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Organic esters of plasticizers affecting the water absorption

  • organic esters of plasticizers affecting the water

    Organic esters of plasticizers affecting the water

    Sep 03, 2000· The effects of four organic esters used as plasticizers (triacetin, diethyl phthalate (DEP), dibutyl phthalate (DBP) and tributyl citrate (TBC)) on the water absorption behavior and adhesive property of Eudragit films and on the glass transition temperature (T g) and plasticizer permanence of Eudragit E film were investigated. The results

  • comparison of plasticizer effect on thermo-responsive

    Comparison of Plasticizer Effect on Thermo-responsive

    Jul 28, 2012· Water uptake of the polymeric films with 20% plasticizer content was investigated by soaking the films into the beakers containing phosphate buffer solution (PBS, pH 7.4) for 24 h at 27°C, 29°C, 37°C, and 42°C to determine the effect of temperature on degree of swelling. Every 30 min, the films were removed from the PBS.

  • plasticizer an overview sciencedirect topics

    Plasticizer an overview ScienceDirect Topics

    The absorption of water by nylons (polyamides) is an example. Plasticizers increase the space between the polymer chains and so they are expected to increase the permeability as well. This is shown in Fig. 1.24 which shows the effect of plasticizer level on the permeability of cellulose acetate films.

  • plasticizer wikipedia

    Plasticizer Wikipedia

    Ester plasticizers. Plasticizers used in PVC and other plastics are often based on esters of polycarboxylic acids with linear or branched aliphatic alcohols of moderate chain length. These compounds are selected on the basis of many critieria including low toxicity, compatibility with the host material, nonvolatility, and expense.

  • phthalate plasticizers welcome! sens

    PHTHALATE PLASTICIZERS Welcome! SENS

    Apr 06, 2001· Phthalate plasticizers are colorless liquids like vegetable oil with a faint odor, and they are insoluble in water. They are however, miscible in mineral oil, hexane, and most organic solvents. This makes them readily soluble in bodily fluids, such as plasma and saliva (1).

  • the effect of concentration and type of plasticizer on the

    The Effect of Concentration and Type of Plasticizer on the

    on the Mechanical Properties of Cellulose Acetate Butyrate Organic-Inorganic Hybrids 143 be used as lower cost, partial replacement for a primary plasticizer. It is possible that a plasticizer used in one formulation as a primary plasticizer could be used in a second formulation as a second one [10, 11].

  • preparation and evaluation of diltiazem hydrochloride

    Preparation and Evaluation of Diltiazem Hydrochloride

    Mar 14, 2008· S. Lin, K. Cheng, and L. Run-Chu. Organic esters of plasticizers affecting the water absorption, adhesive property, glass transition temperature and plasticizer permanence of Eudragit acrylic films. J. Control Release. 68:343–350 (2000). PubMed CrossRef Google Scholar

  • classification of plasticizers formulation

    CLASSIFICATION OF PLASTICIZERS Formulation

    Plasticizers can be divided into water-soluble and -insoluble plasticizers. Water-soluble plasticizers are dissolved, while insoluble plasticizers have to be emulsified in the aqueous phase of the polymer dispersions. The effectiveness of plasticization is resulted from the partition of plasticizer from the solvent phase into the polymer phase and subsequently diffuses throughout the polymer

  • liang run-chu's research works tatung university, taipei

    Liang Run-Chu's research works Tatung University, Taipei

    Organic esters of plasticizers affecting the water absorption, adhesive property, glass transition temperature and plasticizer permanence of Eudragit acrylic films Article Oct 2000

  • temporary restorative resins using non-phthalate ester

    Temporary restorative resins using non-phthalate ester

    Organic esters of plasticizers affecting the water absorption, adhesive property, glass transition temperature and plasticizer permanence of Eudragit acrylic films Article Oct 2000

