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PubMed · 15216388

Two-dimensional diffraction study of ice crystallisation in polymer gels.

Norio Murase·Satoru Abe·Hiroshi Takahashi·Chihiro Katagiri·Takumi Kikegawa
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Abstract

Ice crystallisation in crosslinked dextran (Sephadex) gels was studied by the method of two-dimensional X-ray diffraction (XRD) in combination with the simultaneous measurement of differential scanning calorimetry (DSC). With a Sephadex G25 gel where an exotherm due to ice crystallisation is observed in the DSC rewarming trace, it was indicated by the XRD pattern that small ice crystals less than approximately 10 microns in diameter are readily formed during freezing, and that the endothermic trend prior to the exotherm is not due to the glass transition but due to the melting of the small ice crystals. Moreover, the diffraction pattern observed with frozen Sephadex gels depended on the density of crosslink indicating that ice crystals of different size and dimension are formed in the gels.

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CrystallizationCrystallography, X-RayFreezingGelsIceKineticsPolymersJournal ArticleResearch Support, Non-U.S. Gov't

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Norio Murase, Satoru Abe, Hiroshi Takahashi, Chihiro Katagiri, Takumi Kikegawa. Two-dimensional diffraction study of ice crystallisation in polymer gels.. https://pubmed.ncbi.nlm.nih.gov/15216388/

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