کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
675830 | 1459629 | 2006 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Phase behaviour of the binary mixtures of substituted analogues of LC compounds of the type 4-(4â²-substituted phenylazo)-1-naphthyl-4â³-alkoxybenzoates
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
جریان سیال و فرایندهای انتقال
پیش نمایش صفحه اول مقاله

چکیده انگلیسی
Binary mixtures made from components of the four series of the molecular structure 4-CnH2n+1O-C6H4-COO-C10H6-NN-C6H4-X, in which both components bear the same alkoxy group (n = 8, 10, 12, or 14) but of different substituent (X = CH3O, CH3, Cl, or NO2), were prepared and characterized for their phase behaviour. Transition temperatures of mixtures were measured by differential scanning calorimetry and identified by polarized-light microscopy. The dependence of the phase behaviour of mixed systems upon differences in the electronic nature of the terminal group, X, attached to both components as well as the length of the alkoxy group, was investigated from the phase diagrams constructed for the various binary combinations. The nematic order parameters are in accordance with the conclusions drawn.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Thermochimica Acta - Volume 449, Issues 1â2, 1 October 2006, Pages 61-66
Journal: Thermochimica Acta - Volume 449, Issues 1â2, 1 October 2006, Pages 61-66
نویسندگان
Refaat I. Nessim, Sayed Z. Mohamady, Ola R. Shehab, Magdi M. Naoum,