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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, Mickael Havel, Yury Gogotsi
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Relaxational properties of plasticized polyamide-12
Polymer Science U.S.S.R., 1979The dielectric relaxation characteristics of polyamide-12 (polydodecalactam), plasticized by sulphonamides of the type RSO2NHC4H9 (where R is phenyl, β-naphthyl, 3-pyridyl or 8-quinolyl), were studied over a wide range of temperatures and frequencies (−100°C to + 100°C and 0.5–200 kHz). The glass temperature and relaxation time were determined, and the
A.I. Suvorova +4 more
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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
Y. Zhang +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
Y. Zhang +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 ...
G. Goldbach +3 more
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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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Resin transfer moulding of anionically polymerised polyamide 12
Composites Part A: Applied Science and Manufacturing, 2005Liquid composite moulding of Lactam 12 monomer and activating system (APLC12) into satin weave carbon fabrics is investigated, with emphasis on minimising the void content in the final part. The main sources for void formation are identified. The solidification shrinkage is quantified to account for at most 9% in the matrix. Optimal flow conditions are
Michaud, V. +4 more
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One‐pot synthesis of polyamide 12,T–polyamide‐6 block copolymers
Journal of Polymer Science Part A: Polymer Chemistry, 2011AbstractPolyamide 12,T–polyamide‐6 (PA‐12,T–PA‐6) block copolymers were synthesized by anionic polymerization of caprolactam using a PA‐12,T macrocoinitiator (McI). PA‐12,T McI and its precursors are soluble in molten caprolactam allowing for both the McI step‐growth polymerization and anionic polymerization to be performed in one‐pot.
Theodore F. Novitsky, Lon J. Mathias
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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
A.J. Cano, A. Salazar, J. Rodríguez
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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
A.J. Cano, A. Salazar, J. Rodríguez
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Orientation of the lamellar crystals in polyamide 12
Polymer, 1993Three types of oriented samples of polyamide 12 have been investigated by electron microscopy, and small- and wide-angle X-ray diffraction: (a) sedimented mats of single crystals obtained by filtration from dilute solution; (b) melt crystallized samples oriented by unidirectional rolling and; (c) samples obtained by extrusion just below their melting ...
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