scholarly journals Enhanced Thermal Performance and Impact Strength of UHMWPE/Recycled-PA6 Blends Synthesized via a Melting Extrusion Route

2016 ◽  
Vol 2016 ◽  
pp. 1-5 ◽  
Author(s):  
Xiuying Yang ◽  
Junye Cheng ◽  
Guangping Zheng ◽  
Deqing Zhang
Keyword(s):  
Impact Strength ◽  
Charpy Impact ◽  
Softening Temperature ◽  
Polyamide 6 ◽  
Chemical Components ◽  
Infrared Microspectroscopy ◽  
Heat Distortion Temperature ◽  
Fourier Transform Infrared Microspectroscopy ◽  
Izod Impact ◽  
Obvious Phase Separation

The blends of ultra-high molecular weight polyethylene (UHMWPE) and recycled-polyamide 6 (R-PA6) were prepared via a melting extrusion route using high-density polyethylene-graft-maleic anhydride (HDPE-g-MAH) as the compatibilizer. The morphologies and distributions of the chemical components of the blends were characterized by scanning electron microscopy and synchrotron Fourier transform infrared microspectroscopy. The effects of R-PA6 content on the Vicat softening temperature (VST), heat distortion temperature (HDT), and impact strength of the blends were studied. Remarkably, in comparison with those of UHMWPE, the VST and HDT of UHMWPE/R-PA6 blends with 44 wt% R-PA6 were increased to 165.1 and 98.4°C, respectively, and the Charpy impact strength and Izod impact strength of the blends were enhanced to 33.9 and 16.2 kJ/m2, respectively. In addition, it was found that the blending system containing 44 wt% R-PA6 and 48 wt% UHMWPE exhibited the best compatibility when it was prepared using 8 wt% HDPE-g-MAH. The distribution of the phases of UHMWPE and R-PA6 was uniform, and no obvious phase separation was observed in the blends.

scholarly journals The Effect of Crystallinity on the Toughness of Cast Polyamide 6 Rods with Different Diameters

Polymers ◽  
2020 ◽  
Vol 12 (2) ◽  
pp. 293
Author(s):  
Miklós Odrobina ◽  
Tamás Deák ◽  
László Székely ◽  
Tamás Mankovits ◽  
Róbert Zsolt Keresztes ◽  
...  
Keyword(s):  
Impact Strength ◽  
Impact Test ◽  
Charpy Impact ◽  
Polyamide 6 ◽  
Degree Of Crystallinity ◽  
Scanning Calorimetry ◽  
Tensile Impact ◽  
Different Diameters ◽  
The Impact ◽  
The Degree Of Crystallinity

The present paper concentrates on the toughness and the degree of crystallinity of the magnesium-catalyzed polyamide 6 rods cast in different diametres, which are commonly used for gear manufacturing. Its toughness cannot be regarded as a constant feature due to the casting technology. The mechanical properties of the semi-finished products are sensitive to the manufactured dimension, e.g., cast diameter, which are investigated by the Charpy impact test and tensile impact test. It is generally accepted that the impact strength and tensile-impact strength correlate with the degree of crystallinity beside many other material’s feature. Crystallinity is evaluated by Differential Scanning Calorimetry. The aim of this study is to determine the relationship between toughness and crystallinity of the magnesium-catalyzed cast PA6 rods with different diameters. For the research cast rods between 40 and 300 mm diameter were selected in seven-dimensional steps. Based on the results, it was found that the toughness depends strongly on the diameter size. Furthermore, it is proved that the crystallinity explains 62.3% of the variation of the Charpy’s impact strengths, while the tensile impact method was not suitable to detect the difference between the test samples.

