Performance properties and structure of electrochemically aged polypropylene with a dye addition

• Autorzy: Gnatowski A. , Wawrzyniak J. , Jaruga T.
• Języki publikacji: EN

Abstrakty

EN

Purpose: Determination of the influence of a dye addition and electrochemical ageing on the change of dynamic mechanical properties, investigated by DMTA method for samples made of polypropylene was the aim of this work. The investigation of crystallinity degree using DSC method as well as the investigation of the structure using optical microscopy have been made. Hardness by ball indentation method, Shore hardness, Vicat softening point and water absorptivity were tested. Design/methodology/approach: Investigation using DMTA method was carried out for samples subjected to one-axial bending. The change in the value of the storage modulus E' and the mechanical loss factor (tangent ?) in function of the temperature and oscillation frequency in DMTA tests were determined. In order to verify the change of thermal properties of PP with 2% of dye addition, before and after electrochemical ageing, the investigation using DSC method was made. Findings: Higher values of the storage modulus occurred for the samples with dye addition. The crystallinity degree values were lower for the samples after electrochemical ageing. It was found that electrochemical ageing results in decrease in hardness values and Vicat softening temperature while increase in water absorptivity was noticed. Research limitations/implications: Dynamic properties of polypropylene with the dye addition were determined in one-axial bending test. In real application, the parts manufactured from this material can be subjected to more complex load. Practical implications: The investigation results let know about dyed polypropylene behaviour after ageing, what can be useful in practice, when selecting the material for parts that will have to work in conditions of electrochemical ageing. Originality/value: In order to estimate the polymer behaviour in different thermal conditions, dependences of the storage modulus and the mechanical loss factor were determined in function of temperature in one-axial bending.

Słowa kluczowe

EN

engineering polymers; mechanical properties; thermal properties

PL

polimery; właściwości mechaniczne; właściwości termiczne

• Wydawca: International OCSCO World Press
• Czasopismo: Archives of Materials Science and Engineering
• Rocznik: 2010
• Tom: Vol. 41, nr 1
• Strony: 37--44
• Opis fizyczny: Bibliogr. 28 poz.

Twórcy

autor

Gnatowski A.

autor

Wawrzyniak J.

autor

Jaruga T.

• Department of Polymer Processing and Production Management, Czestochowa University of Technology, Al. Armii Krajowej 19c, 42-200 Częstochowa, Poland,

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