Microstructure and Crystallinity of oriented polyolefins
Apstrakt
The influence of orientation on polyolefins was studied in accordance with Peterlin’s molecular model of drawing. Isotactic polypropylene and low density, linear low density and high density polyethylenes were oriented via solid-state stretching at an elevated temperature. Orientation induced changes in the morphology were analyzed by optical and scanning electron microscopy. Differential scanning calorimetry and wide-angle X-ray diffraction were used to determine changes in the crystallinity where a two-stage evolution was revealed. The first stage is characterized by a significant increase in crystallinity while the following saturation occurs with a further draw ratio increase at the second one. The value of the critical draw ratio, which separates these two stages and corresponds to the transformation from the initial to the fully developed fibrillar structure, was influenced by the structural peculiarities of each polyolefin.
Ključne reči:
Polyolefines / Microstructure / crystallinityIzvor:
Program and the book of abstracts - IX Ninth Young Researchers’ Conference Materials Science and Engineering, December 20-22 2010, Belgrade, Serbia, 2010, 22-22Izdavač:
- Institute of Technical Sciences of the Serbian Academy of Sciences and Arts
Finansiranje / projekti:
- Hemijsko i strukturno dizajniranje nanomaterijala za primenu u medicini i inženjerstvu tkiva (RS-MESTD-Basic Research (BR or ON)-172026)
Institucija/grupa
IHTMTY - CONF AU - Mudrinić, Tihana AU - Miličević, Dejan AU - Leskovac, Andreja AU - Mitrić, Miodrag AU - Suljovrujić, Edin PY - 2010 UR - https://cer.ihtm.bg.ac.rs/handle/123456789/7004 AB - The influence of orientation on polyolefins was studied in accordance with Peterlin’s molecular model of drawing. Isotactic polypropylene and low density, linear low density and high density polyethylenes were oriented via solid-state stretching at an elevated temperature. Orientation induced changes in the morphology were analyzed by optical and scanning electron microscopy. Differential scanning calorimetry and wide-angle X-ray diffraction were used to determine changes in the crystallinity where a two-stage evolution was revealed. The first stage is characterized by a significant increase in crystallinity while the following saturation occurs with a further draw ratio increase at the second one. The value of the critical draw ratio, which separates these two stages and corresponds to the transformation from the initial to the fully developed fibrillar structure, was influenced by the structural peculiarities of each polyolefin. PB - Institute of Technical Sciences of the Serbian Academy of Sciences and Arts C3 - Program and the book of abstracts - IX Ninth Young Researchers’ Conference Materials Science and Engineering, December 20-22 2010, Belgrade, Serbia T1 - Microstructure and Crystallinity of oriented polyolefins SP - 22 EP - 22 UR - https://hdl.handle.net/21.15107/rcub_cer_7004 ER -
@conference{ author = "Mudrinić, Tihana and Miličević, Dejan and Leskovac, Andreja and Mitrić, Miodrag and Suljovrujić, Edin", year = "2010", abstract = "The influence of orientation on polyolefins was studied in accordance with Peterlin’s molecular model of drawing. Isotactic polypropylene and low density, linear low density and high density polyethylenes were oriented via solid-state stretching at an elevated temperature. Orientation induced changes in the morphology were analyzed by optical and scanning electron microscopy. Differential scanning calorimetry and wide-angle X-ray diffraction were used to determine changes in the crystallinity where a two-stage evolution was revealed. The first stage is characterized by a significant increase in crystallinity while the following saturation occurs with a further draw ratio increase at the second one. The value of the critical draw ratio, which separates these two stages and corresponds to the transformation from the initial to the fully developed fibrillar structure, was influenced by the structural peculiarities of each polyolefin.", publisher = "Institute of Technical Sciences of the Serbian Academy of Sciences and Arts", journal = "Program and the book of abstracts - IX Ninth Young Researchers’ Conference Materials Science and Engineering, December 20-22 2010, Belgrade, Serbia", title = "Microstructure and Crystallinity of oriented polyolefins", pages = "22-22", url = "https://hdl.handle.net/21.15107/rcub_cer_7004" }
Mudrinić, T., Miličević, D., Leskovac, A., Mitrić, M.,& Suljovrujić, E.. (2010). Microstructure and Crystallinity of oriented polyolefins. in Program and the book of abstracts - IX Ninth Young Researchers’ Conference Materials Science and Engineering, December 20-22 2010, Belgrade, Serbia Institute of Technical Sciences of the Serbian Academy of Sciences and Arts., 22-22. https://hdl.handle.net/21.15107/rcub_cer_7004
Mudrinić T, Miličević D, Leskovac A, Mitrić M, Suljovrujić E. Microstructure and Crystallinity of oriented polyolefins. in Program and the book of abstracts - IX Ninth Young Researchers’ Conference Materials Science and Engineering, December 20-22 2010, Belgrade, Serbia. 2010;:22-22. https://hdl.handle.net/21.15107/rcub_cer_7004 .
Mudrinić, Tihana, Miličević, Dejan, Leskovac, Andreja, Mitrić, Miodrag, Suljovrujić, Edin, "Microstructure and Crystallinity of oriented polyolefins" in Program and the book of abstracts - IX Ninth Young Researchers’ Conference Materials Science and Engineering, December 20-22 2010, Belgrade, Serbia (2010):22-22, https://hdl.handle.net/21.15107/rcub_cer_7004 .