The data set is a study of photolysis and hydrolysis of poly(ethylene-terephthalate) films that contain an ultraviolet stabilizer additive. In this work, polymeric samples were exposed to UV light and moisture according to ASTM G-154 Cycle 4 standard accelerated weathering conditions. Resulting optical chemical changes were determined through optical and infrared (IR) spectroscopy. *Time* is the main exagenous variable and *YI* (yellowness index) is the endogenous variable (response). The other columns in the data set (*AbsEdge*, *UV.Stab.Bleaching*, *Crystallization*, and *ChainScission*) are values extracted from optical and IR absorbance spectra as single metrics and used as intermediate unit level endogenous (response) variables in the netSEM analysis.
A 37 by 6 data frame of continuous variables:
Yellowness index of PET film
Time exposed to ASTM G-154 Cycle 4 conditions
Fundamental Absorption Edge - Optical absorbance at 312 nm
Ultraviolet Stabilizer Bleaching - Optical absorbance at 340 nm
IR spectropscopy peak of relative crystallinity - IR absorbance at 975 wavenumber
IR carbonyl peak - IR absorbance at 1711 wavenumber
Devin A. Gordon
Solar Durability and Lifetime Extension (SDLE) Research Center, Case Western Reserve University
Add the following code to your website.
For more information on customizing the embed code, read Embedding Snippets.