Results 301 to 310 of about 57,907 (324)
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Cyclische monomere und oligomere in polyamid‐11 und polyamid‐12
Die Angewandte Makromolekulare Chemie, 1973AbstractDer Gleichgewichtsgehalt an cyclischen Monomeren in hydrolytisch Polymerisiertem Polyamid‐11 und Polyamid‐12 bei 280°C wurde aus den Cyclisierungs‐konstanten nach STOLL und ROUVé sowie nach MORAWETZ und GOODMAN, der Gehalt an cyclischen Dimeren und Trimeren nach den statistisch abgeleiteten Beziehungen von JACOBSON und STOCKMAYER berechnet.Die ...
R. Feinauer, Von R. Feldmann
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Generalization of the static mechanical properties of plasticized polyamide-12 and polyamide-6
Polymer Science U.S.S.R., 1989Abstract Generalization of the static mechanical properties of plasticized PA-12 andthe method of reduced variables over a wide temperature range has yielded a discrete series of values of the effective activation energy corresponding to the main relaxation processes. The character of change in effective activation energy with strain is regarded as a
J.V. Ivankina +2 more
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New solvent for polyamides and its application to the electrospinning of polyamides 11 and 12
Polymer, 2007Polyamides with long hydrocarbon chains, e.g. PA11 and PA12, are generally dissolved in phenolic or fluoric solvents that prevent these polymers from being electrospun and used in many applications because of their high boiling point and/or prohibitive cost. We demonstrate that a mixture of formic acid and dichloromethane can lead to the dissolution of
Kris Behler, Yury Gogotsi, Mickael Havel
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Crystalline organization and toughening: example of polyamide-12
Polymer, 2005Improving the impact resistance of plastics is a key to many applications. Today, dispersing rubber and inorganic particles into semicrystalline polymers is widely used to increase their impact strength without greatly altering other interesting properties such as elastic modulus or chemical resistance.
Corté, Laurent +2 more
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Engineering Fracture Mechanics, 2018
Abstract The influence of the orientation and of the temperature on the mechanical properties of the polyamide 12 (PA12) and the polyamide 12 reinforced with glass beads processed via Selective Laser Sintering was analyzed. Tensile and fracture tests were performed at −50 °C, 23 °C and 50 °C with applied load perpendicular and parallel to the layered
Alicia Salazar +2 more
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Abstract The influence of the orientation and of the temperature on the mechanical properties of the polyamide 12 (PA12) and the polyamide 12 reinforced with glass beads processed via Selective Laser Sintering was analyzed. Tensile and fracture tests were performed at −50 °C, 23 °C and 50 °C with applied load perpendicular and parallel to the layered
Alicia Salazar +2 more
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1998
This chapter illustrates some examples of the structural and dynamic analyses performed for polyamides such as nylon 4, 6, 7, 11, and 66, including the oriented fibers of aromatic polyamides, poly( m- phenylene isophthalamide) (PMIA) and poly(4-methyl- m -phenylene terephthalamide) (P4-MPTA).
Tetsuo Asakura, Isao Ando
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This chapter illustrates some examples of the structural and dynamic analyses performed for polyamides such as nylon 4, 6, 7, 11, and 66, including the oriented fibers of aromatic polyamides, poly( m- phenylene isophthalamide) (PMIA) and poly(4-methyl- m -phenylene terephthalamide) (P4-MPTA).
Tetsuo Asakura, Isao Ando
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Investigation of structure development in polyamide 11 and polyamide 12 tubular film extrusion
Polymer Engineering & Science, 2002AbstractThe processability of single bubble polyamide 11 and polyamide 12 films was investigated. The development of crystalline structure and chain orientation of polyamide 11 and polyamide 12 films in single bubble film blowing was studied by differential scanning calorimetry (DSC), wide angle X‐ray diffraction (WAXS), infrared (IR) spectroscopy, and
Sangkeun Rhee, James L. White
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Journal of Applied Polymer Science, 2006
AbstractBoth polyamide 12 (PA 12)/clay and polyamide 6–polyamide 66 copolymer (PA 6/6,6)/clay nanocomposites were prepared by melt intercalation. The incorporation of 4–5 wt % modified clay largely increased the strength, modulus, heat distortion temperature (HDT), and permeation resistance to methanol of the polyamides but decreased the notched impact
Ji-Cheng Yang +3 more
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AbstractBoth polyamide 12 (PA 12)/clay and polyamide 6–polyamide 66 copolymer (PA 6/6,6)/clay nanocomposites were prepared by melt intercalation. The incorporation of 4–5 wt % modified clay largely increased the strength, modulus, heat distortion temperature (HDT), and permeation resistance to methanol of the polyamides but decreased the notched impact
Ji-Cheng Yang +3 more
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Fabrication of new antifungal polyamide-12 material
Polymer International, 2012Water-resistant polymeric biocide poly(hexamethylene guanidine) dodecylbenzenesulfonate (PHMG-DBS) was synthesized by anion metathesis between poly(hexamethylene guanidine) hydrochloride and sodium dodecylbenzenesulfonate and subsequently characterized using elemental analysis, Raman spectroscopy and thermogravimetric analysis.
Jean-François Bardeau +3 more
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Structure and properties of polyamide 12 alloys
2007Polymer alloys composed polylaurolactam (polyamide 12) and segmented polyalurolactam with different content of soft segments are interesting engineering thermoplastic materials having a broad spectrum of properties. The reason for this broad spectrum are the phase structure and the special interactions between the components at the phase boundaries ...
M. Kita +3 more
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