Iran Polymer Technology, Research and Development: 33 (1)

Open Access Article

1 - Porous polymers and recent developments in organic covalent frameworks applications in magnetic solid phase extraction method for use in food analysis
Parastoo Fooladi Milad Ghani

Magnetic Covalent Organic Frameworks are one of the adsorbents used in Magnetic Solid-Phase Extraction, which are due to easy synthesis, compatibility with the environment, high porosity, easy changes of functional groups and structures. pre-engineered, have been widely More

Magnetic Covalent Organic Frameworks are one of the adsorbents used in Magnetic Solid-Phase Extraction, which are due to easy synthesis, compatibility with the environment, high porosity, easy changes of functional groups and structures. pre-engineered, have been widely used in food extraction and analysis. In this paper, the polymer-based MSPE method of MCOF will be described. Also, the latest design and fabrication methods of various MCOFs will be briefly explained. is given. The development and application of MCOFs combined with MSPE technology shows great potential in food safety monitoring. MCOFs are due to their unique structural and chemical properties such as strong magnetic properties, high specific surface area, functional groups, permanent porosity and Excellent chemical stability, excellent magnetic adsorbent are considered. Functional groups of MCOFs with monomers or polymers that contain different functional groups are a scientific approach to develop new MCOFs that can effectively adsorb contaminants in food. Effectively texture effect. removes, and improves extraction efficiency. This review describes the recent progress in the application of MCOFs in the preconcentration and analysis of pesticides, pharmaceuticals, polymer additives, pyrolysis products and other types of food contaminants. Finally, it examines future challenges and possible solutions in the analysis of the food samples. Manuscript profile

Open Access Article

2 - The effect of additives and masterbatch to improve the properties of recycled polyolefins
Hamidreza Haydari marziyeh hosseini

Although the recycling of polymer products is beneficial for the environment and economy, the main goal is to achieve the efficiency of raw (intact) polymers in recycled polymers. The best type of recycling to have maximum energy efficiency and minimum environmental con More

Although the recycling of polymer products is beneficial for the environment and economy, the main goal is to achieve the efficiency of raw (intact) polymers in recycled polymers. The best type of recycling to have maximum energy efficiency and minimum environmental consequences is mechanical recycling. However, there are a number of differences between virgin and recycled polymers. Due to the structural changes and the presence of impurities in the polymer, it is difficult to achieve a quality recycling. Whether the recycled polymer is suitable for obtaining new applications or not is measured by mechanical tests (such as tensile test, impact test), physical tests (such as hydraulic stability, surface roughness) and operational tests (extrusion and molding) under standard conditions. When these tests are performed, most recycled polymers do not meet the requirements required for various applications, unless we use additives that improve their properties. These additives may include coupling agents, impact improvers, metal deactivators, melt flow regulators, antioxidants, masterbatches, etc., and each is used in some way to improve specific properties of the polymers. Although the recycling of polymer products is beneficial for the environment and economy, the main goal is to achieve the efficiency of raw (intact) polymers in recycled polymers. Manuscript profile

Open Access Article

3 - Studying structural properties of polyethylene waxes with infrared spectroscopy
Mina Alizadehaghdam

Polyethylene waxes are ethylene oligomers with unique properties, high crystallinity, linearity and low solubility in the solvents which provides a variety of applications in different industries such as electrotechnique, rubber, textile, fertilizer production, etc. Inf More

Polyethylene waxes are ethylene oligomers with unique properties, high crystallinity, linearity and low solubility in the solvents which provides a variety of applications in different industries such as electrotechnique, rubber, textile, fertilizer production, etc. Infrared spectroscopy (FTIR) is a simple and common analysis to examine the chemical and physical properties of polyethylene such as structure identification, chemical composition and crystallinity evaluation. Physical properties of a polyethylene wax largely depends on its branching degree. Absorption at the wavelength 1378 cm-1 associated with methyl groups symmetric deformation is used for determining the number of branches. Rocking vibration of methyl and methylene groups in the wavelength ranges of 800-1200 cm-1 and 720-770 cm-1 respectively are applied for identification of the branch type. Absorption of vinyl, trans vinylene and vinylidene unsaturation and carbonyl groups introduced into the structure by wax oxidation, were investigated. Absorption intensity was related to the number of absorbing species by molar absorption parameter or absorption coefficient based on the Beer-Lambert law. Some experimental relations were also introduced based on nuclear magnetic resonance spectroscopy. Deconvolution of the double absorption in the range 720-730 cm-1, associated with rocking vibration of methylene groups, to the crystalline and amorphous bands led to the crystallinity estimation. Manuscript profile

