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Phase Behavior of Binary Blends of Four Different Waxes
Author(s) -
Jana Sarbojeet,
Martini Silvana
Publication year - 2016
Publication title -
journal of the american oil chemists' society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.512
H-Index - 117
eISSN - 1558-9331
pISSN - 0003-021X
DOI - 10.1007/s11746-016-2789-6
Subject(s) - wax , differential scanning calorimetry , beeswax , materials science , eutectic system , phase (matter) , polarized light microscopy , crystallization , miscibility , polymer chemistry , microstructure , analytical chemistry (journal) , chemistry , chromatography , organic chemistry , composite material , thermodynamics , optics , physics , polymer
The objective of this study was to investigate the phase behavior of binary blends of four waxes—beeswax (BW), paraffin wax (PW), sunflower wax (SFW), and rice bran wax (RBW)—using differential scanning calorimetry (DSC) and polarized light microscopy (PLM). Blends of BW/PW, RBW/PW, SFW/PW, SFW/RBW, SFW/BW, and RBW/BW were crystallized in a DSC, and their melting behavior was used to build binary phase diagrams. The microstructure of the crystalline networks formed in these blends was analyzed using PLM. BW/PW, SFW/PW, SFW/BW, and RBW/BW blends showed eutectic phase behavior, while RBW/SFW showed continuous solid solution and the RBW/PW blend showed monotectic behavior. Results from the box‐counting fractal dimension ( D b ) measurement of crystal morphology showed higher D b values for the 20 and 80 % wax blends, irrespective of crystallization temperature or wax type. D b values of single waxes decrease as temperature increases.