Cryogenic properties of engineering plastic films
The mechanical and dielectric properties of several engineering plastic films were measured at cryogenic temperatures. The tensile strength and elongation of polyethylene-2,6-naphthalenedicarboxylate at 77 K were found to decrease with an increase in the degree of crystallinity. The peak height of d...
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Published in | Cryogenics (Guildford) Vol. 35; no. 11; pp. 787 - 789 |
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Main Authors | , , |
Format | Journal Article Conference Proceeding |
Language | English |
Published |
Oxford
Elsevier Ltd
01.11.1995
Elsevier |
Subjects | |
Online Access | Get full text |
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Summary: | The mechanical and dielectric properties of several engineering plastic films were measured at cryogenic temperatures. The tensile strength and elongation of polyethylene-2,6-naphthalenedicarboxylate at 77 K were found to decrease with an increase in the degree of crystallinity. The peak height of dielectric loss around 230 K of this polymer also decreased with increasing degree of crystallinity, indicating that this peak is closely associated with motion in an amorphous region of the polymer. The cryogenic properties of two kinds of newly developed polyimide films were also studied. On the basis of the results obtained, the relationship between the chemical structures of polymers and their cryogenic properties are discussed. |
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ISSN: | 0011-2275 1879-2235 |
DOI: | 10.1016/0011-2275(95)90915-3 |