Structural Changes and Electrodynamic Effects in Polymers under Fast Uniaxial Compression

Rheological explosion in polymers under uniaxial compression in an open volume occurs at the end of continuous rapid plastic deformation after several stages of creep. Two types of polymers were chosen for this study: brittle glassy amorphous polystyrene and thermoplastic semi-crystalline polypropyl...

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Bibliographic Details
Published in:Chinese journal of polymer science 2021-05, Vol.39 (5), p.601-609
Main Authors: Aleksandrov, Aleksey. I., Aleksandrov, Ivan A., Shevchenko, Vitaliy G., Ozerin, Aleksandr N.
Format: Article
Language:English
Subjects:
Characterization and Evaluation of Materials
Chemistry
Chemistry and Materials Science
Condensed Matter Physics
Creep (materials)
Electric pulses
Explosions
Industrial Chemistry/Chemical Engineering
Morphology
Plastic deformation
Polymer Sciences
Polymers
Polystyrene resins
Rheological properties
Rheology
Size distribution
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Summary:Rheological explosion in polymers under uniaxial compression in an open volume occurs at the end of continuous rapid plastic deformation after several stages of creep. Two types of polymers were chosen for this study: brittle glassy amorphous polystyrene and thermoplastic semi-crystalline polypropylene. Electric pulses were detected during explosion, and their spectra were analyzed with two models. X-ray diffraction methods were used to investigate changes in the structure and morphology of polymers during deformation and rheological explosion. The pores appear in polymer in this process, and their shape and size distribution were derived from X-ray experiments. The main reason for the formation of pores in polymer samples in rheological explosion experiments is the intense microshifts in the polymer volume under the action of high applied pressure.
ISSN:0256-7679
1439-6203
DOI:10.1007/s10118-021-2511-5