  • esters. an introduction. people.chem.umass.edu

    Esters. An Introduction. people.chem.umass.edu

    Esters. An Introduction. Many of the compounds that contribute to the flavors and aromas in fruits and flowers are esters. Natural upper organic phase and a lower water phase (note: on a larger scale the layers separate clearly but on this small scale, because there is not much water being formed, some of the water tends to stick to the

  • organophosphate wikipedia

    Organophosphate Wikipedia

    Organophosphate pesticides degrade rapidly by hydrolysis on exposure to sunlight, air, and soil, although small amounts can be detected in food and drinking water. [citation needed] Organophosphates contaminate drinking water by moving through the soil to the ground water. When the pesticide degrades, it is broken down into several chemicals.

  • an introduction to esters chemguide.co.uk

    an introduction to esters chemguide.co.uk

    A few more esters. In each case, be sure that you can see how the names and formulae relate to each other. Notice that the acid is named by counting up the total number of carbon atoms in the chain including the one in the -COOH group.So, for example, CH 3 CH 2 COOH is propanoic acid, and CH 3 CH 2 COO is the propanoate group.

  • plasticizers: types, uses, classification, selection

    Plasticizers: Types, Uses, Classification, Selection

    The most widely used external plasticizers include esters formed from the reaction of acids or acid anhydrides with alcohols. There are two main groups of external plasticizers: A primary plasticizer enhances elongation, softness and flexibility of polymer. They are highly compatible with polymers and can be added in large quantities.

  • pharmaceutical factors affecting drug absorption blogger

    Pharmaceutical factors affecting drug absorption Blogger

    Pharmaceutical factors affecting drug absorption. Skip to main content o For example, esters can be prepared of both acids and bases to produce more stable derivatives, which hydrolyse to the active parent once absorbed. The stability and solubility of both acids and bases tend to increase when they are in the form of salts. § Miscible

  • comparison of plasticizer effect on thermo-responsive

    Comparison of Plasticizer Effect on Thermo-responsive

    Lin SY, Chen KS, Run-Chu L. Organic esters of plasticizers affecting the water absorption, adhesive property, glass transition temperature and plasticizer permanence of Eudragit acrylic films. J Contr Release. 2000;68:343–50. CrossRef Google Scholar

  • plasticizers benefits, trends, health, and environmental

    Plasticizers Benefits, Trends, Health, and Environmental

    What are plasticizers and what are their benefits? Plasticizers are colorless and odorless esters, mainly phthalates, that increase the elasticity of a material (e.g., polyvinylchloride (PVC)). Plasticizers soften the PVC to make it flexible and bendable. This opens up a

  • plasticizer molecular weight and plasticizer

    PLASTICIZER MOLECULAR WEIGHT AND PLASTICIZER

    plasticizer molecular weight and/or decreasing the degree of branching of the plasticizer can reduce volatile loss from PVC. Table 1 provides a list of commonly used plasticizers along with their molecular weight, volatility loss, and water extraction. These data show the plasticizers most resistant to volatilization have higher molecular weights.

  • isononyl isononanoate the dermatology review

    Isononyl Isononanoate The Dermatology Review

    Isononyl isononanoate is a synthetic ingredient used in cosmetics and personal care products as an emollient, texture enhancer, and plasticizer. Origin Nonanoic acid, also known as pelargonic acid, is a fatty acid composed of a nine-carbon chain terminating in a carboxylic acid. It is a clear, oily liquid that is nearly insoluble in water, but

  • plasticizer slideshare

    Plasticizer SlideShare

    Apr 09, 2016· Others- Glycerol, Propylene glycol. Organic esters Triacetin: Also known as Triethyl glycerin or glycerol triacetate. Used as both plasticizer and a solvent. This plasticizer is suitable for both aqueous and solvent based polymeric coating of tablets, granules and beads in concentration of 10-35% by weight of polymer.

  • temporary restorative resins using non-phthalate ester

    Temporary restorative resins using non-phthalate ester

    Aug 01, 2005· Read "Temporary restorative resins using non-phthalate ester plasticizers, Journal of Dentistry" on DeepDyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips.