Open Access Article

4 - A review of factors influencing the rheological behavior of highly filled composite
Ali Riazati

The highly filled composite consists of two polymer matrix components and different fillers with a weight fraction of more than 30% and are widely used in defense systems and aerospace engines. Each of the metal powders can affect the rheological behavior of highly fill More

The highly filled composite consists of two polymer matrix components and different fillers with a weight fraction of more than 30% and are widely used in defense systems and aerospace engines. Each of the metal powders can affect the rheological behavior of highly filled composites according to their properties, type of granulation, type of particle size, and morphology. The investigation of three types of metal powders, aluminum, magnesium and boron, which are the most used in highly filled composites, has been done in this study. The results of the investigation of the rheological behavior showed that with the increase in the size of solid particles, the content of metal powders, as well as the cross-linking factor, the viscosity and yield stress of the slurry of composite materials increases and causes the flow properties of the slurry to deteriorate and its service life to be shortened. become wet The increase in viscosity is due to smaller solid particles and the increase in molecular weight and the formation of transverse connections in the structure of the prepolymer. The viscosity of the slurry of composite materials decreases with the increase of the shearing speed and shows non-Newtonian pseudo-plastic behavior, and its value depends on the speed and time of the applied shearing force. Combining boron metal powder with magnesium or aluminum powder can greatly improve the rheological behavior of the highly filled composite. Manuscript profile

Open Access Article

5 - Platform for manufacturing and intelligent production of polymers: genome engineering of polymer materials
Zeinab Sadat Hosseini

High-performance polymer materials are the foundation of high-level technology development and advanced manufacturing. Recently, polymeric material genome engineering (PMGE) has been proposed as a basic platform for the intelligent production of polymeric materials. Po More

High-performance polymer materials are the foundation of high-level technology development and advanced manufacturing. Recently, polymeric material genome engineering (PMGE) has been proposed as a basic platform for the intelligent production of polymeric materials. Polymeric Material Genome Engineering (PMGE) is an emerging field that combines the principles of the Materials Genome Initiative with polymer science to accelerate the discovery and development of new polymeric materials. The concept of PMGE is to create a comprehensive database of polymer properties obtained from both computational and experimental methods. This database can then be used to train machine learning models that can predict the properties of new polymers. However, the development of PMGE is still in its infancy and many issues remain to be addressed. Overall, PMGE represents a significant step towards the intelligent manufacturing of polymeric materials, with the potential to revolutionize the field by enabling faster and more efficient development of new materials. In this review are presented the fundamental concepts of PMGE and a summary of recent research and achievements, then are investigated the most important challenges and the future prospects. Specifically, this study focuses on the property prediction approaches, including of the proxy approach and the machine learning, and discusses the potential applications of PMGE, i.e. the advanced composites, the polymer materials used in the communication systems, and electrical integrated circuit manufacturing. Manuscript profile

Open Access Article

6 - A Review of Thermal Actuation Methods for Thermally-Activated Twisted and Coiled Polymer Actuators
Mohammadamir Bakhshi Ali Moazemi Goudarzi Fattaneh Morshedsolouk

Recently, a new type of artificial muscle called thermally activated twisted and coiled polymer actuators (TCPAs) has garnered significant attention. These actuators are primarily made from fishing lines or sewing thread, and when actuated by heat, they can contract alo More

Recently, a new type of artificial muscle called thermally activated twisted and coiled polymer actuators (TCPAs) has garnered significant attention. These actuators are primarily made from fishing lines or sewing thread, and when actuated by heat, they can contract along their length to produce linear displacement. The low production cost, silent operation, high power-to-weight ratio, and the ability to generate significant displacement in response to thermal stimuli are among the advantages that have made these actuators more appealing compared to other conventional actuators. They are thus emerging as a suitable option for various applications, such as robotics, smart textiles, energy harvesting systems, and more. These actuators (TCPAs) operate by leveraging the expansion and contraction properties of polymer fibers, which are initially twisted by an electric motor and then coiled into a spring-like structure. This construction method enhances the strength and efficiency of the TCPAs. Additionally, these actuators can maintain their performance in diverse environments, including underwater and high-temperature settings. This review explores the fabrication methods, underlying principles, and thermal actuating techniques of these actuators. It also discusses their innovative and emerging applications. Furthermore, the study addresses the challenges in exploiting this technology and proposes possible solutions to optimize their performance. Manuscript profile

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