Pets crystallography

In materials science, crystallography is used to observe phase transitions effected by environmental changes, like pressure and temperature 1, 2

High-quality X-ray data can be used to distinguish between light atoms, such as C, N and O, and can allow location of H atoms to confirm the protonation state of a molecule

X-ray crystallography has long been used as a powerful technique to determine the three dimensional molecular structure of small molecule compounds and biological macromolecules at atomic resolution

We have developed a series of X-ray diffractometers, which enables researchers to provide structures of crystals of a few microns in size

Because of the high melting point (ca

255°C) and glass transition temperature (ca

7O°C), PET retains its good mechanical properties at temperatures up to 175°C

It is a semi-crystalline polymer composed of crystalline and amorphous regions

A great variety of microstructures can be developed in PET by changing the crystallization conditions