Synthesis and Properties of Ppo-Modified Polyurethanes

Abstract

A hydroxyethyl-terminated low-molecular weight poly(2,6-dimethylphenylene oxide) (PPO), PPOD, was used as a polyol to modify conventional TDI-based polyurethanes. Dynamic mechanical analysis indicates that increasing PPOD content in polyurethanes can raise the glass transition temperature (Tg) of the soft segment. With the incorporation of 20% PPOD in PPG-TDI and PTMEG-TDI polyurethanes, the Tg increased by approximately 27 °C and 39 °C, respectively. The tensile strength and hardness are also affected by the incorporation with PPO segment. Furthermore, the presence of PPO segments in polyurethanes affects the dielectric property, resulting in lower dielectric constant and dielectric loss.

Keywords: Polyphenylene etherPolyurethaneThermal property Dielectric property