Use of Glass Particles from Recovered LCD Screen Components as Fillers for Polyamide-6

2014 ◽  
Vol 798-799 ◽  
pp. 628-631
Author(s):  
Natalia Massaro ◽  
Douglas Morais ◽  
Samuel Marcio Toffoli ◽  
Ticiane Sanches Valera
Keyword(s):  
Electron Microscopy ◽  
Tensile Strength ◽  
Impact Strength ◽  
Polyamide 6 ◽  
Particle Sizes ◽  
Loss On Ignition ◽  
The Matrix ◽  
Izod Impact ◽  
The One ◽  
Scanning Electron

Glass from computers’ LCD monitor screens were recovered, ground and used as filler for Polyamide-6. The composites contained 10 wt% of glass particles. Two particle sizes were tested: glass particles smaller than 106 μm (ABNT#150 sieve) and smaller than 53 μm (ABNT#270 sieve). The filler was evaluated by loss on ignition and the composites by tensile strength and Izod impact strength. The morphology was characterized by scanning electron microscopy (SEM). The value of Young’s modulus of composites processed with glass particles smaller than 53 μm was higher than the one for PA-6. The properties of impact strength, tensile strength, and elongation of PA-6 were reduced with the addition of filler, and the composite containing glass particles smaller than 53 μm showed the lowest reduction in mechanical properties (about 6% in the tensile strength and about 48% in impact strength). The micrographs of fracture surfaces of tensile strength specimens showed weak adhesion particle/matrix and uniform distribution of the particles in the matrix, especially in the composite with finest particle sizes.

Simulation of the Mechanical Behavior of Nanodispersed Elastomer Particle-Modified Polyamide 6

2013 ◽  
Vol 746 ◽  
pp. 250-255
Author(s):  
Jing Wiedmaier ◽  
Ulrich Weber ◽  
Siegfried Schmauder
Keyword(s):  
Impact Strength ◽  
Cell Model ◽  
Three Dimensional ◽  
Charpy Impact ◽  
Polyamide 6 ◽  
Charpy Impact Test ◽  
Material Behaviour ◽  
Embedded Unit ◽  
Copolymer Particle ◽  
Good Agreement

In this work the nanodispersed elastomer copolymer particle-modified polyamide 6 (PA 6) is investigated. Micromechanical modelling is proposed to predict the mechanical behaviour of this material up to failure. A three-dimensional self-consistent embedded unit cell model is chosen which has been well applied for simulating the elastoplasticdeformation of this PA 6-composite [1,. This model will be here modified with the consideration of debonding between the elastomer particles and the PA 6-matrix. The predictions are in very good agreement with the experimental results. In terms of crash behavior, e.g. in the automotive industry the material behaviour under dynamic loading is also of particular interest. Impact strength is one of the most important parameters for describing this material behaviour. A full three-dimensional dynamic simulation of V-notched Charpy impact test is performed in ABAQUS/Explicit. The calculated impact strength coincides plausibly well with the experimental determination.

Impact fracture toughness and morphology of polypropylene/Mg(OH)2 composites

2013 ◽  
Vol 33 (8) ◽  
pp. 721-725 ◽  
Author(s):  
Ji-Zhao Liang ◽  
Feng-Jiao Li
Keyword(s):  
Impact Strength ◽  
Charpy Impact ◽  
Weight Fraction ◽  
Impact Fracture ◽  
Increase With Increase ◽  
Impact Fracture Behavior ◽  
Twin Screw ◽  
Izod Impact ◽  
Charpy Impact Strength ◽  
The Impact

Abstract Magnesium hydroxide [Mg(OH)2] with high flame retardant efficiency filled polypropylene (PP) composites were prepared using a twin-screw extruder. The impact fracture behavior of the composites was measured at room temperature. It was found that the toughening effect of the filler content on the PP resin was significant. The V-notched Izod impact strength of the PP/Mg(OH)2 composites showed a nonlinear increase with increase in filler weight fraction (ϕf), as ϕf was <15%, and then it decreased slightly; When ϕf was <15%, the V-notched Charpy impact strength of the PP/Mg(OH)2 composite also increased nonlinearly, then it decreased slightly. The impact fracture surface was observed by means of a scanning electronic microscope, to understand the toughening mechanisms for the composite systems.

Sign in / Sign up

Export Citation Format

Share Document