The effect of oxygen on the irradiation process of ethylene–butene copolymer

SSA study of early polyethylenes degradation stages. Effects of attack rate, of average branch length, and of backbone polymethylene sequences length distributions

“…The average molecular weight of the irradiated HPB in air atmosphere decreases with dose over the low dose range; irradiation with higher dose leads to an increase in molecular weight. The formation of a small amount of gel is observed at 84 kGy which grows in proportion with the dose [21,22]. Fig.…”

Gamma irradiated LDPE in presence of oxygen. Part I. Non-isothermal crystallization

“…The other goal was to obtain a global kinetic model for the analysis and design of real processing operations. It should be also pointed out that there are a great number of papers regarding the dynamical behavior of different types of irradiated polyethylenes [8,13,14] or the influence of oxygen present in the radiation process [15][16][17] but practically there are no works regarding the effect of oxygen on the nonisothermal crystallization process of irradiated polyethylene.…”

Thermal aging of acrylic-urethane network: Kinetic modeling and end-of-life criteria combined with mechanical properties

“…Acrylic-urethane network (AUN) is a well-known thermoset material used in a wide variety of commercial and technical applications; it is particularly prevalent as a coating for buildings and infrastructure, owing to its excellent flexibility, film-forming properties, and resistance to weathering [1]. The coatings applied to structure surfaces are exposed to several environmental stress factors, such as temperature [2], light [3], water [4], and oxygen [5,6]. They perform a significant role as a barrier material inhibiting the penetration of CO 2 , moisture and chloride ions to protect concrete and steel from corrosion and increase the durability of buildings and infrastructure [1,7,8].…”