Tribological and micro-mechanical properties of injected polypropylene modified by electron radiation

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F70883521%3A28110%2F23%3A63569600" target="_blank" >RIV/70883521:28110/23:63569600 - isvavai.cz</a>

Result on the web

<a href="https://www.mdpi.com/2075-4442/11/7/296" target="_blank" >https://www.mdpi.com/2075-4442/11/7/296</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3390/lubricants11070296" target="_blank" >10.3390/lubricants11070296</a>

Result language

angličtina

Original language name

Tribological and micro-mechanical properties of injected polypropylene modified by electron radiation

Original language description

Today, more and more importance is given to the improvement of polymer materials&apos; wear resistance, i.e., their micro-mechanical and tribological properties, which could widen their application in practice. The properties of materials can be modified by several methods, among them exposure to electron radiation. This study focuses on the effect of varying radiation intensity (15 kGy to 99 kGy), depth of penetration, and subsequent structure modification of injection-molded polypropylene on tribological and micro-mechanical properties. Electron radiation influences the structure of individual layers, thus improving or degrading their properties. Hence, the depth of penetration can be examined by instrumented hardness tests and scratch tests. Due to irradiation, surface properties and wear resistance increased by up to 105% (from 38 MPa to 78 MPa). As the results show, an increase in mechanical properties was recorded in the direction towards the center of the sample (from 72 MPa to 82 MPa). Micro-mechanical tests were also confirmed by the observation of cross-linking changes (gel test) as well as crystallinity increases (wide-angle X-ray diffraction and microtome cuts). This finding could have a significant effect on the manufacturing and subsequent modification of injection-molded polypropylene parts, which opens new possibilities in practice for this material. The increased surface wear resistance enables the use of parts for which the durability and abrasion resistance of the surface are demanded, especially in applications facing exposure to long-term cyclical loads (e.g., gears).

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

20301 - Mechanical engineering

Project

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Continuities

S - Specificky vyzkum na vysokych skolach

Publication year

2023

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Lubricants

ISSN

2075-4442

e-ISSN

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Volume of the periodical

11

Issue of the periodical within the volume

7

Country of publishing house

CH - SWITZERLAND

Number of pages

17

Pages from-to

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UT code for WoS article

001038572700001

EID of the result in the Scopus database

2-s2.0-85166335114