Study of crystallization behaviour of electron beam irradiated polypropylene and high-density polyethylene
The influence of electron-beam irradiation on polypropylene (PP) and high-density polyethylene (HDPE) was investigated with a focus on crystallization. A high-temperature (200°C) creep test revealed that the HDPE gradually increased cross-linking density in the range 30–120 kGy, while the PP underwe...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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The Royal Society
2021-03-01
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| Series: | Royal Society Open Science |
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| Online Access: | https://royalsocietypublishing.org/doi/pdf/10.1098/rsos.202250 |
| _version_ | 1818873793136820224 |
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| author | Petr Svoboda Krunal Trivedi Karel Stoklasa Dagmar Svobodova Toshiaki Ougizawa |
| author_facet | Petr Svoboda Krunal Trivedi Karel Stoklasa Dagmar Svobodova Toshiaki Ougizawa |
| author_sort | Petr Svoboda |
| collection | DOAJ |
| description | The influence of electron-beam irradiation on polypropylene (PP) and high-density polyethylene (HDPE) was investigated with a focus on crystallization. A high-temperature (200°C) creep test revealed that the HDPE gradually increased cross-linking density in the range 30–120 kGy, while the PP underwent a chain scission which was quantitatively evaluated by gel permeation chromatography. The mechanical properties were measured in the range -150 to 200°C by a dynamic mechanical analysis. A small presence of C=C and C=O bonds was found in the irradiated PP by a Fourier transform infrared spectroscopy. Crystallization kinetics measured by differential scanning calorimetry and hot-stage optical microscopy results were influenced tremendously by irradiation for HDPE and to a lesser extent for PP. Irradiation caused a decrease in both the number of nucleation centres and the growth rate of individual spherulites. Crystallization was analysed in detail with the help of Hoffman–Lauritzen, Avrami and Arrhenius equations. Interestingly an increasing β-crystal formation with an increasing irradiation level was discovered for PP by X-ray diffraction. A generation of defects in the crystalline structure owing to irradiation was discussed. |
| first_indexed | 2024-12-19T13:00:21Z |
| format | Article |
| id | doaj.art-2911e61f070743fbbfcbccb9f044b393 |
| institution | Directory Open Access Journal |
| issn | 2054-5703 |
| language | English |
| last_indexed | 2024-12-19T13:00:21Z |
| publishDate | 2021-03-01 |
| publisher | The Royal Society |
| record_format | Article |
| series | Royal Society Open Science |
| spelling | doaj.art-2911e61f070743fbbfcbccb9f044b3932022-12-21T20:20:15ZengThe Royal SocietyRoyal Society Open Science2054-57032021-03-018310.1098/rsos.202250202250Study of crystallization behaviour of electron beam irradiated polypropylene and high-density polyethylenePetr SvobodaKrunal TrivediKarel StoklasaDagmar SvobodovaToshiaki OugizawaThe influence of electron-beam irradiation on polypropylene (PP) and high-density polyethylene (HDPE) was investigated with a focus on crystallization. A high-temperature (200°C) creep test revealed that the HDPE gradually increased cross-linking density in the range 30–120 kGy, while the PP underwent a chain scission which was quantitatively evaluated by gel permeation chromatography. The mechanical properties were measured in the range -150 to 200°C by a dynamic mechanical analysis. A small presence of C=C and C=O bonds was found in the irradiated PP by a Fourier transform infrared spectroscopy. Crystallization kinetics measured by differential scanning calorimetry and hot-stage optical microscopy results were influenced tremendously by irradiation for HDPE and to a lesser extent for PP. Irradiation caused a decrease in both the number of nucleation centres and the growth rate of individual spherulites. Crystallization was analysed in detail with the help of Hoffman–Lauritzen, Avrami and Arrhenius equations. Interestingly an increasing β-crystal formation with an increasing irradiation level was discovered for PP by X-ray diffraction. A generation of defects in the crystalline structure owing to irradiation was discussed.https://royalsocietypublishing.org/doi/pdf/10.1098/rsos.202250polymerirradiationcrystallizationspherulitebeta-phase |
| spellingShingle | Petr Svoboda Krunal Trivedi Karel Stoklasa Dagmar Svobodova Toshiaki Ougizawa Study of crystallization behaviour of electron beam irradiated polypropylene and high-density polyethylene Royal Society Open Science polymer irradiation crystallization spherulite beta-phase |
| title | Study of crystallization behaviour of electron beam irradiated polypropylene and high-density polyethylene |
| title_full | Study of crystallization behaviour of electron beam irradiated polypropylene and high-density polyethylene |
| title_fullStr | Study of crystallization behaviour of electron beam irradiated polypropylene and high-density polyethylene |
| title_full_unstemmed | Study of crystallization behaviour of electron beam irradiated polypropylene and high-density polyethylene |
| title_short | Study of crystallization behaviour of electron beam irradiated polypropylene and high-density polyethylene |
| title_sort | study of crystallization behaviour of electron beam irradiated polypropylene and high density polyethylene |
| topic | polymer irradiation crystallization spherulite beta-phase |
| url | https://royalsocietypublishing.org/doi/pdf/10.1098/rsos.202250 |
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