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High Performance Polymers
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Novel Soluble Ethynyl-Terminated Ester-Imide Prepolymers: Their Syntheses and Characteristics

Hiroyuki Furutani

Kaneka Corporation, Electronic Materials R&D Department, Ohtsu, Shiga 520-0104, Japanfurutani{at}elec.kaneka.co.jp

Junya Ida

Koichiro Tanaka

Hirosaku Nagano

Kaneka Corporation, Electronic Materials R&D Department, Ohtsu, Shiga 520-0104, Japan

Novel soluble ester-imide prepolymers consisting of bisphenol-A bis(trimellitate) dianhydride (ESDA), aromatic diamine, and 3-ethynylaniline(3-EA) as the thermosetting groups were synthesized. The prepolymers were quite soluble in DMAc, DMF, m-cresol, NMP, CHCl3, and THF. The Tg’s of the various prepolymers were from 200 to 250 °C. The properties of the cured resins of the prepolymers were evaluated, and showed a range of cured Tg’s from 262 to 285 °C and flexural strengths of 112–138 MPa. A low moisture absorption of 0.45% and a low dielectric constant of 3.1 were also observed. Properties of glass-cloth-reinforced composites using the ester-imide prepolymers as the matrix resin were evaluated, and excellent mechanical and thermal properties were observed. An SEM photograph of a cross section of either the cured resin or the glass-cloth-reinforced composite showed good resin flow. Synthesis and some molecular orbital energies of ESDA were also studied.

High Performance Polymers, Vol. 12, No. 4, 461-469 (2000)
DOI: 10.1088/0954-0083/12/4/301
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