INVESTIGATION OF THE DEGRADATION OF COMMERCIAL POLYOXYMETHYLENE COPOLYMER IN WATER SERVICE APPLICATIONS


ONER M. , WHITE D.

POLYMER DEGRADATION AND STABILITY, vol.40, no.3, pp.297-303, 1993 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 40 Issue: 3
  • Publication Date: 1993
  • Doi Number: 10.1016/0141-3910(93)90135-6
  • Title of Journal : POLYMER DEGRADATION AND STABILITY
  • Page Numbers: pp.297-303

Abstract

An investigation has been carried out on the influence of degradation on various properties of commercial polyoxymethylene (POM) copolymer fittings in chlorinated cold water service lines. Scanning electron microscope (SEM) was used to document interior bulk morphological changes and typical defects. The various types of irregular cracks and pits were observed at the innerface of the samples. DSC and intrinsic viscosity determination were carried out for investigation of crystallinity and molecular weight changes. It was seen that the crystallinity of the POM increases at a much higher rate at the inner surface layers than the outer layer in the used samples. The FT-IR spectra of the new and used samples indicate the extent of degradation of the samples.