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Chemistry_Project

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    Chemistry_Project Chemistry_Project Presentation Transcript

    • A development of low density polyethylene composites made with rice husk
    • Chapter1
    • 1.1 Introduction
      • At present, plastic is widely used in our modern daily lives for comfort and convenience.
    • 1.2 Objective
          • 1.2.1 To obtain the information of the new composite plastic’s properties with different ratio between polyethylene and rice husk.
          • 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.
    • 1.3 boundary of studying
      • 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.
    • 1.4 Expected result
          • 1.4.1 Obtain the best ration of combination, yielding the best quality and greatest minimization of plastic usage.
          • 1.4.2 Obtain a high quality composite plastic from low density polyethylene and rice husk which can replace the original plastic.
          • 1.4.3 Reduce the usage of polyethylene at present.
    • Chapter2
    • 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 .
    • 2.1.1Properties
      • LDPE is unreactive at room temperatures.
      • It can withstand temperatures of 80 °C continuously and 95 °C for a short time .
      • Made in translucent or opaque variations, it is quite flexible, and tough to the degree of being almost unbreakable .
      • It has more branching than HDPE , so its intermolecular forces are weaker.
      • its density is lower than HDPE .
    • 2.1.2 Physical qualities
      • Maximum Temperature : 176 ° F ( 80 ° C)
      • Minimum Temperature : −58 °F ( −50 °C )
      • Melting Point : 248 °F ( 120 °C )
      • Tensile Strength : 1700 psi ( 11.7 MPa)
      • Hardness : SD 55
      • Excellent flexibility
      • Density : 0.92 g/cm³
    • 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
    • Chapter3
    • 3.1 Materials
      • Low Density Polyethylene (LDPE)
      • Rice Husk
    • 3.2 Equipments
      • Ball Mills
      • Sieve Shaker Machine
      • Oven
      • Internal Mixer
      • Injection Molding
      • Tensile Tester
      • Impact Tester
    • 3.3 Methods
      • 3.2.1 Preparation low density polyethylene composites made with rice husk
      • 1. Crush rice husk and screen to 100 mesh size
      • 2. Dry the sieved rice husk in an oven at 80 Celcius for 5 hours.
      • 3. Compound sifted rice husk and low density polyethylene by internal mixer
      • 3.2.2 Testing
        • Tensile Tester Impact Tester