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Effect of solvent or hydrophilic polymer on the hydration melting behavior of polyacrylonitrile

✍ Scribed by Byung Ghyl Min; Tae Won Son; Byoung Chul Kim; Chul Joo Lee; Won Ho Jo

Publisher
John Wiley and Sons
Year
1994
Tongue
English
Weight
413 KB
Volume
54
Category
Article
ISSN
0021-8995

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✦ Synopsis

The effect of solvent, DMF, and hydrophilic polymer on the hydration melting behavior of Tae Kwang polyacrylonitrile-based copolymer (T-PAN) was investigated by DSC measurement. The melting temperature (T,) of T-PAN was sharply lowered by incorporating water under autogenous pressure, but leveled off above a critical water content: 23 wt %.

However, a n additional incorporation of DMF into the hydrated T-PAN further lowered the T,, even above the critical water content. On the other hand, addition of water-soluble poly (acrylic acid), poly (vinyl alcohol), and poly (ethylene glycol) or water-swellable starch to the hydrated PAN slightly raised the T,.

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