Results 251 to 260 of about 28,046 (290)
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Journal of Applied Polymer Science, 2004
AbstractWe have observed that earlier models of the reactive extrusion of ϵ‐caprolactone (CL), which do not include a consideration of mechanical degradation, significantly overpredict the molecular weights of the product. We have performed an engineering analysis of the increase in the molecular weight and the shear‐induced reduction of the molecular ...
Byong Jun Kim, James L. White
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AbstractWe have observed that earlier models of the reactive extrusion of ϵ‐caprolactone (CL), which do not include a consideration of mechanical degradation, significantly overpredict the molecular weights of the product. We have performed an engineering analysis of the increase in the molecular weight and the shear‐induced reduction of the molecular ...
Byong Jun Kim, James L. White
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Reactive Extrusion for the Production of Starch-based Biopackaging
2017Fil: Alvarez, Vera Alejandra. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones en Ciencia y Tecnología de Materiales. Universidad Nacional de Mar del Plata. Facultad de Ingeniería.
Gutiérrez Carmona, Tomy José +2 more
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A study on the reactive extrusion process of polyurethane
Polymer Engineering & Science, 1988AbstractAn engineering analysis of the reactive extrusion process of a thermoplastic polyurethane was made through numerical simulation and actual experiment. The reactants used in this system were 4,4′diphenylmethane diisocyanate, polycaprolactone diol (M.W., 824), and 1,4‐bu‐tanediol with equivalent weight ratio of 2:1:1.
Hyun, M. E., Kim, Sung Chul
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Preparation of Starch Succinates by Reactive Extrusion
Starch - Stärke, 1997AbstractThe succinylation of cornstarch by extrusion processing has been studied. Several different factors affecting the succinylation of starch were investigated including water content, succinic anhydride quantity, catalyst type and quantity, and reaction temperature.
Linfu Wang +2 more
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Reactive extrusion of polyolefin ternary blends
Journal of Applied Polymer Science, 1996Reactive extrusion of polypropylene (PP)/ethylene-propylene-diene terpolymer (EPDM)/high-density polyethylene (PE) (80/10/10 by weight) blends were carried out using a corotating twin-screw extruder. The effects of peroxide and coagent concentrations and extruder rpm were studied in terms of rheological, morphological, thermal, and mechanical ...
Byung Kyu Kim, Chi Hoon Choi
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Chemical Processes Applied To Reactive Extrusion Of Polymers
Annual Review of Materials Research, 1991Many commercial polymers such as polyamides, polyesters, and poly olefins undergo a final processing step in which polymer from a reactor tank is fed to an extruder. Molten polymer is conveyed continuously by a screw or pair of screws down the hollow barrel of the extruder to an exit die from which material is extruded into fine strands.
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Maleation of polylactide (PLA) by reactive extrusion
Journal of Applied Polymer Science, 1999Free-radical-initiated grafting of maleic anhydride (MA) onto a polylactide (PLA) backbone was performed by reactive extrusion. A concentration of 2 wt % MA in the presence of 2,5-dimethyl-2,5-di-(tert-butylperoxy)hexane (Lupersol 101) as the free- radical initiator was used for all experiments.
Denise Carlson +3 more
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