1 edition of Lactic acid derivatives as plasticizers esters of polymeric lactic acid found in the catalog.
Lactic acid derivatives as plasticizers esters of polymeric lactic acid
E. M Filachione
by U.S. Dept. of Agriculture, Bureau of Agricultural and Industrial Chemistry in Philadelphia, Pa
|Statement||E.M. Filachione ... [et al.]|
|Series||AIC -- 295, AIC -- 295.|
|Contributions||United States. Bureau of Agricultural and Industrial Chemistry|
|The Physical Object|
|Pagination||11 p. :|
|Number of Pages||11|
Under gamma irradiation poly(l-lactic acid), the random scission of molecular chains takes place, which results in the sharp decrease in the numerical average molecular weight. Moreover, due to the exposure to gamma radiation, several free radicals centered on carbon atoms are formed which release volatile products or restore polymeric Cited by: 2. processes from renewable resources. Although many sources of biomass can be used, corn has the advantage of providing the required high-purity lactic acid. PLA can be synthesized from lactic acid in two ways: a direct polycondensation reaction or ring-opening polymerization of a lactide monomer.
The IHS Process Economics Program Chemical PEP Report emphasizes developments that have potential implications for the chemical and energy industries. Customer Logins Obtain the data you need to make the most informed decisions by accessing our . Section VII - Chapter Plastics and Articles Thereof: Notes: 1. Throughout the export schedule the expression "plastics" means those materials of headings to which are or have been capable, either at the moment of polymerization or at some subsequent stage, of being formed under external influence (usually heat and pressure, if necessary with a solvent or plasticizers) by.
Lactide itself can be made through lactic acid fermentation from renewable resources such as starch by means of various bacteria. PLA can also be produced directly from lactic acid by polycondensation. However, this process yields low molecular weight polymers, and the disposal of the solvent is a problem in the industrial justeetredehors.com by: 3. Dec 17, · Oligomeric and polymeric plasticizers. The common way to reduce plasticizers' migration and evaporation is to increase their molecular weight in such a way to retain their miscibility with the polymer matrix at the same time. In this respect, many researchers have investigated the effect of some oligomeric and polymeric molecules as Cited by:
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Lactic acid-based polymers have attracted much attention as biomaterials and packaging materials during last few decades.
Lactic acid polymers are biodegradable, low toxic, and bioresorbable in. Polylactic acid or polylactide (PLA) is a thermoplastic aliphatic polyester derived from renewable justeetredehors.comPLA had the second highest consumption volume of any bioplastic of the world, although it is still not a commodity justeetredehors.com widespread application has been hindered by numerous physical and processing justeetredehors.comider: None.
Poly(lactic acid), PLA, was blended with monomeric and oligomeric plasticizers in order to enhance its flexibility and thereby overcome its inherent problem of brittleness. Differential scanning calorimetry, dynamic mechanical analysis, transmission electron microscopy, and tensile testing were used to investigate the properties of the blends.
Full text of "Properties and reactions of lactic acid: Tol uenesul fonates as Intermediates in the Preparation of Lactic Acid Derivatives The toluenesulf onat e of lactic acid and alkyl justeetredehors.com is of considerable interest because (a) it can be used conveniently to prepare many lactic acid derivatives, and (b) the transformation of the.
A 'read' is counted each time someone views a publication summary (such as the title, abstract, and list of authors), clicks on a figure, or views or downloads the full-text. e.g. flax, hemp, ramie, etc. into a biopolymeric matrix made of derivatives from cellulose, starch, lactic acid, etc., new fibre reinforced materials were developed .
Huda et. eval‐ uated the use of recycled cellulose in the development of “green” composites using. Hydrophobic plasticizer protects polylactide (PLA) against hydrolytic degradation but still migrates to aging medium and there undergoes further hydrolysis contributing to the spectrum of degradation products.
PLA plasticized with hydrophobic acetyl tributyl citrate (ATC) plasticizer showed a slower degradation rate compared with pure PLA because of the increased hydrophobicity of the material.
Esters of maleic acid have very good plasticizing properties but, similar to DOP have strong resistance to biodegradation. 39 Succinic esters of straight chain alcohols are excellent green plasticizers.