  • the ongoing water crisis, who does it affect? ampac usa

    The Ongoing Water Crisis, Who Does It Affect? AMPAC USA

    Aug 01, 2019· As one group of emerging pollutants, the threat of organophosphate esters (flame retardants and plasticizers, OPEs) to drinking water safety is not well recognized. Now, the oral reference dose (RfD) and oral cancer slope factor (SFO) of OPEs have been updated by USPEA, therefore the threat of OPEs to drinking water safety could be assessed.

  • effects of phthalate esters on lipid metabolism in various

    Effects of phthalate esters on lipid metabolism in various

    The effect of phthalate ester plasticizers on a variety of enzyme systems was studied in rats, rabbits and pigs. The feeding of di(2-ethylhexyl) phthalate (DEHP) to animals at levels from 0.1% to 1.0% in the diet resulted in diverse biochemical effects, such as inhibition of cholesterologenesis in

  • plasticizer presentation final slideshare

    Plasticizer Presentation Final SlideShare

    Nov 21, 2009· Cont’d Water soluble plasticizers make solutions whereas the insoluble plasticizers are emulsified into dispersions. With insoluble plasticizers, their dispersion is described as a 3 phase systems containing water phase, polymer phase and plasticizer emulsified droplets. The rate and the extend of plasticizers uptake by the colloidal polymers

  • the effects of water absorption and surface springerlink

    The effects of water absorption and surface SpringerLink

    Different combinations of composites were immersed in seawater from the Persian Gulf for up to 600 h at 60 °C. Samples were tested in tension at durations up to 600 h. Absorption of seawater increased gradually with immersion time and decreased the Tg of the nanocomposites as water acts as plasticizer.

  • silanes and siliconates wacker chemie ag

    Silanes and Siliconates Wacker Chemie AG

    Silicates include all salts and esters of silicic acid. Organic silicates, such as the esters of mono and disilicic acids can only be produced synthetically. The inorganic silicates, with the exception of alkali silicates (water glass), are an important group of naturally occurring silicon

  • temporary restorative resins using non-phthalate ester

    Temporary restorative resins using non-phthalate ester

    Aug 01, 2005· Read "Temporary restorative resins using non-phthalate ester plasticizers, Journal of Dentistry" on DeepDyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips.

  • the ongoing water crisis, who does it affect? ampac usa

    The Ongoing Water Crisis, Who Does It Affect? AMPAC USA

    Aug 01, 2019· As one group of emerging pollutants, the threat of organophosphate esters (flame retardants and plasticizers, OPEs) to drinking water safety is not well recognized. Now, the oral reference dose (RfD) and oral cancer slope factor (SFO) of OPEs have been updated by USPEA, therefore the threat of OPEs to drinking water safety could be assessed.

  • effects of organic solvent exposure on humans kta

    Effects of Organic Solvent Exposure on Humans KTA

    Aug 04, 2017· Effects of Organic Solvent Exposure on Humans. esters, glycol ethers, and ketones. Organic solvents are widely employed since they dissolve, suspend or extract other materials that are not soluble in water such as resins and plastics, without chemically changing the material or the solvent.

  • plasticizers: types, uses, classification, selection

    Plasticizers: Types, Uses, Classification, Selection

    The most widely used external plasticizers include esters formed from the reaction of acids or acid anhydrides with alcohols. There are two main groups of external plasticizers: A primary plasticizer enhances elongation, softness and flexibility of polymer. They are highly compatible with polymers and can be added in large quantities.

  • what are the uses of a plasticizer in concrete? quora

    What are the uses of a plasticizer in concrete? Quora

    plasticizer which is commonly known as water reducing admixture amongst professionals is used for improving workability of concrete. The strength of concrete is a major function of water cement ratio. Higher the amount of water in fresh c...

