Cyclic oxygen scavenging polymers for barrier applications
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Oxygen scavenging polymers have been shown to improve packaging properties by being incorporated into the matrix of the packaging material by blending, multi-layering, or a combination of both. Addition of a metal salt, photoinitiator, and ultraviolet irradiation to the oxygen scavenging polymer can greatly increase the oxygen scavenging kinetics. The research presented in this report investigates the oxygen uptake and capacity of two polymers with oxidizable pendent rings. The mass uptakes of the cyclic polymers were around 12 wt.% and 17 wt.% and fluctuated some depending on the amount of metal salt (cobalt neodecanoate) was present. It was also found that the cyclic polymers uptook as much as twice the number of oxygen atoms than commercially available 1,4-polybutadiene.