Apr 5, 2020   6:46 a.m. Miroslava
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prof. Ing. Pavol Sejč, PhD.
Identification number: 2300
University e-mail: pavol.sejc [at] stuba.sk
Profesor CSc.,PhD. - Institute of technologies and materials (FME)
External colleague - Institute of Production Technologies (MTF)

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Basic information

Basic information about a final thesis

Type of thesis: Bachelor thesis
Thesis title: Weldability of Polypropylene with a mixed proportion of recycled material
Written by (author): Ing. Eva Holičová
Department: Institute of technologies and materials (FME)
Thesis supervisor: prof. Ing. Pavol Sejč, PhD.
Opponent:prof. Ing. Ernest Gondár, PhD.
Final thesis progress:Final thesis was successfully defended.

Additional information

Additional information about the final thesis follows. Click on the language link to display the information in the desired language.

Language of final thesis:Slovak

Slovak        English

Title of the thesis: Weldability of Polypropylene with a mixed proportion of recycled material
Summary:Bachelor's thesis deals with the influence of the quantity recycled polypropylene weldability and mechanical properties of welds. The work is characterized by thermoplastic materials. Polypropylene is a compound resulting from polymerization of propylene. We know the 3 basic types of PP, which have their advantages and disadvantages in terms of heat resistance, brittleness, flexibility and toughness. In addition, they can be thermally processed. They can be welded, which is also affected by melt index and determines their general final use in everyday life, eg. in building industry, industry, households. Following are methods of recycling, weldability and welding thermoplastics. Properties of polypropylene with a mixed proportion of recycled material are different from the basic PP. Resort of my work was melt index, which takes in 25% recycled content a significant decrease. Despite of it, It can be welded, it mechanical properties show only a very small deviation from the original material. Welding technology is creating weld with good mechanical properties. There may appear defects of welds, which have their reasons- it can also be of poor quality separation before recycling. Defects welds are given in standard STN EN 14 728:2005 Deffects of welded joints of thermoplastics. Classification.
Key words:polypropylene, recycling, hot body welding, hot gas welding, weld defects and the causes

Current level of public release
access to digital copies of seminar papers and theses on-line via Internet after the lapse of 3 years from concluding this contract with no restrictions, incl. the right to provide sub-licence to a third person for study, scientific, educational and information purposes.

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