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Preparation and properties of new polyimides derived from 1,6-diaminodiamantane

โœ Scribed by Yaw-Terng Chern

Publisher
John Wiley and Sons
Year
1996
Tongue
English
Weight
460 KB
Volume
34
Category
Article
ISSN
0887-624X

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โœฆ Synopsis

SYNOPSIS

New polyimides containing diamantane units were prepared by a conventional two-step method starting from 1,6-diaminodiamantane and aromatic dianhydrides. The intermediate poly(amic acid)s had inherent viscosities of 0.33-0.55 dL/g. These polyimides did not decompose below 400ยฐC in air or nitrogen atmosphere, and the temperature at 5% weight loss were above 491ยฐC. The glass transition temperatures of the polyimides were found to be 375-429ยฐC by DSC. These polyimides had almost the same semicrystalline patterns and exhibited crystalline diffraction peak (2 0) at around 15". The polyimide Vb exhibited a melting endothermic peak at 514ยฐC.

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