Soluble and Colorless Polyimides from Alicyclic Diamines |
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| Authors: | Mi Hie Yi Wenxi Huang Kil-Yeong Choi |
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| Institution: | 1. Advanced Materials Division , Korea Research Institute of Chemical Technology , P O BOX 107 Yusong, Taejon, 305-600, Korea;2. Changchun Institute of Applied Chemistry , Chinese Academy of Sciences , Changchun, 130022, P R, China |
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| Abstract: | Abstract A series of novel polyimides was synthesized from alicyclic diamines and various aromatic dianhydrides by one-step polymerization in m-cresol without a catalyst. The polymerization was conducted for 4 hours with refluxing, which was enough to obtain the polymers with high molecular weight. The inherent viscosities of the resulting polyimides were in the range of 0.30 ～1.29 dL/g. The prepared polyimides showed excellent thermal stabilities and good solubility. All the polymers were readily soluble in common organic solvents such as chloroform, tetrachloroethane (TCE), dimethylacetamide (DMAc), etc and the glass transition temperatures were observed at 199 to 311°C. UV-visible spectra were obtained to measure the transparency of polymer films. All the polymers showed high transmission above 90% in the wavelength of 400 ～700 nm. |
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| Keywords: | Soluble Polyimides Colorless Alicyclic Diamine Good Solubility High Glass Transition Temperature Crystallinity Thermal Stability One-Step Polymerization Excellent Transparency |
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