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Fast process in glass-forming polymers and its relation to mechanical properties

✍ Scribed by T Kanaya; J Hansen; I Tsukushi; K Nishida; K Kaji; O Yamamuro; K Tanaka; A Yamaguchi

Publisher: Elsevier Science
Year: 1999
Tongue: English
Weight: 102 KB
Volume: 60
Category: Article
ISSN: 0022-3697
DOI: 10.1016/s0022-3697(99)00117-1

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✦ Synopsis

We report the quasielastic neutron scattering results on an amorphous polyimide below the glass transition temperature T g ( 523 K). The so-called fast process in picosecond order has been observed far below T g . We also performed dynamicmechanical measurements at 10 Hz to find that the b-relaxation temperature is close to the onset temperature of the fast process although the difference in the frequencies in both the measurements are more than ϳ10 10 Hz.

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