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Preparation and Structure­properties Relationship in Rubber Toughened PA6 Reinforced with Nanodiamond

Roosta, Reza | 2018

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 50597 (06)
  4. University: Sharif University of Technology
  5. Department: Chemical and Petroleum Engineering
  6. Advisor(s): Shojaei, Akbar
  7. Abstract:
  8. Polyamide6 has many engineering applications due to its physical, mechanical and processability properties. However, its low impact resistance limits the use of polyamide6. One of the common ways to overcome this problem and extend the range of polyamide6 application is its elasticity with elastomeric materials, which reduces the strength and modulus (tensile and flexure) in comparision with neat polyamide6. To overcome this limitation, various reinforcements, often fiber or particle-shaped, are used. Today, with the development of nanoparticles, this effort is being made to use nanoparticles, especially carbon nanoparticles with unique properties. Recent research has shown that the addition of diamond nanoparticles to polyamide6, while improving mechanical properties (tensile properties), also increases its impact resistance. In this project, for the first time role of diamond nanoparticles and surface modification by diamine is investigated. It will be considered in improving the mechanical and tribilogical properties of the toughened polyamide. To enhance the adhesion of the diamond nanoparticle with the polyamide6 matrix, the nanoparticle surface is modified by appropriate chemical groups. The rubber used in this study is EPR-g-MA and a multi-stage melt mixing method will be used to prepare samples. The addition of EDA-modified diamond nanoparticles to polyamide6 / rubber / nano-alumina nanocomposites initially reduces mechanical properties to a certain content and increases mechanical properties by increasing the amount of nanoscale nanomaterials (in spite of the elongation at fracture, which is always decreased). Impact strength decreases with increasing nano-alumina content, except in 0.2% of modified nanodiamond, which shows a strong increase in impact resistance. The wear properties and friction coefficient have improved with increasing nanodiamond content or nanodiamond surface modification
  9. Keywords:
  10. Polyamide 6 ; Nanodiamond ; Toughness ; Diamond Nanoparticle ; EP Rubber (EPR) ; Toughened Nanocomposite ; Rubber Toughening

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