Polydimethylsiloxane: Optical properties from 191 to 1688-nm (0.735-6.491-eV) of the liquid material by spectroscopic ellipsometry
Polydimethylsiloxane (PDMS) is an important polymer with numerous applications. Herein, the authors report the optical function(s) of PDMS from 191 to 1688ânm as determined from reflection spectroscopic ellipsometry (SE) and transmission ultraviolet-visible data. Two commercial samples of liquid PDMS (PDMS700 and PDMS2000) with molecular weights of 700â1500âg/mol and 2000â3500âg/mol, respectively, were analyzed. Both samples were linear polymers terminated with silanol groups. The optical functions determined from the two materials were essentially identical.