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Nature and relative contribution of luminescent species in the photodegradation of polyolefins
Author(s) -
Kuroda Hideyuki,
Osawa Zenjiro
Publication year - 1989
Publication title -
makromolekulare chemie. macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 0258-0322
DOI - 10.1002/masy.19890270106
Subject(s) - photodegradation , high density polyethylene , impurity , polyethylene , adsorption , luminescence , polymer , photochemistry , chemistry , materials science , catalysis , organic chemistry , photocatalysis , optoelectronics
Luminescent species observed in the polyolefins were mainly foreign impurities, i.e., polynuclear aromatics (PNA) adsorbed from an ambient atmosphere. The luminescent species adsorbed under normal atmospheric conditions and an equivalent amount of PNA did not affect the photodegradation of high‐density polyethylene (HDPE). On the other hand, the extracted precipitates from HDPE accelerated the photodegradation of the polymer and, also, 3‐octanone slightly accelerated it, but little effect was observed in 1‐icosene. Therefore, the activity of impurities on the photodegradation of HDPE can be expressed in the following order: Extracted precipitates >> C=sO > PNA ∞ ‐CH=CH 2