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The effects of recycled polypropylene mixing ratio on the tensile strength of polypropylene

Farah Amira, Mohd Ghazali (2013) The effects of recycled polypropylene mixing ratio on the tensile strength of polypropylene. Faculty of Manufacturing Engineering , Universiti Malaysia Pahang.

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Polypropylene blending has become an important field in polymer research and especially in the recycling area today. In this research the aim was to reduce the Polypropylene waste problem. Therefore, instead of throwing away wasted or unusable polypropylene to the environment where it may cause harm to the environment and the whole biodiversity, and thus flora and fauna and also the human kind, recycling of the Polypropylene material is done as a solution to this problem. Since polypropylene is a thermoplastic polymer, it is can be reheated and remoulded easily as it has linear molecular structures that become weak when elevated temperature is applied on it. In this research, specimens of dog bone shaped with standard size ASTM D638 are used specifically in order to carry out this research. Mechanical method of recycling this material was carried out where the specimens that are to be recycled are crushed into smaller pieces in the Crusher Machine in order to be melted easily in the injection moulding machine. Recycled polypropylene and virgin polypropylene were then mixed according to the desired mixing ratio and injection moulded into the shape of a standard size ASTM D638 in order to test its Ultimate Tensile Strength (UTS) of the mixed materials. The mixtures were injected with a range of temperature of 210 C throughout the barrel. After the specimens were produced, they undergo Ultimate Tensile Strength (UTS) test in order to determine its tensile strength at maximum temperature according to its contents of mixing ratio or recycled polypropylene and virgin polypropylene. As a result, it is concluded that the specimen with higher percentage of recycled polypropylene that exceeds the percentage of virgin polypropylene obtains high tensile stress at maximum temperature. This is due to the higher amount of recycled Polypropylene that was mixed inside the mixture where it hardens and acts to wrap the mixture and enhancing its bonding forces within the molecular structures of the material. Thus, a higher tensile strength of material was achieved.

Item Type: Undergraduates Project Papers
Additional Information: Project paper (Bachelor of Engineering in Manufacturing) -- Universiti Malaysia Pahang – 2013
Uncontrolled Keywords: Polypropylene Strength of materials
Subjects: T Technology > TP Chemical technology
Faculty/Division: Faculty of Manufacturing Engineering
Depositing User: Ms. Hazima Anuar
Date Deposited: 03 Sep 2014 01:40
Last Modified: 19 Apr 2016 00:10
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