pet: A data frame of an degradation experiment of...

Description Usage Format Author(s) Source

Description

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.

Usage

1

Format

A 37 by 6 data frame of continuous variables:

YI

Yellowness index of PET film

Time

Time exposed to ASTM G-154 Cycle 4 conditions

AbsEdge

Fundamental Absorption Edge - Optical absorbance at 312 nm

UVStabBleaching

Ultraviolet Stabilizer Bleaching - Optical absorbance at 340 nm

Crystallization

IR spectropscopy peak of relative crystallinity - IR absorbance at 975 wavenumber

ChainScission

IR carbonyl peak - IR absorbance at 1711 wavenumber

Author(s)

Devin A. Gordon

Source

Solar Durability and Lifetime Extension (SDLE) Research Center, Case Western Reserve University


netSEM documentation built on May 2, 2019, 6:32 a.m.