  • effects of phthalate esters on lipid metabolism in various

    Effects of phthalate esters on lipid metabolism in various

    The effect of phthalate ester plasticizers on a variety of enzyme systems was studied in rats, rabbits and pigs. The feeding of di(2-ethylhexyl) phthalate (DEHP) to animals at levels from 0.1% to 1.0% in the diet resulted in diverse biochemical effects, such as inhibition of cholesterologenesis in

  • permeability flashcards quizlet

    Permeability Flashcards Quizlet

    Water molecule contacts surface of outer package interface and becomes sorbed into the wall Diffusion describes the general permeability of the material (interactions with molecules) Slanted represents steady state conditions at equilibrium (when water molecules have saturated interfaces and move in and out at a steady state)

  • phthalates and their alternatives: health

    Phthalates and Their Alternatives: Health

    as alternative PVC plasticizers, these substances are also being used as solvents and fixatives in cosmetic products, inks, adhesives, and other consumer products. Most of these alternative plasticizers are not well studied with regard to their potential effects on human health and the environment.

  • esters. an introduction. people.chem.umass.edu

    Esters. An Introduction. people.chem.umass.edu

    Esters. An Introduction. Many of the compounds that contribute to the flavors and aromas in fruits and flowers are esters. Natural upper organic phase and a lower water phase (note: on a larger scale the layers separate clearly but on this small scale, because there is not much water being formed, some of the water tends to stick to the

  • stability enhancement of shellac by formation of composite

    Stability enhancement of shellac by formation of composite

    May 01, 2013· Read "Stability enhancement of shellac by formation of composite film: Effect of gelatin and plasticizers, Journal of Food Engineering" on DeepDyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips.

  • a review of the factors influencing the absorption

    A Review of the Factors Influencing the Absorption

    The European Journal of Plant Science and Biotechnology ©2007 Global Science Books A Review of the Factors Influencing the Absorption and Efficacy of Lipophilic and Highly Water-Soluble Post-Emergence Herbicides Fabio Stagnari Department of Food Science, University of Teramo, Via Carlo Lerici, 1, I-64023, Teramo, Italy Correspondence: fstagnari@unite.it ABSTRACT It is well known that post

  • organophosphate ester flame retardants and plasticizers

    Organophosphate Ester Flame Retardants and Plasticizers

    The presence of organophosphate ester (OPE) flame retardants and plasticizers in surface sediment from the North Pacific to Arctic Ocean was observed for the first time during the fourth National Arctic Research Expedition of China in the summer of 2010. The samples were analyzed for three halogenated OPEs [tris(2-chloroethyl) phosphate (TCEP), tris(1-chloro-2-propyl) phosphate (TCPP), and

  • stability enhancement of shellac by formation of composite

    Stability enhancement of shellac by formation of composite

    May 01, 2013· Read "Stability enhancement of shellac by formation of composite film: Effect of gelatin and plasticizers, Journal of Food Engineering" on DeepDyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips.

  • occurrence and distribution of organophosphate esters

    Occurrence and distribution of organophosphate esters

    Occurrence and distribution of organophosphate esters flame retardants/plasticizers in the sludge from municipal wastewater treatment plants in Shanghai XU Y P, WANG Z J. Review of OPFRs in animals and humans:Absorption, bioaccumulation, metabolism, and internal exposure research[J]. distribution, and potential affecting factors of

  • ester article about ester by the free dictionary

    Ester Article about ester by The Free Dictionary

    ester, any one of a group of organic compounds with general formula RCO 2 R′ (where R and R′ are alkyl groups or aryl groups) that are formed by the reaction between an alcohol and an acid. For example, when ethanol and acetic acid react, ethyl acetate (an ester) and water

  • polymers used for fast disintegrating oral films: a review

    Polymers used for Fast Disintegrating Oral Films: A Review

    plasticizers may also affect the absorption rate of the drug. The Plasticizer employed should impart the esters of citric acid and phthalic acid. Glycerol acts as a insoluble in alcohol and other organic solvents except dimethylsulphoxide and formamide. Solubility

