scholarly journals OBTAINING TECHNOLOGY FOR NANOCOMPOSITES BASED ON POLYAMIDE-6 AND ORGANOMODIFIED MONTMORILLONITE

2018 ◽  
Vol 26 (1) ◽  
pp. 9-19
Author(s):  
Kostyantyn M Sukhyy ◽  
Elena A Belyanovskaya ◽  
Mikhaylo P. Sukhyy ◽  
Vitaliy I. Tomilo ◽  
Roman D. Lytovchenko
Keyword(s):  
Injection Molding ◽  
Thermal Behavior ◽  
Phase Formation ◽  
Polyamide 6 ◽  
Technological Parameters ◽  
Crystallinity Degree ◽  
Modified Montmorillonite ◽  
Mechanical Mixtures ◽  
Organomodified Montmorillonite

The obtaining technology of nanocomposites based on polyamide-6 and organomodified montmorillonite is developed. The technological parameters of extrusion and injection molding, and their influence on the formation of nanoscale inorganic phase of the polyamide are investigated. Morphology and thermal behavior of polyamide-6, composites based on polyamide-6 and modified montmorillonite are studied by WAXS, XRD, DTA and DSC data. Morphology and thermal behavior of polyamide-6 and composites based on polyamide-6 and modified montmorillonite are shown to be in a strong juxtaposition. New γ-phase formation is revealed in composite polyamide-6 – 1–2 % of modified montmorillonite in contrast with polyamide-6 and mechanical mixtures of polyamide-6 and montmorillonite. Optimal concentrations of modified montmorillonite in the composites stated as 1 – 2 % are shown to correspond with composites improved properties as compared to initial polyamide-6. It is explained by increasing crystallinity degree, which resulted from acting of modified montmorillonite particles as nucleation heterogenetic agents.

Determination of Optimum Process Parameters in Gas-Assisted Injection Molding

2011 ◽  
Vol 143-144 ◽  
pp. 494-498
Author(s):  
Ke Ming Zi ◽  
Li Heng Chen
Keyword(s):  
Injection Molding ◽  
Delay Time ◽  
Optimization Design ◽  
Gas Pressure ◽  
Optimum Process ◽  
Injection Molding Process ◽  
Technological Parameters ◽  
Molding Process ◽  
Element Analysis ◽  
Melt Temperature

With finite element analysis software Moldflow, numerical simulation and studies about FM truck roof handle were conducted on gas-assisted injection molding process. The influences of melt pre-injection shot, gas pressure, delay time and melt temperature were observed by using multi-factor orthogonal experimental method. According to the analysis of the factors' impact on evaluation index, the optimized parameter combination is obtained. Therefore the optimization design of technological parameters is done. The results show that during the gas-assisted injection molding, optimum pre-injection shot is 94%,gas pressure is 15MPa,delay time is 0.5s,melt temperature is 240 oC. This study provided a more practical approach for the gas-assisted injection molding process optimization.

Effects of molding on property of thermally conductive and electrically insulating polyamide 6–based composite

2018 ◽  
Vol 32 (9) ◽  
pp. 1190-1203 ◽  
Author(s):  
Xuping Yang ◽  
Wenbin Yang ◽  
Jinghui Fan ◽  
Juying Wu ◽  
Kai Zhang
Keyword(s):  
Thermal Conductivity ◽  
Tensile Strength ◽  
Injection Molding ◽  
Annealing Time ◽  
Polyamide 6 ◽  
Molding Pressure ◽  
Hot Press ◽  
Molding Method ◽  
Thermally Conductive ◽  
Press Molding

Thermally conductive and electrically insulating polyamide 6 (PA6) matrix quaternary composites were prepared by hot press molding and injection molding, respectively. The quaternary composites were composed of zero-dimensional aluminum oxide particle, one-dimensional silicon carbide whisker, two-dimensional flake graphite, and PA6 resin matrix. Morphology, structure, density, thermal conductivity, volume electrical resistivity, and tensile strength of two types of composites were characterized by scanning electron microscopy, X-ray diffractometer, thermal conductivity tester, high resistance micro-current tester, and tensile tester. The results showed that crystallinity, thermal conductivity, density, and tensile strength of hot press molding samples were superior to those of samples made by injection molding method. This is due to that hot press molding method can provide higher molding pressure and longer annealing time than injection molding. The mechanism could be explained that the performances of the composites were promoted by increasing molding pressure and annealing time.

Investigation the Ultrasonic Injection Molding of Polyamide 6

2021 ◽  
pp. 41-48
Author(s):  
Thanh-Hai Nguyen ◽  
Tran Long Vu ◽  
Vo Van Duy Phong ◽  
Tra Ngoc Tien Dat ◽  
Anh Van Nguyen ◽  
...  
Keyword(s):  
Injection Molding ◽  
Polyamide 6

The Effect of Polyethylene-Octene Elastomer on the Morphological and Mechanical Properties of Polyamide 6/Polypropylene Nanocomposites

2005 ◽  
Vol 13 (8) ◽  
pp. 795-805 ◽  
Author(s):  
M.U. Wahit ◽  
A. Hassan ◽  
Z.A. Mohd Ishak ◽  
A. Abu Bakar
Keyword(s):  
Mechanical Properties ◽  
Polyamide 6 ◽  
X Ray Diffraction ◽  
X Ray ◽  
Melt Compounding ◽  
Modified Montmorillonite ◽  
Polypropylene Nanocomposites ◽  
Rubber Toughened ◽  
Izod Impact ◽  
Pp Blends

