Accession Number:

ADA523981

Title:

Physical Morphology and Quantitative Characterization of Chemical Changes of Weathered PVC/Pine Composites

Descriptive Note:

Journal article

Corporate Author:

IDAHO UNIV MOSCOW

Report Date:

2009-12-22

Pagination or Media Count:

9.0

Abstract:

This study investigated weathering effects on polyvinyl chloride PVC based wood plastic composites WPC, with a focus on the color and structure that is attributed to the material composition. It is directed towards quantifying the main chemical modifications, such as carbonyl and vinyl groups which are formed during weathering. These composites were subjected to three weathering regimes exterior, accelerated xenon-arc, and accelerated UVA. The change in color was monitored using colorimetry. Fourier transform infrared spectroscopy was used to identify and quantify the chemical modifications carbonyl formation and vinyl propagation due to weathering. Additionally, scanning electron microscopy was employed to observe the physical morphological changes that occurred. The results showed that exterior and accelerated xenon-arc and UVA weathering regimes increased the degree of lightness, total color change, carbonyl concentration, and wood loss on the surfaces of the weathered composites. The increased carbonyl concentration during weathering implied that degradation had occurred by oxidation process. Also, oxidation and lignin from the wood degradation influenced the color lightness of PVC based WPC upon weathering.

Subject Categories:

  • Geology, Geochemistry and Mineralogy
  • Plastics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE