DSC Analysis of Vegetable Oils: Relationship between Thermal Profiles and Chemical Composition

2014 ◽  
pp. 3-26
Author(s):  
Chin Tan ◽  
Imededdine Nehdi
Keyword(s):  
Chemical Composition ◽  
Vegetable Oils ◽  
Dsc Analysis

A review of chemical composition and nutritional properties of minor vegetable oils in China

2018 ◽  
Vol 74 ◽  
pp. 26-32 ◽  
Author(s):  
Ruinan Yang ◽  
Liangxiao Zhang ◽  
Peiwu Li ◽  
Li Yu ◽  
Jin Mao ◽  
...  
Keyword(s):  
Chemical Composition ◽  
Vegetable Oils ◽  
Nutritional Properties

scholarly journals Synthesis of Poly(styrene-acrylates-acrylic acid) Microspheres and Their Chemical Composition towards Colloidal Crystal Films

2016 ◽  
Vol 2016 ◽  
pp. 1-10 ◽  
Author(s):  
Luis A. Ríos-Osuna ◽  
Angel Licea-Claverie ◽  
F. Paraguay-Delgado ◽  
Norma A. Cortez-Lemus
Keyword(s):  
Chemical Composition ◽  
Colloidal Crystal ◽  
Core Shell ◽  
Large Decrease ◽  
Dsc Analysis ◽  
Adhesive Properties ◽  
Sensing Applications ◽  
Crystal Films ◽  
Core Shell Structure ◽  
Comonomer Content

In this paper, polystyrene colloidal microspheres have been prepared using hexyl acrylate (HA), ethylhexyl acrylate (EHA), isooctyl acrylate (IOA), butyl acrylate (BA), or isobutyl acrylate (IBA) as comonomers. Microspheres with diameters from 212 to 332 nm and with a polystyrene content of 65–78% were prepared. The particles prepared in this work do not present the typical core-shell structure; as a consequence, DSC analysis showed that the microspheres exhibited only one Tg. TEM images show that the particles with comonomer content below ~30% were spherical and regular. Microspheres containing comonomer between 21 to 25% produced the less brittle films showing very iridescent colors. The films prepared from microspheres containing hexyl, ethylhexyl, and isooctyl acrylate as comonomers are firmly attached to the substrate due to their adhesive properties. The large decrease of the fragility observed in these films makes them much more attractive materials in sensing applications.

scholarly journals Cyclic Carbonates Based on Vegetable Oils

2014 ◽  
Vol 27 ◽  
pp. 20-29 ◽  
Author(s):  
D. Miloslavskiy ◽  
E. Gotlib ◽  
O. Figovsky ◽  
D. Pashin
Keyword(s):  
Carbon Dioxide ◽  
Chemical Composition ◽  
Vegetable Oils ◽  
Catalyst Concentration ◽  
Raw Materials ◽  
Cyclic Carbonates ◽  
Carbonation Reaction ◽  
Carbonation Process ◽  
Carbon Dioxide Pressure ◽  
Vegetable Raw Materials

The analysis of literary data on the obtaining of cyclic carbonates based on the vegetable oils has been carried out. The influence on carbonation reaction the type of vegetable oil, the chemical composition and catalyst concentration, state of carbon dioxide, pressure and temperature have thus been considered. The carbonation process of epoxidized oils that are valuable renewable vegetable raw materials is studied insufficiently.

scholarly journals An Overview of the Biolubricant Production Process: Challenges and Future Perspectives

Processes ◽  
2020 ◽  
Vol 8 (3) ◽  
pp. 257 ◽  
Author(s):  
Juan Antonio Cecilia ◽  
Daniel Ballesteros Plata ◽  
Rosana Maria Alves Saboya ◽  
Francisco Murilo Tavares de Luna ◽  
Celio L. Cavalcante ◽  
...  
Keyword(s):  
Chemical Composition ◽  
Environmental Impact ◽  
Research And Development ◽  
Chemical Reactions ◽  
Vegetable Oils ◽  
Future Perspectives ◽  
Mineral Oils ◽  
Natural Oils ◽  
Polyol Esters ◽  
Branched Chain

