Physico-Chemical Characteristics and Thermal Stability of Oil Based Lubricating Fluids for Glassware Production

0.5 wt.% of N-(1,3-dimethylbutyl)-N’-phenyl-p-phenylenediamine (6PPD) was introduced into polymer electrolytes based on 30% poly(methyl-methacrylate) grafted natural rubber (MG30) in order to reduce the aging factor of MG30. The polymer electrolyte without 6PPD was used as control. All samples were prepared by using solution cast techniques. The effect of 6PPD in the electrolytes was analysed by using TGA, DSC and FTIR. TGA and DSC results revealed the thermal stability of MG30 electrolytes with 6PPD have higher thermal stability but lower glass transition temperature value. FTIR studies confirmed the existence of LiTF in the sample and prove the occurrence of polymer-salt complexation. Deconvolution techniques analysis on FTIR spectra shows the electrolyte sample with 6PPD display more ion dissociation which reflects to higher ionic conductivity.

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Preparation and Characterization of Composite of Polyamide 6/Nickel Ferrite

Materials Science Forum ◽

10.4028/www.scientific.net/msf.727-728.609 ◽

2012 ◽

Vol 727-728 ◽

pp. 609-613

Author(s):

P.C.F. Menezes ◽

Taciana Regina de Gouveia Silva ◽

Ana Cristina Figueiredo de Melo Costa ◽

Edcleide Maria Araújo

Keyword(s):

Thermal Stability ◽

Nickel Ferrite ◽

Polyamide 6 ◽

Hydraulic Press ◽

Good Dispersion ◽

Distributed Load ◽

Physico Chemical ◽

The Matrix ◽

Thermal Stability Of

The research in composites attempt to predict the physico-chemical and mechanical a given mixture of materials. In this work, a composite was produced using as the polyamide 6 matrix and how the burden of nickel ferrite was incorporated as powders calcined at 1200°C and concentration of 50 wt.%. This mixture was compacted in a hydraulic press with heating and characterized by XRD, SEM and TG. XRD results showed the characteristic peaks of polyamide 6 and ferrite. SEM results showed a good dispersion of nickel ferrite loading in the matrix, the presence of larger clusters and evenly distributed load for the composite calcined at 1200 ° C. TG curves showed that the addition of loading of calcined nickel ferrite promoted an increase in thermal stability of the composite compared to pure polyamide.

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A physico-chemical assessment of the thermal stability of pneumococcal conjugate vaccine components

Human Vaccines & Immunotherapeutics ◽

10.4161/hv.29696 ◽

2014 ◽

Vol 10 (9) ◽

pp. 2744-2753 ◽

Cited By ~ 8

Author(s):

Fang Gao ◽

Kay Lockyer ◽

Karena Burkin ◽

Dennis T Crane ◽

Barbara Bolgiano

Keyword(s):

Thermal Stability ◽

Conjugate Vaccine ◽

Pneumococcal Conjugate Vaccine ◽

Physico Chemical ◽

Chemical Assessment ◽

Thermal Stability Of

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Synthesis and Physico-Chemical Properties of Polycyanurates of 2-(N,N-Diphenylhydrazino)4,6-Dichloro-s-Triazine with Various Aromatic Diols

High Performance Polymers ◽

10.1088/0954-0083/5/4/005 ◽

1993 ◽

Vol 5 (4) ◽

pp. 307-316 ◽

Cited By ~ 4

Author(s):

B S Bhonsale ◽

S N Kaula ◽

B V Patel ◽

K C Patel

Keyword(s):

Thermal Stability ◽

Chlorinated Solvents ◽

Chemical Properties ◽

Interfacial Polycondensation ◽

Bisphenol S ◽

Reaction Conditions ◽

Reduced Viscosity ◽

Physico Chemical ◽

Optimum Reaction ◽

Thermal Stability Of

Various polycynaurates were synhesised by stirred interfacial polycondensation of 2-(N.N-diphenynhydrazino)-4,6-dichloro-s-triaziae (DPHDCT) with each of the aromatic diols: bisphenol-A (BPA); bisphenol-C (BPC); bisphenol-S (BPS); phenolphthalein (Ph); catechol; resorcinol; 1,5and 2.7-dihydroxynaphthalene (DHN-1,5 and DHN-2,7) and 1,8-dihydroxyanthraquinone (DHA-1,8). Interfacial polycondensation of DPHDCT with BPA was investigated in detail in order to select optimum reaction conditions. The yield of polycyanurates varies from 6 I% to 79%. The polycyanurates are soluble in chlorinated solvents such as chloroform, dichloroethane. dichloromethane and chlorobenzene. The reduced viscosity for polycyanurates, determined with a 1 g disolution in chloroform at 25 + 3°C was found to be in the range 0.50-0.68 dl g. All the polycyanurates were characterized by IR spectra. The densities of the polycyanurates, determined using the suspension method at 25 3°C, range between 1.196 and 1.330 g cm. The overall reactivity of diols, based on reduced viscosity values, was found to decrease in the following order: PCBPA> PCPh> PCBPC> PCR>PCDHN-2,7 > PCDHN-I,5 > PCC > PCDHA-1.8 > PCBPS. The thermal stability of polycyanurates, derived from various temperature characteristics, was found to decrease in the following order: PCBPA> PCBPS> PCBPC > PCC PCR> PCDHN-2,7 PCDHN-.l 5 > PCDHA-1,8 > PCPh.

