Phenylethynyl-Terminated Polyimide Oligomers with Low Viscosity and Good Thermal Properties

Abstract:

A series of addition-type imide oligomer (degree of polymerization: n=1-9) derived from 2,3,3',4'-diphenyl ether tetracarboxylic acid dianhydride (a-ODPA), 3,4'-oxydianiline (3,4'-ODA) and 4-phenylethynylphthalic anhydride (PEPA) was synthesized by thermal imidization. The resultant oligomers were characterized for their chemical architecture, thermal property, and processability. The experimental results showed that oligomers PI-1 and PI-2 had somewhat crystalline phase. PI-4, PI-6 and PI-9 exihibited high solubility in solvents. These imide oligomers have a very low melt viscosity, and thus provide wide processing window by the rheological behaviors. Furthermore, the cured polyimides exhibited excellent thermal stability under N₂ atmosphere. The temperatures of 5% weight loss in N₂ atmosphere were all above 524°C.

• Periodical: Materials Science Forum (Volume 848)
• Pages: 167-173
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.848.167
• Online since: March 2016
• Authors: Ping Yu, Yan Wang, Jun Rong Yu, Jing Zhu, Zu Ming Hu
• Keywords: Imide Oligomer, Processability, Thermal Property

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