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1
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New Unconventional Processes of Plastic Forming of the Internal Toothing of Coupling Spline Sleeves

100%
Michalczyk J., Wiewiórowska S., Michalczyk J., Wiewiórowska S.
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vol. 65
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issue 1
2
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A Study on Polymer Particle Flow in a Disk Zone of a Screw-Disk Extruder

100%
Rydzkowski T., Michalska-Pożoga I.
Chemical and Process Engineering
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2014
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issue 1
3
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A Study on Polymer Particle Flow in a Disk Zone of a Screw-Disk Extruder

100%
Rydzkowski T., Michalska-Pożoga I.
Chemical and Process Engineering
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2014
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vol. 35
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issue 1
121-135
EN
The paper presents the summary of research on polymer melt particle motion trajectories in a disc zone of a screw-disk extruder. We analysed two models of its structure, different in levels of taken simplifications. The analysis includes computer simulations of material particle flow and results of experimental tests to determine the properties of the resultant extrudate. Analysis of the results shows that the motion of melt in the disk zone of a screw-disk extruder is a superposition of pressure and dragged streams. The observed trajectories of polymer particles and relations of mechanical properties and elongation of the molecular chain proved the presence of a stretching effect on polymer molecular chains.
4
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Manufacturing lead time prediction for extrusion tools with the use of neural networks

89%
Sajko N., Kovacic S., Ficko M., Palcic I., Klancnik S., Sajko N., Kovacic S., Ficko M., Palcic I., Klancnik S.
Management and Production Engineering Review
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2020
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vol. 11
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issue 3
5
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Determination of biodegradation rate of carrier for microorganism immobilization fabricated based on starch

88%
Tomaszewska-Ciosk E., Golachowski A., Zdybel E.
Polish Journal of Chemical Technology
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2013
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vol. 15
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issue 3
110-114
EN
The study was aimed on the determination of biodegradation rate of extruded starch carriers, with or without immobilized microorganisms in diversified storage conditions. The research was conducted on potato starch, in which Saccharomyces cerevisiae yeast cells were immobilized. Preparations with and without yeasts were than placed for 84 days in the environments of: light soil, heavy soil, compost, water and activated sludge. After 0, 7, 14, 21, 49 and 84 days of storage the preparations were perfused with water and analyzed. In the recovered samples the following tests were carried out: the force causing fracture, the elongation caused by the mentioned force, the mass and the diameter of the carrier. Due to the degradation the size and the mechanical properties of the samples were decreased. The rate of the degradation was strongly dependent on the environment of the storage. The fastest degradation of the carriers were observed for compost and heavy soil, while the slowest biodegradation was observed for the samples placed in the water environment. The rate of biodegradation was also influenced by the Saccharomyces cerevisiae yeasts. The rate of biodegradation was faster in the samples containing yeast cells, than in the extrudates without the microorganisms.
6
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Effect of Apple and Rosehip Pomaces on Colour, Total Phenolics and Antioxidant Activity of Corn Extruded Snacks

88%
Drożdż W., Tomaszewska-Ciosk E., Zdybel E., Boruczkowska H., Boruczkowski T., Regiec P.
Polish Journal of Chemical Technology
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2014
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vol. 16
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issue 3
7-11
EN
Extrusion cooking technology was applied for obtaining corn extrudates fortified with various level (10-20%) of rosehip pomace powder or apple pomace powder. The total polyphenols content, antioxidant activities (ABTS), organoleptic properties and colour of the extrudates were determined. Pomace addition increased the level of total polyphenols content and antioxidant activity in obtained corn - pomace extrudates, especially in samples enriched with rosehip pomace. Extrudates with 20% of rosehip pomace addition characterized the highest polyphenols content and antioxidant activity. Only the slight decrease of some quality features - shape and size, taste and fl avour, structure and colour of obtained extrudates was observed. Sample with fruit pomace addition showed increasing consistency evaluation. The extruded products by utilising fruit by-products got good evaluation of panelists and can be an excellent source of bioactive compounds in the daily human diet.
7
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Study of Extrusion Temperature on Extrudability of Al-Zn-Cu Based Alloy

88%
Kim Y.-H., Yoo H.-S., Lee K.-S., Lee S.-H., Son H.-T., Kim Y.-H., Yoo H.-S., Lee K.-S., Lee S.-H., Son H.-T.
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vol. 65
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issue 4
8
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Effect of Al/Cu Weight Fraction on the Mechanical and Electrical Properties of Al-Cu Conductors for Overhead Transmission Lines

75%
Han D., Kim G.-H., Kim J., Ahn B., Han D., Kim G.-H., Kim J., Ahn B.
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9
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Effect of Fe Content on the Mechanical Properties and Thermal Conductivity of the Al-RE Alloys

75%
Yoo H.-S., Kim Y.-H., Son H.-T., Yoo H.-S., Kim Y.-H., Son H.-T.
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10
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Studies of properties of polypropylene/halloysite composites

63%
Szczygielska A., Kijeński J.
Polish Journal of Chemical Technology
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2011
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vol. 13
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issue 3
61-65
EN
The results of the studies on the synthesis, mechanical and thermal properties of polypropylene composites with various amount of halloysite filler are presented. Halloysite (HNT) belongs to the silica type characterized by a two-layer 1:1 structure. This work was aimed to develop a method for the modification of halloysite in its prime use as a filler for polypropylene by extrusion. The composites contain 1, 3, 5 and 7 wt.% of HNT. The degree of crystallinity of the composites decrease with increasing halloysite content. The results confirm the expectations that composites of interesting physicochemical, mechanical and thermal properties can be obtained. The mechanical properties studied show that the filler modification method used leads to the synthesis of polymer composites of improved thermal and mechanical properties.
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