Factors and processes determining the impact resistance of PP impact copolymers with multi-phase structure
The impact resistance of four polypropylene impact copolymers (ICPs) with multi-phase structures and widely differing characteristics was related to their structure. Blends were prepared from one of them and a high-density polyethylene (HDPE) to improve impact strength further. The structure of the...
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| Main Authors: | , , , , , , , , |
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| Format: | Article |
| Language: | English |
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Budapest University of Technology and Economics
2024-04-01
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| Series: | eXPRESS Polymer Letters |
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| Online Access: | http://www.expresspolymlett.com/letolt.php?file=EPL-0012842&mi=cd |
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| author | Milán Ferdinánd Michael Jerabek Róbert Várdai Emese Pregi Thomas Lummerstorfer Markus Gahleitner Gábor Faludi János Móczó Béla Pukánszky |
| author_facet | Milán Ferdinánd Michael Jerabek Róbert Várdai Emese Pregi Thomas Lummerstorfer Markus Gahleitner Gábor Faludi János Móczó Béla Pukánszky |
| author_sort | Milán Ferdinánd |
| collection | DOAJ |
| description | The
impact resistance of four polypropylene impact copolymers (ICPs) with
multi-phase structures and widely differing characteristics was related to
their structure. Blends were prepared from one of them and a high-density
polyethylene (HDPE) to improve impact strength further. The structure of the
materials was characterized by microscopy and dynamic mechanical thermal
analysis. Mechanical properties were determined by tensile and impact testing,
while local deformation processes were followed by volume strain measurements.
The results obtained in the study proved that the shear-yielding of the matrix
contributes the most among local processes to the increase of impact strength,
while cavitation has a small effect on this latter property since its energy
absorption is negligible. Both increasing elastomer content and decreasing
particle size favor shear-yielding, thus improving impact strength. Considering
the importance of elastomer content and elastomer particle size, a simple but
very good model was created describing the dependence of the impact strength of
ICPs on these latter two factors by using linear regression analysis. Although
the addition of HDPE increases the fracture resistance of ICPs further, the
extent of improvement is moderate, and the approach is economically
disadvantageous. |
| format | Article |
| id | doaj-art-804c98fffa9e4be5a844514d2282c553 |
| institution | Kabale University |
| issn | 1788-618X |
| language | English |
| publishDate | 2024-04-01 |
| publisher | Budapest University of Technology and Economics |
| record_format | Article |
| series | eXPRESS Polymer Letters |
| spelling | doaj-art-804c98fffa9e4be5a844514d2282c5532025-08-20T03:34:02ZengBudapest University of Technology and EconomicseXPRESS Polymer Letters1788-618X2024-04-0118440641910.3144/expresspolymlett.2024.30Factors and processes determining the impact resistance of PP impact copolymers with multi-phase structureMilán FerdinándMichael JerabekRóbert VárdaiEmese PregiThomas LummerstorferMarkus GahleitnerGábor FaludiJános MóczóBéla PukánszkyThe impact resistance of four polypropylene impact copolymers (ICPs) with multi-phase structures and widely differing characteristics was related to their structure. Blends were prepared from one of them and a high-density polyethylene (HDPE) to improve impact strength further. The structure of the materials was characterized by microscopy and dynamic mechanical thermal analysis. Mechanical properties were determined by tensile and impact testing, while local deformation processes were followed by volume strain measurements. The results obtained in the study proved that the shear-yielding of the matrix contributes the most among local processes to the increase of impact strength, while cavitation has a small effect on this latter property since its energy absorption is negligible. Both increasing elastomer content and decreasing particle size favor shear-yielding, thus improving impact strength. Considering the importance of elastomer content and elastomer particle size, a simple but very good model was created describing the dependence of the impact strength of ICPs on these latter two factors by using linear regression analysis. Although the addition of HDPE increases the fracture resistance of ICPs further, the extent of improvement is moderate, and the approach is economically disadvantageous.http://www.expresspolymlett.com/letolt.php?file=EPL-0012842&mi=cd injection moulding copolymers elastomer impact behaviour failure modeling |
| spellingShingle | Milán Ferdinánd Michael Jerabek Róbert Várdai Emese Pregi Thomas Lummerstorfer Markus Gahleitner Gábor Faludi János Móczó Béla Pukánszky Factors and processes determining the impact resistance of PP impact copolymers with multi-phase structure eXPRESS Polymer Letters injection moulding copolymers elastomer impact behaviour failure modeling |
| title | Factors and processes determining the impact resistance of PP impact copolymers with multi-phase structure |
| title_full | Factors and processes determining the impact resistance of PP impact copolymers with multi-phase structure |
| title_fullStr | Factors and processes determining the impact resistance of PP impact copolymers with multi-phase structure |
| title_full_unstemmed | Factors and processes determining the impact resistance of PP impact copolymers with multi-phase structure |
| title_short | Factors and processes determining the impact resistance of PP impact copolymers with multi-phase structure |
| title_sort | factors and processes determining the impact resistance of pp impact copolymers with multi phase structure |
| topic | injection moulding copolymers elastomer impact behaviour failure modeling |
| url | http://www.expresspolymlett.com/letolt.php?file=EPL-0012842&mi=cd |
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