solution could be useful in studying relation between molecular structure mechanical properties, evaluation long-term structures.
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