The Effect of the Use of Full Body Harnesses on Their Protective Properties
A full body harness is a component of personal systems protecting against falls from a height. To ensure users’ safety, the harness must retain its protective properties during its whole service period. All the elements of a harness (webbings, threads, metal buckles, etc.) are exposed to destructive factors. Harnesses stored and used for a few years were tested. The paper discusses the most frequent types of damage and their effect on the essential resistance parameters. The effect of atmospheric conditions, sunlight, mechanical damage and dust on the parameters of webbings was tested. Conclusions on the main causes of the loss of the protective properties of harnesses are drawn; periodic checks of the physical conditions and guidelines for estimating acceptable service time are recommended.
Comparison of the UV-degradation chemistry of unstabilized and HALS-stabilized polyethylene and polypropylene
The UV-degradation of unstabilized and HALS-stabilized polyethylene (PE) and polypropylene (PP) is described. The degradations are characterized by measuring the oxygen uptake, the formation of CO and CO2, the FT-IR spectra, the mechanical properties and the oxygen content of the films. 
 
The oxygen uptake of the unstabilized polymers led to the expected changes in the IR-spectra and embrittlement of the films, while oxygen uptake by the HALS-stabilized PE and PP caused only minor changes. The results are explained assuming that the initiation of the photodegradation of PP and PE is due to charge transfer complexes.
Findings pertaining to polyethylene photooxidation
Etude de la cinetique et du mecanisme de la photolyse des hydroperoxydes formes lors de l'oxydation thermique de films polyethylene. Propositon de nouveaux mecanismes faisant intervenir surtout des reactions intermoleculaires rendant compte de la nature des produits obtenus et de leur cinetique de formation. Importance des reactions intramoleculaires qui conduisent a des ruptures de la chaine principale