Thermal Diffusivity of High-Density Polyethylene Samples of Different Crystallinity Evaluated by Indirect Transmission Photoacoustics
Само за регистроване кориснике
2018
Аутори
Nešić, Mioljub V.Popović, Milan
Rabasović, Mihailo D.
Miličević, Dejan S.
Suljovrujić, Edin H.
Markushev, Dragan D.
Stojanović, Zoran A.
Чланак у часопису (Објављена верзија)
Метаподаци
Приказ свих података о документуАпстракт
In this work, thermal diffusivity of crystalline high-density polyethylene samples of various thickness, and prepared using different procedures, was evaluated by transmission gas-microphone frequency photoacoustics. The samples composition analysis and their degree of crystallinity were determined from the wide-angle X-ray diffraction, which confirmed that high-density polyethylene samples, obtained by slow and fast cooling, were equivalent in composition but with different degrees of crystallinity. Structural analysis, performed by differential scanning calorimetry, demonstrated that all of the used samples had different levels of crystallinity, depending not only on the preparing procedure, but also on sample thickness. Therefore, in order to evaluate the samples thermal diffusivity, it was necessary to modify standard photoacoustic fitting procedures (based on the normalization of photoacoustic amplitude and phase characteristics on two thickness levels) for the interpretation of p...hotoacoustic measurements. The calculated values of thermal diffusivity were in the range of the expected literature values. Besides that, the obtained results indicate the unexpected correlation between the values of thermal diffusivity and thermal conductivity with the degree of crystallinity of the investigated geometrically thin samples. The results indicate the necessity of additional investigation of energy transport in macromolecular systems, as well as the possible employment of the photoacoustic techniques in order to clarify its mechanism.
Кључне речи:
Crystallinity / HDPE / Multi-parameter fitting / Photoacoustics / Photothermal / ThermodynamicsИзвор:
International Journal of Thermophysics, 2018, 39, 2Финансирање / пројекти:
- Функционални, функционализовани и усавршени нано материјали (RS-MESTD-Integrated and Interdisciplinary Research (IIR or III)-45005)
- Атомски сударни процеси и фотоакустичка спектрометрија молекула и чврстих тела (RS-MESTD-Basic Research (BR or ON)-171016)
- Хемијско и структурно дизајнирање наноматеријала за примену у медицини и инжењерству ткива (RS-MESTD-Basic Research (BR or ON)-172026)
Напомена:
- 18th International Conference on Photoacoustic and Photothermal Phenomena (ICPPP), Sep 06-10, 2015, Novi Sad, Serbia
DOI: 10.1007/s10765-017-2345-0
ISSN: 0195-928X; 1572-9567
WoS: 000423734800005
Scopus: 2-s2.0-85038847524
Колекције
Институција/група
VinčaTY - JOUR AU - Nešić, Mioljub V. AU - Popović, Milan AU - Rabasović, Mihailo D. AU - Miličević, Dejan S. AU - Suljovrujić, Edin H. AU - Markushev, Dragan D. AU - Stojanović, Zoran A. PY - 2018 UR - https://vinar.vin.bg.ac.rs/handle/123456789/7199 AB - In this work, thermal diffusivity of crystalline high-density polyethylene samples of various thickness, and prepared using different procedures, was evaluated by transmission gas-microphone frequency photoacoustics. The samples composition analysis and their degree of crystallinity were determined from the wide-angle X-ray diffraction, which confirmed that high-density polyethylene samples, obtained by slow and fast cooling, were equivalent in composition but with different degrees of crystallinity. Structural analysis, performed by differential scanning calorimetry, demonstrated that all of the used samples had different levels of crystallinity, depending not only on the preparing procedure, but also on sample thickness. Therefore, in order to evaluate the samples thermal diffusivity, it was necessary to modify standard photoacoustic fitting procedures (based on the normalization of photoacoustic amplitude and phase characteristics on two thickness levels) for the interpretation of photoacoustic measurements. The calculated values of thermal diffusivity were in the range of the expected literature values. Besides that, the obtained results indicate the unexpected correlation between the values of thermal diffusivity and thermal conductivity with the degree of crystallinity of the investigated geometrically thin samples. The results indicate the necessity of additional investigation of energy transport in macromolecular systems, as well as the possible employment of the photoacoustic techniques in order to clarify its mechanism. T2 - International Journal of Thermophysics T1 - Thermal Diffusivity of High-Density Polyethylene Samples of Different Crystallinity Evaluated by Indirect Transmission Photoacoustics VL - 39 IS - 2 DO - 10.1007/s10765-017-2345-0 ER -
@article{ author = "Nešić, Mioljub V. and Popović, Milan and Rabasović, Mihailo D. and Miličević, Dejan S. and Suljovrujić, Edin H. and Markushev, Dragan D. and Stojanović, Zoran A.", year = "2018", abstract = "In this work, thermal diffusivity of crystalline high-density polyethylene samples of various thickness, and prepared using different procedures, was evaluated by transmission gas-microphone frequency photoacoustics. The samples composition analysis and their degree of crystallinity were determined from the wide-angle X-ray diffraction, which confirmed that high-density polyethylene samples, obtained by slow and fast cooling, were equivalent in composition but with different degrees of crystallinity. Structural analysis, performed by differential scanning calorimetry, demonstrated that all of the used samples had different levels of crystallinity, depending not only on the preparing procedure, but also on sample thickness. Therefore, in order to evaluate the samples thermal diffusivity, it was necessary to modify standard photoacoustic fitting procedures (based on the normalization of photoacoustic amplitude and phase characteristics on two thickness levels) for the interpretation of photoacoustic measurements. The calculated values of thermal diffusivity were in the range of the expected literature values. Besides that, the obtained results indicate the unexpected correlation between the values of thermal diffusivity and thermal conductivity with the degree of crystallinity of the investigated geometrically thin samples. The results indicate the necessity of additional investigation of energy transport in macromolecular systems, as well as the possible employment of the photoacoustic techniques in order to clarify its mechanism.", journal = "International Journal of Thermophysics", title = "Thermal Diffusivity of High-Density Polyethylene Samples of Different Crystallinity Evaluated by Indirect Transmission Photoacoustics", volume = "39", number = "2", doi = "10.1007/s10765-017-2345-0" }
Nešić, M. V., Popović, M., Rabasović, M. D., Miličević, D. S., Suljovrujić, E. H., Markushev, D. D.,& Stojanović, Z. A.. (2018). Thermal Diffusivity of High-Density Polyethylene Samples of Different Crystallinity Evaluated by Indirect Transmission Photoacoustics. in International Journal of Thermophysics, 39(2). https://doi.org/10.1007/s10765-017-2345-0
Nešić MV, Popović M, Rabasović MD, Miličević DS, Suljovrujić EH, Markushev DD, Stojanović ZA. Thermal Diffusivity of High-Density Polyethylene Samples of Different Crystallinity Evaluated by Indirect Transmission Photoacoustics. in International Journal of Thermophysics. 2018;39(2). doi:10.1007/s10765-017-2345-0 .
Nešić, Mioljub V., Popović, Milan, Rabasović, Mihailo D., Miličević, Dejan S., Suljovrujić, Edin H., Markushev, Dragan D., Stojanović, Zoran A., "Thermal Diffusivity of High-Density Polyethylene Samples of Different Crystallinity Evaluated by Indirect Transmission Photoacoustics" in International Journal of Thermophysics, 39, no. 2 (2018), https://doi.org/10.1007/s10765-017-2345-0 . .