First, it could be formed from the polycondensation of dimethyl adipate and ethylene glycol mixed in equal amounts and subjected to increasing temperatures (100 °C, then 150 °C, and finally 180 °C) under nitrogen atmosphere.
[11] The bands formed by PEA have been said to resemble corrugation, much like a butterfly wing or Pollia fruit skin.
[14] Conductivity of films made of PEA mixed with salts was found to exceed that of PEO4.5LiCF3SO3 and of poly(ethylene succinate)/LiBF4 suggesting it could be a practical candidate for use in lithium-ion batteries.
[15] Notably, PEA is used as a plasticizer and therefore amorphous flows occur at fairly low temperatures rendering it less plausible for use in electrical applications.
Blends of PEA with polymers such as poly(vinyl acetate) showed improved mechanical properties at elevated temperatures.
[6] Miscibility is determined by the presence of only a single glass transition temperature being present in a polymer mixture.
Neat PEA has been shown to have a slightly lower degradation rate than copolymers due to a loss in crystallinity.
[3] Further work has shown that decreasing crystallinity is more important to degradation carried out in water than whether or not a polymer is hydrophobic or hydrophilic.
[21] Poly(ethylene adipate) urethane combined with small amounts of ligin can aid in preventing degradation by acting as an antioxidant.
This is thought to be due to the rigid nature of ligin which aids in reinforcing soft polymers such as PEA urethane.
Observing the changes in thermal expansion coefficient allowed for the increasing in plasticity to be determined for this copolymer blend.
Furyl-telechelic poly(ethylene adipate) (PEAF2) and tris-maleimide (M3) can be combined through a DA reaction in order to bring about self-healing capabilities in PEAF2.
Microbeads were placed into a variety of solutions including a synthetic stomach acid, pancreatin, Hank's buffer, and newborn calf serum.
[5] The degradation of the microcapsules and therefore the release of the drug was the greatest in newborn calf serum, followed by pancreatin, then synthetic stomach acid, and lastly Hank's buffer.
The enhanced degradation in newborn calf serum and pancreatin was attributed to the presence of enzyme activity and that simple ester hydrolysis was able to be carried out.