List of Articles سلولز

• Open Access Article
  • Abstract Page
  • Full-Text
  
  1 - The Origin and Application of Flame Retardant Biobased Polymers in Cellulosic Industry
  mehrnoosh tavakoli ali ghasemian
  Nowadays, In order to reduce environmental footprint, polymer industry has started to develop new materials based on natural resources. Two kinds of biobased polymers can be developed. The first one corresponds to macromolecular structures existing in nature as cellulos More

  Nowadays, In order to reduce environmental footprint, polymer industry has started to develop new materials based on natural resources. Two kinds of biobased polymers can be developed. The first one corresponds to macromolecular structures existing in nature as cellulose, lignin, starch, alginate and so-on that most of them are probably the ones that derived from well-established cellulosic industries. Nevertheless, the thermal stability of these rich in oxygen structures are limited, they release relatively little heat during burning and are often able to char. Other biobased polymers are made up of molecules synthesized from natural resources. Not only polymers but also all additives used to modify their properties can be biobased to meet sustainable development. Intensive research is devoted to develop flame retardant biobased polymers from various raw resources. These flame retardant biobased polymers can be used directly as they are, alone or as a component of a more complex system. This is especially true when the molecules are phosphorus-rich as DNA or phytic acid or charring as lignin. All the efforts reviewed in this paper, show that a major objective is to develop 100 % biobased materials suitable for applications requiring high flame retardancy level. Different biomolecules from the cellulosic industry are also the most promising in flame retardancy. Manuscript profile
• Open Access Article
  • Abstract Page
  • Full-Text
  
  2 - -
  Zahra Khoubi-Arani
  20.1001.1.25383345.1400.6.21.1.9
  -

  - Manuscript profile
• Open Access Article
  • Abstract Page
  • Full-Text
  
  3 - -
  mehrnoush mohammadi
  -

  - Manuscript profile
• Open Access Article
  • Abstract Page
  • Full-Text
  
  4 - A review of the use of rheology in the industry of producing propellants based on nitrocellulose polymer
  Mahmoud Heydari
  One of the main applications of nitrocellulose polymer is producing propellants. The propellant production process includes mixing nitrocellulose with solvents and other additives and converting it from a fibrous to a non-fibrous state during gelatinization and physical More

  One of the main applications of nitrocellulose polymer is producing propellants. The propellant production process includes mixing nitrocellulose with solvents and other additives and converting it from a fibrous to a non-fibrous state during gelatinization and physical gel formation. This gel is subsequently subjected to shaping processes using ram or screw extrusion. One of the main problems in producing propellant based on nitrocellulose is the lack of uniformity and product quality control. Despite the high capability of rheology knowledge as a powerful tool for measuring the quality control of raw materials and the production process of propellant based on nitrocellulose, this knowledge has received less attention from researchers and manufacturers in this field. This article reviewed the use of rheology in different parts of the production of nitrocellulose-based propellants, from the quality control of the incoming raw materials to the final mixing and extrusion. At first, the rheological behavior of nitrocellulose mixtures was discussed. Next, the effect of nitrocellulose polymer microstructure on the rheological behavior of its solution was discussed. Phenomena affecting the measurement of the rheological behavior of the mixture, such as wall slippage, were among the other cases investigated. Finally, a review of the quality control methods of nitrocellulose-based propellant products using appropriate material functions and production process modification was discussed. Manuscript profile