  • ester chemical compound britannica

    Ester chemical compound Britannica

    Ester, any of a class of organic compounds that react with water to produce alcohols and organic or inorganic acids. Esters derived from carboxylic acids are the most common. The term ester was introduced in the first half of the 19th century by German chemist Leopold Gmelin. Carboxylic acid

  • water and glycerol as plasticizers affect mechanical

    Water and Glycerol as Plasticizers Affect Mechanical

    Water and Glycerol as Plasticizers Affect Mechanical and Water Vapor Barrier Properties of an Edible Wheat Gluten Film Progress in Organic Coatings, 2018 Punnakit Nakkarat, Effect of Plasticizers on Morphology, Mechanical Properties and Water Absorption of Wheat Gluten and Epoxidized Natural Rubber Blend, Key Engineering Materials

  • what are the uses of a plasticizer in concrete? quora

    What are the uses of a plasticizer in concrete? Quora

    plasticizer which is commonly known as water reducing admixture amongst professionals is used for improving workability of concrete. The strength of concrete is a major function of water cement ratio. Higher the amount of water in fresh c...

  • wo2007056205a2 carboxyalkylcellulose esters

    WO2007056205A2 Carboxyalkylcellulose esters

    Disclosed herein are pharmaceutical compositions comprising carboxyalkylcellulose esters for delivery of pharmaceutically active substances having low solubility in a medium such as water, an acidic aqueous buffer, a neutral aqueous buffer, or a basic aqueous buffer. Also disclosed are methods for making pharmaceutical compositions and methods of administering the compositions.

  • wo2005021629a1 aromatic formals used as additives

    WO2005021629A1 Aromatic formals used as additives

    The invention relates to novel aromatic formals, thermoplastic molding compounds containing polycarbonate and at least one inventive aromatic formal as an additive to reduce water absorption, the use of such molding compounds for producing molded elements, particularly optical data carriers such as compact disks, video disks, digital versatile disks, and other optical data carriers that can be

  • bio-lubricants

    Bio-Lubricants

    resistance, low water absorption, high impact resistance, and an excellent overall balance of properties. Functional esters of EMEROX® 1144 can be used as components in urethanes and as a source of soft segments in co-polyester fibers, imparting good low temperature performance and hydrolytic resistance. Reactions of Azelaic Acid

  • isononyl isononanoate the dermatology review

    Isononyl Isononanoate The Dermatology Review

    Isononyl isononanoate is a synthetic ingredient used in cosmetics and personal care products as an emollient, texture enhancer, and plasticizer. Origin Nonanoic acid, also known as pelargonic acid, is a fatty acid composed of a nine-carbon chain terminating in a carboxylic acid. It is a clear, oily liquid that is nearly insoluble in water, but

  • influence of storage conditions and type of plasticizers

    Influence of storage conditions and type of plasticizers

    In this respect, phthalic acid esters are generally better plasticizers than citric acid and glycerol esters. Influence of storage time on properties of films. Mechanical properties of a film are critical as they affect the intended function of the film in a dosage form.

  • the ongoing water crisis, who does it affect? ampac usa

    The Ongoing Water Crisis, Who Does It Affect? AMPAC USA

    Aug 01, 2019· As one group of emerging pollutants, the threat of organophosphate esters (flame retardants and plasticizers, OPEs) to drinking water safety is not well recognized. Now, the oral reference dose (RfD) and oral cancer slope factor (SFO) of OPEs have been updated by USPEA, therefore the threat of OPEs to drinking water safety could be assessed.

  • is 9591 (1996): plasticizer esters methods of sampling

    IS 9591 (1996): Plasticizer Esters Methods of sampling

    tests for plasticizer esters which are organic esters of phthalic acid and alcohols and are liquids at ambient temperature. Reagent grade water (third revision) Determination of water by the Karl contain impurities which affect the results of analysis. 6 DETERMINATION OF