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Physico-chemical and immunological examination of the thermal stability of tetanus toxoid conjugate vaccines

Vaccine ◽

10.1016/s0264-410x(02)00342-0 ◽

2002 ◽

Vol 20 (29-30) ◽

pp. 3509-3522 ◽

Cited By ~ 25

Author(s):

Mei M Ho ◽

Fatme Mawas ◽

Barbara Bolgiano ◽

Xavier Lemercinier ◽

Dennis T Crane ◽

...

Keyword(s):

Thermal Stability ◽

Tetanus Toxoid ◽

Conjugate Vaccines ◽

Physico Chemical ◽

Immunological Examination ◽

Thermal Stability Of

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A New Marine Biomaterial: The Shell of Mangrove Horseshoe Crabs, Carcinoscorpius rotundicauda (Latreille, 1802) Emphasizing Its Physico-Chemical Characteristics

Frontiers in Marine Science ◽

10.3389/fmars.2021.612016 ◽

2021 ◽

Vol 8 ◽

Author(s):

Yusli Wardiatno ◽

Bambang Riyanto ◽

Nopa Aris Iskandar ◽

Sonja Kleinertz ◽

Peter Funch ◽

...

Keyword(s):

Thermal Stability ◽

Tensile Strength ◽

Compressive Strength ◽

Water Absorption ◽

Horseshoe Crab ◽

Chemical Characteristics ◽

Gravimetric Analysis ◽

Physico Chemical ◽

The Future ◽

Horseshoe Crabs

The paper aims to elucidate the physico-chemical characteristics of the shell of mangrove horseshoe crabs (Carcinoscorpius rotundicauda) and determine the compilation matrix for the first time. The shell composition matrix of C. rotundicauda has never been studied in detail before, especially the shape of the foam, the chemical composition, the functional groups and the mechanical-physical and thermal properties of the shell. Based on this study, the shell structure of the mangrove horseshoe crab has the potential to be used as the base structure for developing bio-foam insulator material in the future. Therefore, the shell of mangrove horseshoe crabs has a unique natural structure in the form of foam. Its robust and elastic structure has the potential for further development for new marine biomaterials. The formation and composition of horseshoe crab shells foam are also believed to be multifunctional in mobility, used for defense mechanisms and thermal stability. The horseshoe crab samples were collected from Pacitan coastal waters, East Java, Indonesia. The research was conducted using physico-chemical and mechanical-physical analysis. The scanning electron microscopy was used in order to clarify the physico-chemical characteristics. The measurements of the mechanical-physical characteristics included density, unit cell size, and water absorption. The tensile strength and compressive strength were analyzed based on the American Society for Testing Material. Thermal resistance was measured by thermal gravimetric analysis. The results showed that the horseshoe crab shells have a unique structure, where chitin, protein and some minerals are the main chemical elements. The combination and major constituents of the horseshoe crab shell material provide strong and plastic mechanical properties with a maximum tensile strength of 60.46 kPa and maximum compressive strength of 110.55 kPa, water absorption of 0.01195 ± 0.001% and a density value of 0.1545 ± 0.011 g/cm3 as well as the capability to withstand thermal loads with peak decomposition values of 267.4–823.2°C and thermal stability of 60.59%. Using natural marine biomaterials in the future will be beneficial because it leaves no harmful residues and therefore has environmental advantages and at the same time, it is also more cost-effective.

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Features of the Structure and Physical-Chemical Properties of Poly-Ortho-Toluidine Doped with Toluenesulfonic Acid

Фізика і хімія твердого тіла ◽

10.15330/pcss.20.1.82 ◽

2019 ◽

Vol 20 (1) ◽

pp. 77-82

Author(s):

A.L. Stepura ◽

O.I. Aksimentyeva ◽

P.Yu. Demchenko

Keyword(s):

Crystal Structure ◽

Thermal Stability ◽

Electrical Conductivity ◽

Specific Resistance ◽

Oxidative Polymerization ◽

Chemical Properties ◽

Conductivity Activation Energy ◽

Physical Chemical ◽

Physico Chemical ◽

Thermal Stability Of

Features of crystal structure, electrical conductivity and thermal stability of poly-ortho-toluidine (PoTi) samples, obtained with method of oxidative polymerization in the environment of sulfuric and toluenesulfonic acids (TSA), were investigated. It was discovered that PoTi-TSA samples are characterized withhigh crystallinity. According to the physico-chemical analysis, doping samples with TSA causes increase of PoTi thermal stability, electrical conductivity and sensor sensitivity on the contrary to samples doped with sulfuric acid. Based on temperature dependence of specific resistance, were calculated the values of the conductivity activation energy, which are within the limits of 0.2-0.4 eV depending on the type of dopant.

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