39 They have good plasticizing properties and they are quickly degraded because of favorable orientation of molecular structure (both maleic and phthalic acids have cis orientation). Levulinic acid (LA) or 4-oxopentanoic acid is a promising “platform chemical” that can be obtained from renewable biofeedstocks in a cost-effective way via catalytic processes.
The presence of both carboxylic acid and keto functional groups makes LA a potential starting material to synthesize useful chemicals.
Poly(lactic acid) (PLA), a biodegradable polymer has been proposed as a solution to the waste problems related to non-biodegradable polymers. PLA-based materials have many advantages over their non-biodegradable competitors, such as stiffness, transparency, and justeetredehors.com by: Full text of "Bibliography on lactic acid and derivatives" See other formats.
“What Do You Have in the ‘Bio’ Range?” the percentage of plasticizers and other additives is significant, so replacing non-renewably sourced materials with bio-based ones makes a difference in a product’s carbon footprint. Corbion sees interest in using its lactates and lactylates (lactic acid derivatives) as catalyst.
The so-called biocomposites produced by embedding natural fibres, e.g. flax, hemp, ramie, etc. into a biopolymeric matrix made of derivatives from cellulose, starch, lactic acid, etc., new fibre reinforced materials were developed.
Huda et. evaluated the use of recycled cellulose in the development of “green” composites using PLA as Cited by: 9. Introduction. Over the past decade, there has been a significant research interest on compostable and/or biodegradable polymers in order to alleviate solid waste disposal problems related with petro-based plastics (Lim et al., ).These biodegradable polymeric materials are increasingly used today in packaging, agricultural, medical, pharmaceutical, and other areas (Rabetafika et al., Cited by: POLYMERIC MATERIALS: COMPONENTS, ADDITIVES, EXTRACTABLES, AND (lactic-co-glycolic) acid PLGA O H x y O O O HO Drug encapsulation Polylactic acid PLA O CH 3 n 3CH 3 O O O OH HO Drug Lead soap Organo tin compounds Ca-Zn soaps Thiourea derivatives Indol derivatives Diketones Epoxy esters Oxalanilide.
Bioplastics are usually derived from sugar derivatives, including starch, cellulose, and lactic acid. As ofbioplastics represented approximately % of the global polymer market ( million tons).
justeetredehors.com Page Wednesday, October 6, AM In biological systems, polysaccharides and their derivatives are found as energy reservoirs, as components of the cell wall of plants, in bacteria, and in the (lactic acid)-based polymeric systems, and a vast literature (research articles 8–15 and reviews 6, In this work, biodegradable films based on poly (lactic acid) (PLA) and corn thermoplastic starch (TPS), additivated with epoxidized cardoon oil plasticizer (ECO) at 3% by weight with respect to PLA mass fraction, were prepared by melt extrusion process and compression molding.
The effect of ECO on structural, thermal, mechanical, barrier, and spectral optical properties of the films was Author: Rosa Turco, Rodrigo Ortega-Toro, Riccardo Tesser, Salvatore Mallardo, Sofia Collazo-Bigliardi, Ampar. Poly(lactic acid) (PLA), an aliphatic polyester, has outstanding advantages over other polymers, and may thus be part of the solution.
As early as the ’s, PLA products have been approved by the US Food and Drug Administration (FDA) for direct contact with biological fluids.
poly-lactic acid PLA from maize/corn, poly-hydroxy buterate poly-capro lactone and so on. spreads, margarine, and mayonnaise-food applications such as inks, plasticizers, crayons, —and also in non paints, and soy candles .
Soybean oil (SBO) is the most. Aug 13, · Abstract. Poly(lactic acid) (PLA) is currently the most used biopolymer in several food packaging applications at industrial level, due to its many advantages such as high transparency, availability in the market, and ease of justeetredehors.com by: 3.The use of β-CDs as nucleating agents for PLA to provide an increase in polymer crystallinity is described.
The improvement in increased crystallinity is related to the percentage of β-CDs used. For the analyzed films, crystallinity was approximately % in the absence of a nucleating agent, and approximately % in the presence of the maximum amount of nucleating agent tested (e.g., 30%).Cited by: The DE 40 03 A1 describes sulfated hydroxycarboxylic acid esters and their use as surfactants.
The example A for the preparation of lactic acid lauryl ester described on page 4 of this document is not executable Technical teaching for the preparation of lauryl esters of lactic acid justeetredehors.com by: 2.