Plasticizers high energy oxidizing

High energy oxidizing plasticizers such as nitroglycerine (NG-glyceryl trinitrate) to increase performance. 

Like almost all synthetic polymers, styrene plastics ate susceptible to degradation by heat, oxidation, uv radiation, high energy radiation, and shear, although... 

Like almost all synthetic polymers, styrene plastics are susceptible to degradation by heat, oxidation, uv radiation, high energy radiation, and shear. However, in normal use, only uv radiation imposes any real limit on the general usefulness of these plastics (139,140). Thus, it is generally recommended that the use of styrene plastics in outdoor applications be avoided. 

Sterilization is required for most medical devices in order to prevent delivery of pathogenic organism. Commbn sterilization methods for disposable plastic syringes are exposure to ethylene oxide gas or exposure to high energy radiation, such as an electron beam or y-radiation from a Co source (67). Such treatments have the potential to alter the friction properties of a syringe as will be discussed briefly in this contribution. 

Nevertheless, surface tensions are related to wetting phenomena. Roughly, a hquid will wet a solid if its surface tension is lower than that of the sohd (Ti < Ys)- High energy surfaces like clean metals, glass, ceramics and metal oxides are much easier to wet than plastic (polymer) surfaces. Wetting becomes more difficult when there are adsorbed liquids or contaminations as the surface energy is reduced. Solid... 

---