Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 68 for “"Plasticizer"”.
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Emissions of Phthalate Plasticizer from Polymeric Building Materials
… major indoor pollutants. They are mainly used as plasticizers to enhance the flexibility of polyvinylchloride (PVC) products, as well as in humectants, emollients, and antifoaming agents. Phthalates are found in a wide range of consumer products including floor and wall coverings, car interior …
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Effect of structure and plasticizer on the glass transition of adsorbed polymer
… <p>The dynamics of the phenyl-deuterated plasticizer di(propylene glycol) dibenzoate in bulk and adsorbed PVAc on silica were probed using solid-state ²H NMR. The dynamics of this plasticizer in the plasticized-bulk polymer system were found to be heterogeneous. For adsorbed PVAc on …
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Effect of photoageing and plasticizer content on the mechanical and adhesive properties of polyvinylbutyral
… of polyvinylbutyral and determine the effect of plasticizer content and photoageing on these properties. This data would be used to understand how the performance of laminated safety glass is related to the choice of adhesive interlayer. Samples of PVB plasticized with 0 to 40% butyl benzyl …
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Preparation and Properties of Flexible Resin Sheets From Zein
… flexible packaging materials. Methods of plasticizer incorporation influenced effectiveness of plasticization. Stabilizing and enhancing of plasticizer-zein complexes are crucial to accomplish plasticization.
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Co-Extrusion of Cement -Based Materials to Achieve Functionally Graded Microstructure
… was explored to replace commonly used cellulose plasticizer in order to solve the problem of air voids associated with cellulose. The effect of clays on plasticizing cementitious pastes was evaluated by rheological and zeta potential measurements. Only zeta potential was found to be valuable to …
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Structural relaxation of binary food systems
… food systems. It studied the effect of anti-plasticizer addition (i.e. addition of glucose syrup solid and addition of starch) on structural relaxation of sucrose based amorphous mixtures. It also studied the effect of plasticizer addition (i.e. addition of water) on these two binary systems …
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Establishing the Conditions for Stable Extrusion of Melt Spun Polyacrylonitrile with Water Based Plasticizers
… of establishment of conditions (temperature, plasticizer type, and plasticizer composition) that a PAN copolymer is able to be stable melt spun with water based plasticizers. More specifically, PAN/water/acetonitrile (70/15/15) mixture is considered as reference sample in this study because it …
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Study of polymeric film bonding for pharmaceutical applications
… with varying amounts of a popularly used plasticizer PEG (polyethylene glycol) in order to achieve adequate bonding for thin-films. The effects of plasticizer in aiding polymer adhesion through interdiffusion are investigated by evaluating the glass transition temperatures and …
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Development of Co-processed Plasticized Cellulose Acetate for Sustained Release Matrix Tablets
… to prepare the co-processed excipients with CA, plasticizer and inert excipient. The physical, flow and compaction properties of the co-processed excipients were evaluated. All the co-processed excipients prepared in this study all showed good flow characteristic. The spray dried process produced …
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A Novel Shear Thinning and Thixotropic Plga Micro Particulate Suspension System for Controlled Drug Delivery
… phase and a final burst release phase.</p> <p> Plasticizer molecules are well known for their ability to create a flexible polymer matrix thereby allowing a continuous drug release. Polymer solutions made with certain highly hydrophilic plasticizers however, are not completely devoid of the …
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PVDF-graphene conductive composite membrane and PVA-graphene conductive composite membrane preparation and application
… to investigate the best ratio of PVDF, plasticizer, and solvent. Results showed that PVDF amount should not be higher than 15% by weight. In addition, the breaking stain and the contact angle increased with increasing plasticizer concentration; whereas the ultimate force decreased. The …
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Effects of plasticizers on extrusion of PVC: an experimental & numerical study
Plasticizers are often interchanged with the idea that they will not affect the processing behavior of Polyvinyl Chloride (PVC). However, when the plasticizer type is changed, various complaints are made by the processors that the material no longer processes the same. This research was concerned …
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The attempted plasticization of cellulose from cellulose xanthate
… amounts of water which also seemed to remove the plasticizer. Some of the plasticizers were soluble in alkaline solutions and in the dissolving out of the salts, the dissolved salts caused high causticity, thus removing the plasticizer also. The acid-treated samples (A) and (C) required from three …
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Controlled Release of Insulin and Modified Insulin from a Novel Injectable Biodegradable Gel
… acid (PLGA), in biocompatible <br />plasticizer(s), triethyl citrate (TEC) and/or acetyl triethyl citrate (ATEC). Insulin was <br />then loaded into the blank gel to form an insulin suspension in the polymer solution. <br />After the insulin-loaded gel was injected subcutaneously, the …
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Formulation and dissolution of polymer strip films for the delivery of poorly water-soluble drug nanoparticles
… quality and performance. In one study, three plasticizers at three different concentrations are incorporated into drug nanoparticle-loaded polymer films. A depression in glass transition temperature is observed with increasing plasticizer concentration, along with a corresponding decrease in …
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The bonding of plasticized polyvinyl chloride sheet to metal
… metals, of types of adhesives, and of amount of plasticizer in the adhesive upon the bond strength between polyvinyl chloride sheet and metal was determined and the following conclusions were reached: 1. The bond strength was affected by surface conditions. Etched specimens had higher bond …
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Immediate release ginseng chewable tablets and sustained release amino acid pellets based on dry powder coating technology platform
… sustained release amino acid pellets using the plasticizer powder coating technique. For the immediate release ginseng chewable tablets, the content and types of tableting materials, as well as coating materials, coating temperature, curing time and coating level, were optimized. For the …
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The modification of polymeric materials with plasticizers or elastomers
The modification of polymeric materials using plasticizers or elastomers has been investigated in three research programs. The first describes epoxy resins modified with dimethylsiloxane, dimethyl-co-methyltrifluoropropyl siloxane, and dimethyl-co-diphenyl siloxane. The apparent compatibility …
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Understanding How Tape Casting Titanium Diboride Shifts its Processing-Microstructure-Properties Paradigm Toward New Applications
… to understand the role of dispersant, binder and plasticizer in the suspension and their interaction with the surface chemistry of the TiB2 particles to develop a stable, homogenous suspension, with minimum additive amounts (0-2 wt%). Homogeneous, flexible and strong TiB2 tapes were prepared using …
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A thermal/thermo-mechanical and imaging study of component distribution and interaction in pharmaceutical film coats
… properties of EC films incorporated with various plasticizers and pore forming agents, hence to understand the drug release mechanisms in relation to the physical characteristics of EC films. The thermal properties of EC powder and EC films were initially characterized by means of …
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