Effect of the Solvent Composition on the Content of the Crystalline Phase and Melting Temperature of Paraffin Waxes

2020 ◽  
Vol 93 (4) ◽  
pp. 603-610
Author(s):  
I. K. Ivanova ◽  
V. A. Kashirtsev ◽  
M. E. Semenov ◽  
Yu. S. Glyaznetsova ◽  
O. N. Chalaya ◽  
...  
Keyword(s):  
Melting Temperature ◽  
Crystalline Phase ◽  
Solvent Composition ◽  
Paraffin Waxes

Observation of Novel Liquid-Crystalline Phase above the Bulk-Melting Temperature

2003 ◽  
Vol 90 (21) ◽  
Author(s):  
Keshav S. Gautam ◽  
Satyendra Kumar ◽  
Didier Wermeille ◽  
Doug Robinson ◽  
Ali Dhinojwala
Keyword(s):  
Melting Temperature ◽  
Crystalline Phase ◽  
Liquid Crystalline ◽  
Liquid Crystalline Phase

scholarly journals On orientation memory in high density polyethylene – carbon nanofibers composites

e-Polymers ◽  
2017 ◽  
Vol 17 (4) ◽  
pp. 303-310 ◽  
Author(s):  
Mircea Chipara ◽  
Brian Jones ◽  
Dorina M. Chipara ◽  
Jianhua Li ◽  
Karen Lozano ◽  
...  
Keyword(s):  
Melting Temperature ◽  
Carbon Nanofibers ◽  
Crystalline Phase ◽  
High Density Polyethylene ◽  
Room Temperature ◽  
Uniaxial Stress ◽  
High Density ◽  
Two Dimensional ◽  
Uniaxial Stretching ◽  
X Ray

AbstractAn orientation memory effect in high density polyethylene (HDPE) filled with vapor grown carbon nanofibers (VGCNF) is reported. Two-dimensional X-ray (2DXR) confirmed the reorientation of HDPE crystallites upon the uniaxial stretching of HDPE and HDPE filled by VGCNFs. This anisotropy of 2DXR spectra was decreased by heating all stretched samples (loaded or not loaded by VGCNFs) from room to the melting temperature of HDPE. Upon cooling these samples to room temperature, it was noticed that only the nanocomposite retained a weak partial (uniaxial) order, while HDPE showed a completely isotropic 2DXR spectrum. It was concluded that during the stretching of nanocomposites the crystallites and VGCNFs were aligned along the uniaxial stress. Upon heating, the crystalline phase was melted, while the orientation of the VGCNFs was not significantly disturbed. The recrystallization of the polymer started preferentially from the VGCNF – polymer interphase, resulting into an anisotropic crystalline structure.

Crystallization Kinetics and Microhardness of MgO–Al2O3–SiO2 Glass Ceramics with Low Melting Temperature

2014 ◽  
Vol 1023 ◽  
pp. 39-42
Author(s):  
Qiang Lu ◽  
Shu Jiang Liu
Keyword(s):  
Melting Temperature ◽  
Crystalline Phase ◽  
Annealing Temperature ◽  
Glass Ceramics ◽  
Calorimetric Study ◽  
Strong Impact ◽  
Phase Sequence ◽  
Main Crystalline Phase ◽  
High Quartz ◽  
Glass Compositions

The authors report a deferential scanning calorimetric study of MgO–Al2O3–SiO2glasses which possess low melting temperature due to introduction of some quantity of B2O3, Li2O and CaF2. It is shown that the content of Li2O has a strong impact on the overlapping extent of the rates of nucleation and crystal growth. High-quartz tends to precipitate at low temperature (~1173 K) for the studied glasses, irrespective of Li2O content. With increasing annealing temperature, spodumene and cordierite form as main crystalline phase for the samples with high and low Li2O content, respectively, and then cristobalite crystals occur for both glass compositions. Microhardness firstly increases and then decreases, depending on crystalline phase sequence, and a maximum microhardness value is obtained to be 10.5 GPa.

Gas permeability of polydimethylsiltrimethylene above and below the melting temperature of the crystalline phase

2006 ◽  
Vol 48 (10) ◽  
pp. 1128-1132 ◽  
Author(s):  
L. E. Starannikova ◽  
Yu. P. Yampolskii ◽  
N. V. Ushakov
Keyword(s):  
Melting Temperature ◽  
Crystalline Phase ◽  
Gas Permeability

Compliance with Amended General Chapter USPMelting Range or Temperature

2019 ◽  
Author(s):  
Samuele Giani ◽  
Naomi M. Towers
Keyword(s):  
Melting Temperature ◽  
Reference Standards ◽  
Melting Range ◽  
Primary Reference ◽  
General Chapter ◽  
Regulation Compliance

Laboratories measuring melting temperature according to USP<741> Melting Range or Temperature, must comply with the amended calibration and adjustment requirements described in this regulation. Compliance is ensured by adjusting the instrument with secondary reference standards, traceable to USP, followed by verification of accuracy using USP primary reference standards.

INDALLOY 136

Alloy Digest ◽  
1981 ◽  
Vol 30 (5) ◽  
Keyword(s):  
Physical Properties ◽  
Tensile Properties ◽  
Melting Temperature ◽  
Eutectic Alloy ◽  
Heat Treating

Abstract INDALLOY 136 is a bismuth-base, eutectic alloy that melts at 136 F (57.8 C). It is used widely in industry because of its low melting temperature and controlled-shrinkage characteristics. It provides the scientist, engineer and technician with an easily castable material that is ready for use soon after it freezes. The alloy can be recovered easily and recycled into new uses any number of times. Among its uses are anchoring parts for machining, proof casting and low-melting solder. This datasheet provides information on composition, physical properties, hardness, and tensile properties. It also includes information on casting, heat treating, and machining. Filing Code: Bi-24. Producer or source: Indium Corporation of America.

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