Abstract
Aromatic polyimide was synthesized by pyromellitic dianhydride (PMDA) and diamine with aromatic ether. An optimized compression molding process for producing high performance engineering plastics from aromatic polyimide was investigated. The plastics showed high thermal stability, excellent mechanical and electrical properties. The polyimide which was characterized by IR spectra, differential scanning calorimetry (DSC), thermogravimetric analysis (TGA) exhibited glass transition temperatures (Tg) at 270 °C, and 5% weight loss temperature at 537 °C. Additionally, a novel technology relating to the recovery of solvent under vacuum condition was proposed, and exhibited better mobility of powder and toughness of plastics, low costs and hydrolysis rate.
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