Compounding Polymer Blends

Utracki, L. A.; Shi, Guoqin

doi:10.1007/0-306-48244-4_9

Cited by 10 publications

(7 citation statements)

References 179 publications

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“…Stationary and continuous solvent casting process is shown in Figure 2-1. Solvent casting may affect the physical and mechanical properties of the polymer [11]. The casting process also may affect the orientation of the polymeric chains.…”

Section: Solvent Castingmentioning

confidence: 99%

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Development of Novel Method for Rapid Extract of Radionuclides from Solution using Polymer Ligand Film

Rim¹

2013

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Accurate and fast determination of the activity of radionuclides in a sample is critical for nuclear forensics and emergency response. Radioanalytical techniques are well established for radionuclides measurement, however, they are slow and labor intensive, requiring extensive radiochemical separations and purification prior to analysis. With these limitations of current methods, there is great interest for a new technique to rapidly process samples. This dissertation describes a new analyte extraction medium called Polymer Ligand Film (PLF) developed to rapidly extract radionuclides. Polymer Ligand Film is a polymer medium with ligands incorporated in its matrix that selectively and rapidly extract analytes from a solution. The main focus of the new technique is to shorten and simplify the procedure necessary to chemically isolate radionuclides for determination by alpha spectrometry or beta counting. Five different ligands were tested for plutonium extraction: bis(2-ethylhexyl) methanediphosphonic acid (H 2 DEH[MDP]), di(2-ethyl hexyl) phosphoric acid (HDEHP), trialkyl methylammonium chloride (Aliquat-336), 4,4'(5')-di-t-butylcyclohexano 18crown-6 (DtBuCH18C6), and 2-ethylhexyl 2-ethylhexylphosphonic acid (HEH[EHP]). The ligands that were effective for plutonium extraction further studied for uranium extraction. The two ligands, H 2 DEH[MDP] and HDEHP, which showed effectiveness in plutonium extraction were extensively studied. The extraction of strontium was exclusively studied with DtBuCH18C6. This particular ligand was effective for strontium separation in resin bead form. However, in PLF form, the ligand became completely ineffective for strontium extraction. vii

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Section: Solvent Castingmentioning

confidence: 99%

“…Solvent evaporation from a polymer film results in one-dimensional thickness reduction. The orientation of the polymeric chains is determined by stretching the polymer in the planar directions during the solvent evaporation process [11].…”

Section: Solvent Castingmentioning

confidence: 99%

Development of Novel Method for Rapid Extract of Radionuclides from Solution using Polymer Ligand Film

Rim¹

2013

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“…Cole-Cole plot is a well-known curve for investigation of rheology of two-phase systems like polymer blends and filled polymer which forms by a plot of imaginary viscosity (η″) versus real viscosity (η′). This plot is often used to analyze miscibility of polymer blends: thus a smooth, semi-circular shape suggests a better compatibility [1]. As shown in Fig.…”

Section: Melt Dynamic Rheologymentioning

confidence: 99%

“…Blends offer new technological and economical benefits: Providing materials with full set of desired properties at the lowest price, extending the engineering resins' performance, improving specific properties such as impact strength or solvent resistance, improving processability and product uniformity, reduction of the number of grades that need to be manufactured, inherent recyclability and etc [1]. From an application point of view, melt rheological properties are vitally important for processing of polymer-based nanocomposites.…”

Section: Introductionmentioning

confidence: 99%

An Investigation on Polypropylene/Nylon 66/TiO<sub>2</sub> Blend Nanocomposites: Rheological Models

Asgari

Ebadi‐Dehaghani

Ashouri

et al. 2013

AMR

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Nanocomposites based on polypropylene (PP), polyamide 66 (nylon 66) and PP/nylon 66 immiscible blends containing 5wt% TiO2nanoparticles were prepared via melt compounding. The influences of TiO2on the rheology of nanocomposites and blend nanocomposites were investigated. Scanning electron microscopy results revealed the size of inclusion phase was smaller in PP/PA 66/TiO275/25/5 comparing to the PP/PA 66/TiO225/75/5. A co-continuos phase was observed at 50/50 composition. Melt dynamic rheology showed that the moduli of the PP increased with incorporation of TiO2nanoparticles at the moderate frequencies, while this effect was reverse in PA 66 nanocomposite. Several rheological and rheo-morphological models were used for prediction of rheological parameters. The well-known models for rheology of suspensions proposed by Einstein, Roscope and Eilers-van Dijck were successful for prediction of viscosity of PA nanocomposite. Palierne model was fitted to the experimental values especially for the: PP/PA 66/ TiO225/75/5 blend nanocomposite.

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“…[5][6][7][8][9][10][11][12][13][14][15][16][17][18][19] Blending is commonly used to obtain enhanced certain properties of the polymers. 20 In this regard, blending low density polyethylene (LDPE) with ethylene vinyl acetate (EVA) copolymer has been reported to impart improved properties such as flexibility, toughness, higher shrinkage at low temperature and a lower thermal conductivity when compared to neat LDPE. A number of inherent features of EVA such as structural similarity with LDPE, high polarity (due to polar nature of the acetoxy side group), low temperature flexibility and good impact strength (toughness) have turned EVA to a candidate of choice for blending with LDPE.…”

Section: Introductionmentioning

confidence: 99%

Preparation and characterisation of UV irradiation cross-linked LDPE/EVA blends

Shamekhi

Jafari

Khonakdar

et al. 2010

Plastics, Rubber and Composites

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Ultraviolet induced cross-linking of low density polyethylene/ethylene vinyl acetate melt mixed blends were explored in presence of trimethylolpropane trimethacrylate (TMPTMA) and benzophenone (BP) as cross-linking agent and photoinitiator respectively. On the basis of gel content, it was found that 1 wt-%TMPTMA, 1 wt-%BP and irradiation time of 100 s represent the optimum parameters for photocross-linking of this system. Infrared spectroscopy was also used to follow the cross-linking reactions. Differential scanning calorimetry analysis showed that the heat of fusion reduces upon cross-linking development in the system, implying that crystallisability of the samples is suppressed with increasing cross-link bonds. Thermal stability of samples as a function of irradiation time goes through a maximum and then diminishes. Mechanical examinations in tensile mode proved that elongation at break of neat and blended specimens drops significantly with increasing degree of cross-linking, while variations of Young's modulus of the blends show a composition dependent behaviour in which crystallisability of the samples is a major determinant.

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Compounding Polymer Blends

Cited by 10 publications

References 179 publications

Development of Novel Method for Rapid Extract of Radionuclides from Solution using Polymer Ligand Film

Development of Novel Method for Rapid Extract of Radionuclides from Solution using Polymer Ligand Film

An Investigation on Polypropylene/Nylon 66/TiO<sub>2</sub> Blend Nanocomposites: Rheological Models

Preparation and characterisation of UV irradiation cross-linked LDPE/EVA blends

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