Thermochromism of polypropylene gels |
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Authors: | H. Fujimatsu S. Kuroiwa |
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Affiliation: | (1) Present address: Department of Chemical Engineering, Faculty of Textile Science and Technology, Shinshu University, Japan |
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Abstract: | It is found that polypropylene gels in some solvents of benzene-derivatives show a striking change of colour. The colour changes from blue to yellow as the temperature rises from the melting point of the solvent to around 70–80 °C. The apparent characteristic of the phenomenon resembles the thermochromism of cholesteric liquid crystals although polypropylene itself is colourless and has no asymmetric carbons in the molecules. Polypropylene flakes swelled in these solvents also show similar thermochromism. |
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Keywords: | Thermochromism polypropylene gel benzene toluene |
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