The term biolubricant applies to all lubricants that are easily biodegradable and non-toxic to humans and the environment. The uses of biolubricant are still very limited when compared to those of mineral oils, although this trend is increasing and depends on investment in research and development (R&D). The increase in demand for biodegradable lubricants is related to the evolution of environmental regulations, with more restrictive rules being implemented to minimize environmental impact caused by inappropriate disposal. This study provides an overview of the types, production routes, properties, and applications of biolubricants. Biolubricants are classified as either natural or synthetic oils according to chemical composition. Natural oils are of animal or vegetable origin and are rarely used because they are unstable at high temperatures and form compounds that are harmful to equipment and machines. Synthetic oils are obtained from chemical reactions and are the best lubricants for demanding applications. They are obtained by various routes, mainly by obtaining straight or branched-chain monoesters, diesters, triesters, and polyol esters from vegetable oils. The conversion of triglyceride to esters can be followed or preceded by one or more reactions to improve reactions such as epoxidation and hydrogenation.

scholarly journals DSC Analysis Of Order–Disorder Transition In Ni3Al Based Alloys From Ni-Al-Cr System

2015 ◽  
Vol 60 (3) ◽  
pp. 1871-1876 ◽  
Author(s):  
T. Maciąg ◽  
K. Rzyman ◽  
R. Przeliorz
Keyword(s):  
Thermal Analysis ◽  
Chemical Composition ◽  
Crystal Lattice ◽  
Phase Boundary ◽  
Characteristic Temperature ◽  
Intermetallic Phase ◽  
Dsc Analysis ◽  
Heating And Cooling ◽  
Disordered Phase ◽  
Cr System

AbstractNi-Al-Cr system is significant for industrial alloys based on intermetallic phase Ni3Al, that crystallizes in crystal lattice L12. It is indicated as γ′, contrary to disordered phase γ which occurs with addition of chromium. DSC analysis was performed on alloys of chemical composition from Ni75Al25÷Ni75Cr25 range of Ni-rich part of Ni-Al-Cr system. In addition, few measurements were conducted using DTA method. Based on curves registered, it was possible to identify characteristic temperature during heating and cooling of the sample. It corresponds to existence of phase boundary γ′+γ / γ in examined alloys. Results of thermal analysis were compared with results obtained with other method performed by authors which is solution calorimetric method.

scholarly journals Research of Ecological Safety and Chemical Compositions of Phospholipids Obtained from Local Vegetable Oils and Their Miscelles

2021 ◽  
Vol 288 ◽  
pp. 01084
Author(s):  
Dilafruz Sagdullaeva ◽  
A.S. Turaev ◽  
Dilnoza Salikhanova ◽  
Saidakbar Abdurakhimov ◽  
Dilnoza Jumaeva ◽  
...  
Keyword(s):  
Chemical Composition ◽  
Mass Spectroscopy ◽  
Vegetable Oils ◽  
Complex Analysis ◽  
Cottonseed Oil ◽  
Environmental Safety ◽  
Extraction Methods ◽  
Chemical Compositions ◽  
Ecological Safety ◽  
Modern Methods

There is considered the environmental safety and chemical composition of phospholipids obtained from local vegetable oils and miscella. It was established that the complex analysis of phospholipids using modern methods of IR, NMR, and mass spectroscopy made it possible to identify the main types of phospholipids used in cotton oils obtained by pressing and extraction methods. It is displayed that cottonseed oil, regardless of the method of its production, contains a certain amount of gossypol and its derivatives, since it is environmentally unsafe and these surfactants should not be used for food purposes, which gives reason to recommend the isolated phospholipids for use in technical purposes.

Vaporization and Carbonization Tendency of Vegetable Oils as a Function of Chemical Composition

2011 ◽  
pp. 409-433 ◽  
Author(s):  
Leslie Rudnick ◽  
Mohamed Abdellatif ◽  
Ömer Gül ◽  
Girma Biresaw
Keyword(s):  
Chemical Composition ◽  
Vegetable Oils

scholarly journals CHEMICAL COMPOSITION AND CRYSTALLIZATION TEMPERATURES OF ESTERS OBTAINED FROM FOUR VEGETABLE OILS EXTRACTED FROMSEEDS OF BRAZILIAN CERRADO PLANTS

Química Nova ◽  
2015 ◽  
Author(s):  
Luciane Pierezan ◽  
Márcia Regina Pereira Cabral ◽  
Deluana Martins Neto ◽  
Jusinei Meireles Stropa ◽  
Lincoln Carlos Silva de Oliveira ◽  
...  
Keyword(s):  
Chemical Composition ◽  
Vegetable Oils ◽  
Brazilian Cerrado
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