Rubber-toughened nanocomposites (RTNC) consisting of ternary blends of polyamide 6 (PA6), polypropylene (PP) and polyethylene-octene elastomer (POE) containing 4 wt% of organophilic modified montmorillonite were produced by melt compounding followed by injection moulding. The blend composition was kept constant (PA6/PP=70/30 parts by weight) while the POE content was varied between 5 and 20 wt%. Maleated PP (PP-g-MA) was used as compatibilizer. The morphology of the RTNC was studied by scanning electron microscopy and X-ray diffraction (XRD). The mechanical properties of RTNC were studied through tensile, flexural, Izod impact and fracture toughness properties. While the tensile and flexural properties were found to decrease with the increasing concentration of POE, the toughness was significantly enhanced as compared to the neat PA6/PP blends. In general, the blends containing 10-15 wt% of POE had the best balance of stiffness, strength and toughness. The addition of 30 wt% of PP in the PA6 matrix improved the compatibility between PA6 and the rubber phase. XRD established that the organoclay was well dispersed (exfoliated) and preferentially embedded in the PA6 phase.

Visualization of particles arrangement during filling stage of polyamide 6 - metal insert injection molding

2019 ◽  
Vol 59 (s2) ◽  
pp. E271-E278 ◽  
Author(s):  
Karol Bula ◽  
Justyna Szymańska ◽  
Tomasz Sterzyński ◽  
Adam Piasecki ◽  
Roman Wróblewski
Keyword(s):  
Injection Molding ◽  
Polyamide 6 ◽  
Metal Insert ◽  
Filling Stage

Influence of Technological Parameters on Material Flow

2015 ◽  
Vol 1120-1121 ◽  
pp. 1194-1197 ◽  
Author(s):  
Michal Stanek ◽  
David Manas ◽  
Miroslav Manas ◽  
Vojtech Senkerik ◽  
Adam Skrobak ◽  
...  
Keyword(s):  
Injection Molding ◽  
Injection Pressure ◽  
Polymer Processing ◽  
Injection Rate ◽  
Cavity Surface ◽  
Injection Molding Process ◽  
Technological Parameters ◽  
Molding Process ◽  
Processing Technologies

Injection molding is one of the most extended polymer processing technologies. It enables the manufacture of final products, which do not require any further operations. The tools used for their production – the injection molds – are very complicated assemblies that are made using several technologies and materials. Delivery of polymer melts into the mold cavity is the most important stage of the injection molding process. The fluidity of polymers is affected by many parameters Inc. mold design. Evaluation of set of data obtained by experiments in which the testing conditions were widely changed shows that the quality of cavity surface and technological parameters (injection rate, injection pressure and gate size) has substantial influence on the length of flow.

scholarly journals Influence of Polymer-Silicate Nucleator on the Structure and Properties of Polyamide 6

2020 ◽  
Vol 14 (4) ◽  
pp. 496-503
Author(s):  
Volodymyr Levytskyi ◽  
◽  
Andrii Masyuk ◽  
Diana Katruk ◽  
Rafał Kuzioła ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Crystallite Size ◽  
Softening Point ◽  
Surface Hardness ◽  
Chemical Properties ◽  
Polyamide 6 ◽  
Structure And Properties ◽  
Crystallinity Degree ◽  
Physico Chemical ◽  
Silicate Materials

Physico-chemical properties of developed nickel-containing modified silicate materials as the nucleators for composites based on polyamide 6 are presented. As it was established, additive of the nucleator modified by polyvinylpyrrolidone promotes the increase of crystallinity degree of polyamide 6 and the decrease of crystallite size. It was found that changes in the structure of the material cause the increase of its tensile strength, surface hardness and Vicat softening point.

scholarly journals ОСОБЛИВОСТІ ПЕРЕРОБКИ НАПОВНЕНИХ ПОЛІАМІДНИХ КОМПОЗИЦІЙ МЕТОДОМ ЛИТТЯ ПІД ТИСКОМ

2020 ◽  
Vol 140 (6) ◽  
pp. 71-80
Author(s):  
С. В. Пристинський ◽  
Ю. О. Будаш ◽  
В. І. Ступа ◽  
І. О. Пустовойт
Keyword(s):  
Comparative Analysis ◽  
Impact Strength ◽  
Injection Molding ◽  
Process Parameters ◽  
Polymer Composition ◽  
Injection Molding Process ◽  
Composition Material ◽  
Technological Parameters ◽  
Polyamide 6.6 ◽  
The Impact

Comparative analysis the main parameters of injection molding and the physic-mechanicals properties of polymer compositions based on polyamide 6.6. Samples we had obtained by injection molding method at injection molding machine ENGEL E-MAC 170/75. The process parameters had determined empirically to achieve certain quality criteria. Physics and mechanicals properties had evaluated by Sharpy impact strength. Statistical data processing, construction of graphs and diagrams had done in MS Excel. During the researching, had done a comparative analysis of the main parameters of the injection molding process, physical and mechanical properties, such as impact strength of the samples obtained from the glass-filled polymer composition based on polyamide PA6.6-GFGB30 and the material without glass filler PA6.6. During the experiment and data, analysis had revealed an increase in the impact strength of samples by 43%, cast from polymeric composition material PA6.6-GFGB30 in comparison with PA6.6. At the same time the process parameters such as the temperature, which directly affects the energy resources consumption, did not receive statistically significant changes. Among the features of changes in process parameters, we can note an increase in switching pressure, a decrease in the dosing time, and others. In addition, the speed and linear values of the process have changed. For the first time had performed a detailed comparative analysis the main processing parameters by injection molding and the physic-mechanicals properties of polymer compositions based on polyamide 6.6. The results will allow a professional approach to the selection of polymer compositions and technological parameters the process of their processing by injection molding.

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