List of Articles Mechanism

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  1 - The studying on mechanism, properties and application of shape memory polymers
  Hamidreza Haydari
  Shape memory polymers (SMPs) represent a highly special class of materials. As one representative of the intelligent polymeric systems, these materials gained significant interest in recent years. SMPs are stimuli-responsive polymers, which act as stimulants like light, More

  Shape memory polymers (SMPs) represent a highly special class of materials. As one representative of the intelligent polymeric systems, these materials gained significant interest in recent years. SMPs are stimuli-responsive polymers, which act as stimulants like light, temperature, PH changes, solvent changes, electrical fields or magnetic fields, and their output is strain. Also, these polymers are highly regarded as essential for fundamental research and technological innovation. The present review will provide a short overview with particular attention to structure, mechanisms and applications of SMPs, shape memory effects and, as well as the current developments and concepts for shape memory polymers. The applications of shape memory polymers can be noted in medical industries, commercial industries, S hape memory polymers (SMPs) represent a highly special class of materials. As one representative of the intelligent polymeric systems, these materials gained significant interest in recent years. SMPs are stimuli-responsive polymers, which act as stimulants like light, temperature, PH changes, solvent changes, electrical fields or magnetic fields, and their output is strain. Also, these polymers are highly regarded as essential for fundamental research and technological innovation. The present review will provide a short overview with particular attention to structure, mechanisms and applications of SMPs, shape memory effects and, as well as the current developments and concepts for shape memory polymers. The applications of shape memory polymers can be noted in medical industries, commercial industries, aerospace industries, self-healing polymers, etc. aerospace industries, self-healing polymers, etc. Manuscript profile
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  2 - Mini-Review of Self-Healing Mechanism and Formulation Optimization of Polyurea Coating
  Moein Behzadpour Mahdi Hemmatian Damghani
  Self-healing polymers are categorized as smart materials that are capable of surface protection and prevention of structural failure. Polyurethane/polyurea, as one of the representative coatings, has also attracted attention for industrial applications. Compared with po More

  Self-healing polymers are categorized as smart materials that are capable of surface protection and prevention of structural failure. Polyurethane/polyurea, as one of the representative coatings, has also attracted attention for industrial applications. Compared with polyurethane, polyurea coating, with a similar formation process, provides higher tensile strength and requires shorter curing time. The working principle of polyurea self-healing mechanisms is to fill cracks by introducing more healing components, which can polymerize and seal damage in the material. Alternatively, it can also be addressed by encouraging continuous chemical reactions, which can form bonds to close gaps between the separated faces of material due to the damage. In this paper, extrinsic and intrinsic mechanisms are reviewed to address the efficiency of the self-healing process. Furthermore, the extrinsic and intrinsic mechanisms have been compared to attain a better understanding of the advantages and limitations of each mechanism. Moreover, formulation optimization and strategic improvement to ensure self-healing within a shorter period of time with acceptable recovery of mechanical strength are also discussed. The choice and ratio of diisocyanates, as well as the choice of chain extender, are believed to have a crucial effect on the acceleration of the self-healing process and enhance self-healing efficiency during the preparation of polyurea coatings. Manuscript profile
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  3 - 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