Chemistry_Project

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Chemistry_Project

  1. 1. A development of low density polyethylene composites made with rice husk
  2. 2. Chapter1
  3. 3. 1.1 Introduction <ul><li>At present, plastic is widely used in our modern daily lives for comfort and convenience. </li></ul>
  4. 4. 1.2 Objective <ul><ul><ul><li>1.2.1 To obtain the information of the new composite plastic’s properties with different ratio between polyethylene and rice husk. </li></ul></ul></ul><ul><ul><ul><li>1.2.2 To obtain the best combination ratio between polyethylene and rice husk which yields the highest quality of the new composite plastic and greatest minimizing of plastic usage. </li></ul></ul></ul>
  5. 5. 1.3 boundary of studying <ul><li>1.3.1 Produce the composite plastic with the combination of rice husk of 10%, 20%, 30%, and 40% of low density polyethylene mass and test for its properties. </li></ul>
  6. 6. 1.4 Expected result <ul><ul><ul><li>1.4.1 Obtain the best ration of combination, yielding the best quality and greatest minimization of plastic usage. </li></ul></ul></ul><ul><ul><ul><li>1.4.2 Obtain a high quality composite plastic from low density polyethylene and rice husk which can replace the original plastic. </li></ul></ul></ul><ul><ul><ul><li>1.4.3 Reduce the usage of polyethylene at present. </li></ul></ul></ul>
  7. 7. Chapter2
  8. 8. 2.1 Low density polyethylene Low - density poly ethylene (LDPE) is a thermoplastic made from o il. It was the first grade of polyethylene, produced in 1933 by Imperial Chemical Industries ( ICI ) using a high pressure process via free radical polymerisation. Its manufacture employs the same method today .
  9. 9. 2.1.1Properties <ul><li>LDPE is unreactive at room temperatures. </li></ul><ul><li>It can withstand temperatures of 80 °C continuously and 95 °C for a short time . </li></ul><ul><li>Made in translucent or opaque variations, it is quite flexible, and tough to the degree of being almost unbreakable . </li></ul><ul><li>It has more branching than HDPE , so its intermolecular forces are weaker. </li></ul><ul><li>its density is lower than HDPE . </li></ul>
  10. 10. 2.1.2 Physical qualities <ul><li>Maximum Temperature : 176 ° F ( 80 ° C) </li></ul><ul><li>Minimum Temperature : −58 °F ( −50 °C ) </li></ul><ul><li>Melting Point : 248 °F ( 120 °C ) </li></ul><ul><li>Tensile Strength : 1700 psi ( 11.7 MPa) </li></ul><ul><li>Hardness : SD 55 </li></ul><ul><li>Excellent flexibility </li></ul><ul><li>Density : 0.92 g/cm³ </li></ul>
  11. 11. Rice husk is one of the abundant natural resources in Thailand . It has been used as fuel or raw material for silica, but has not been sufficiently utilized so far . Rice husk roughly contains 35% cellulose, 35% hemicellulose, 20% lignin and 10% ash (94% silica), by dry weight basis 2.2 Rice husk
  12. 12. Chapter3
  13. 13. 3.1 Materials <ul><li>Low Density Polyethylene (LDPE) </li></ul><ul><li>Rice Husk </li></ul>
  14. 14. 3.2 Equipments <ul><li>Ball Mills </li></ul>
  15. 15. <ul><li>Sieve Shaker Machine </li></ul>
  16. 16. <ul><li>Oven </li></ul>
  17. 17. <ul><li>Internal Mixer </li></ul>
  18. 18. <ul><li>Injection Molding </li></ul>
  19. 19. <ul><li>Tensile Tester </li></ul>
  20. 20. <ul><li>Impact Tester </li></ul>
  21. 21. 3.3 Methods <ul><li>3.2.1 Preparation low density polyethylene composites made with rice husk </li></ul><ul><li>1. Crush rice husk and screen to 100 mesh size </li></ul><ul><li>2. Dry the sieved rice husk in an oven at 80 Celcius for 5 hours. </li></ul><ul><li>3. Compound sifted rice husk and low density polyethylene by internal mixer </li></ul>
  22. 22. <ul><li>3.2.2 Testing </li></ul><ul><ul><li>Tensile Tester Impact Tester </li></ul></ul>

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