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Comprehensive study of theoretical models for predicting piezoelectric properties parameters of polymeric foams. JOURNAL OF POLYMER RESEARCH 2022. [DOI: 10.1007/s10965-022-02988-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Hasanzadeh R, Azdast T, Mojaver M, Darvishi MM, Park CB. Cost-effective and reproducible technologies for fabrication of tissue engineered scaffolds: The state-of-the-art and future perspectives. POLYMER 2022. [DOI: 10.1016/j.polymer.2022.124681] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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Rostami M, Azdast T, Hasanzadeh R, Moradian M. A study on fabrication of nanocomposite polyethylene foam through extrusion foaming procedure. CELLULAR POLYMERS 2021. [DOI: 10.1177/02624893211040949] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Foaming a polymer not only turns it into a lightweight material but also gives some special properties to it. However, the most important issue is controlling the foaming process to achieve a desirable structure with high cell density and low relative density. In the present study, the extrusion foaming process of polyethylene was studied through stepwise amendments. An innovative extrusion system was designed and implemented to produce extrusion foams under different material and process conditions using N2 as blowing agent. In the first step, the final cooling condition was investigated. The air-cooling condition led to a higher cell density/lower cell size compared to the water-cooling condition although a higher relative density was obtained. In the second step, the effects of the addition of talc and the synergetic effect of talc/nanoclay at different contents were investigated in detail. The hybrid of talc/nanoclay had a noticeably improving effect on the cellular structure. In the third step, the effects of processing parameters including the die temperature and screw speed were studied on the foam properties. Finally, up to 49.4% decrease in the relative density of samples was observed, also cell densities up to 2.5 × 104 cell/cm3 and cell sizes as small as 280 µm were achieved.
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Affiliation(s)
- Milad Rostami
- Mechanical Engineering Department, Faculty of Engineering, Urmia University, Urmia, Iran
| | - Taher Azdast
- Mechanical Engineering Department, Faculty of Engineering, Urmia University, Urmia, Iran
| | - Rezgar Hasanzadeh
- Mechanical Engineering Department, Faculty of Engineering, Urmia University, Urmia, Iran
| | - Milad Moradian
- Mechanical Engineering Department, Faculty of Engineering, Urmia University, Urmia, Iran
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Moradian M, Azdast T, Doniavi A. Investigating the effect of foam properties on the attenuation of coaxial cables with foamed polyethylene dielectric. POLYM ADVAN TECHNOL 2020. [DOI: 10.1002/pat.5056] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Milad Moradian
- Mechanical Engineering Department Faculty of Engineering, Urmia University Urmia Iran
| | - Taher Azdast
- Mechanical Engineering Department Faculty of Engineering, Urmia University Urmia Iran
| | - Ali Doniavi
- Mechanical Engineering Department Faculty of Engineering, Urmia University Urmia Iran
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Azdast T, Hasanzadeh R. Increasing cell density/decreasing cell size to produce microcellular and nanocellular thermoplastic foams: A review. J CELL PLAST 2020. [DOI: 10.1177/0021955x20959301] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Nowadays, polymeric foams have attracted particular attention in scientific and industrial societies due to their unique properties, such as high strength to weight ratio, excellent thermal and sound insulation, and low cost. Researchers have shown that the extraordinary properties of polymeric foams such as superior thermal insulation, can be achieved by increasing the cell density/decreasing the cell size. In this regard, firstly, the most important foaming processes, i.e. batch, extrusion, and injection molding are studied in the present research. Then, cell nucleation stage as the most crucial phenomenon for achieving high cell density/small cell size is investigated in detail. In the next step, the most important researches in the field of polymeric foams are introduced in which the largest cell densities/smallest cell sizes have been achieved. The investigations show that the most remarkable results (highest cell densities/smallest cell sizes) belong to the batch process. Also, the use of nucleating agents, increasing the solubility of blowing agent into the polymer, and the use of nanoparticles are the most efficient solutions to achieve microcellular and nanocellular structures.
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Affiliation(s)
- Taher Azdast
- Department of Mechanical Engineering, Faculty of Engineering, Urmia University, Urmia, Iran
| | - Rezgar Hasanzadeh
- Department of Mechanical Engineering, Faculty of Engineering, Urmia University, Urmia, Iran
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Guo A, Li H, Xu J, Li J, Li F. Effect of microstructure on the properties of polystyrene microporous foaming material. E-POLYMERS 2020. [DOI: 10.1515/epoly-2020-0012] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
The performance of Polystyrene microporous foaming (PS-MCF) materials is influenced by their microstructures. Therefore, it is essential for industrializing them to investigate the relationship between their microstructure and material properties. In this study, the relationship between the microstructure, compressive property, and thermal conductivity of the PS-MCF materials was studied systematically. The results show that the ideal foaming pressure of PS-MCF materials, obtaining compression performance, is around 20 MPa. In addition, the increase of temperature causes the decrease of sample density. It effects that the compression modulus and strength increase with the decrease of foaming temperature. Because the expansion rate and cell diameter of the PS-MCF materials reduce the thickness of cell wall, they are also negatively correlated with their mechanical properties. Moreover, there is a negative linear correlation between the thermal conductivity and cell rate, whereas the cell diameter is positively correlated with the thermal conductivity.
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Affiliation(s)
- Anfu Guo
- School of Mechanical and Automobile Engineering , Liaocheng University , Liaocheng 252059 , China
| | - Hui Li
- School of Mechanical and Automobile Engineering , Liaocheng University , Liaocheng 252059 , China
| | - Jie Xu
- School of Mechanical Engineering , Shandong University , Jinan 250061 , China
| | - Jianfeng Li
- School of Mechanical Engineering , Shandong University , Jinan 250061 , China
| | - Fangyi Li
- School of Mechanical Engineering , Shandong University , Jinan 250061 , China
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Mahsa Daryadel, Doniavi A, Azdast T, Khatami M. Investigation of Rotational Molding Process of Polymeric Nanocomposites Containing Nanoclay Using a Taguchi-MCDM Couple Method. POLYMER SCIENCE SERIES A 2019. [DOI: 10.1134/s0965545x19050055] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Sajjad Mamaghani Shishavan, Azdast T, Hasanzadeh R, Moradian M. Comprehensive Investigation of Morphological Properties of ABS/Nanoclay/PMMA Polymeric Nanocomposite Foam. POLYMER SCIENCE SERIES A 2019. [DOI: 10.1134/s0965545x19030131] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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