The Published Fusion Enthalpy and its Influence on Solubility Estimation for Alcohols

In this work, UHMWPE reinforced composites containing hybrid zinc oxide (ZnO) and chitosan particles were prepared via the hot compression technique. The effect of ZnO contents (10, 20, 30 wt.%) and chitosan contents (1, 2, 3 wt.%) on the thermal properties of UHMWPE/ZnO and UHMWPE/Chitosan-ZnO reinforced composites were successfully investigated using DSC and TGA analysis, respectively. Based on DSC results, both UHMWPE/ZnO and hybrid composites did not record significant changes in the melting temperatures (Tm). The heat fusion enthalpy (Hm) and degree of crystallinity (Xc) of hybrid composites were found to be higher than UHMWPE/ZnO composites. As the TGA results shown, hybrid composites were also found to have higher thermal stability than UHMWPE/ZnO composites at 10 % and 50 % weight loss level. Overall, the UHMWPE/ZnO + 3 wt.% Chitosan hybrid reinforced composite recorded comparable mechanical properties and better thermal properties than neat UHMWPE.

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Pharmaceutical salts of emoxypine with dicarboxylic acids

Acta Crystallographica Section C Structural Chemistry ◽

10.1107/s2053229618007386 ◽

2018 ◽

Vol 74 (7) ◽

pp. 797-806 ◽

Cited By ~ 4

Author(s):

Alex N. Manin ◽

Alexander P. Voronin ◽

Ksenia V. Drozd ◽

Andrei V. Churakov ◽

German L. Perlovich

Keyword(s):

Density Functional Theory ◽

Density Functional ◽

Dicarboxylic Acids ◽

Lattice Energy ◽

State Density ◽

Functional Theory ◽

One Dimensional ◽

Fusion Enthalpy ◽

Pharmaceutical Salts ◽

Salt Forms

New salt forms of the antioxidant drug emoxypine (EMX, 2-ethyl-6-methylpyridin-3-ol) with pharmaceutically acceptable maleic (Mlt), malonic (Mln) and adipic (Adp) acids were obtained {emoxypinium maleate, C8H12NO+·C4H3O4 −, [EMX+Mlt], emoxypinium malonate, C8H12NO+·C3H3O4 −, [EMX+Mln], and emoxypinium adipate, C8H12NO+·C6H9O4 −, [EMX+Adp]} and their crystal structures determined. The molecular packing in the three EMX salts was studied by means of solid-state density functional theory (DFT), followed by QTAIMC (quantum theory of atoms in molecules and crystals) analysis. It was found that the major contribution to the packing energy comes from pyridine–carboxylate and hydroxy–carboxylate heterosynthons forming infinite one-dimensional ribbons, with [EMX+Adp] additionally stabilized by hydrogen-bonded C(9) chains of Adp− ions. The melting processes of the [EMX+Mlt] (1:1), [EMX+Mln] (1:1) and [EMX+Adp] (1:1) salts were studied and the fusion enthalpy was found to increase with the increase of the calculated lattice energy. The dissolution process of the EMX salts in buffer (pH 7.4) was also studied. It was found that the formation of binary crystals of EMX with dicarboxylic acids increases the EMX solubility by more than 30 times compared to its pure form.

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A novel approach for measuring room temperature enthalpy of mixing and associated solubility estimation of a drug in a polymer matrix

Polymer ◽

10.1016/j.polymer.2017.11.056 ◽

2018 ◽

Vol 135 ◽

pp. 50-60 ◽

Cited By ~ 5

Author(s):

Jonas Alin ◽

Nico Setiawan ◽

Matthew Defrese ◽

James DiNunzio ◽

Hang Lau ◽

...

Keyword(s):

Polymer Matrix ◽

Room Temperature ◽

Enthalpy Of Mixing ◽

Novel Approach ◽

Solubility Estimation

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The Role of Molecular Conformations in the Compounds Fusion Enthalpy Calculation

Zeitschrift für Physikalische Chemie ◽

10.1515/zpch-1990-01151 ◽

1990 ◽

Vol 271 (1) ◽

Author(s):

M. Yu. Gorbachov ◽

A. S. Dimoglo

Keyword(s):

Molecular Conformations ◽

Fusion Enthalpy

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Phase equilibrium for surfactant Ls-54 in liquid CO2 with water and solubility estimation using the Peng–Robinson equation of state

Fluid Phase Equilibria ◽

10.1016/j.fluid.2010.07.020 ◽

2010 ◽

Vol 298 (2) ◽

pp. 212-218 ◽

Cited By ~ 3

Author(s):

Pedro J. Tarafa ◽

Michael A. Matthews

Keyword(s):

Phase Equilibrium ◽

Equation Of State ◽

Liquid Co2 ◽

Solubility Estimation ◽

Robinson Equation

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Multi-Objective Optimization of Blending Ratio of Outlast Fiber/Cotton Blending Yarn

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.332-334.638 ◽

2011 ◽

Vol 332-334 ◽

pp. 638-642

Author(s):

Yong Fang Zhang ◽

Bu Kun Sun ◽

Yan Li Yang ◽

Chao Feng Han ◽

Wei Chen ◽

...

Keyword(s):

Objective Function ◽

Breaking Strength ◽

Fiber Content ◽

Multi Objective Optimization ◽

Test Analysis ◽

Moisture Regain ◽

Multi Objective ◽

Fusion Enthalpy ◽

Optimal Blending ◽

The Way

Trial spinning was done at 11 blending ratios (of Outlast fiber/cotton), namely 0/100, 10/90, 20/80, 30/70, 40/60, 50/50, 60/40, 70/30, 80/20, 90/10 & 100/0. By test, analysis and calculation to the targets of breaking strength, moisture regain, fusion enthalpy, crystallization enthalpy, etc. and curve simulation to them with origin7.5, an unique objective function was set in the way of objective optimization. Then lingo9.0 was applied to determine the optimal blending ratio of Outlast fiber/cotton blending yarn and it was concluded that at about 60% of Outlast fiber content, the ratio is the best, i.e. the blending yarn has the best targets in general.

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