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Effect of Crumb Rubber Reinforcement on the Mechanical Properties

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Effect of Crumb Rubber Reinforcement on the Mechanical Properties of Medium Density Fiber


Recycling of scrap tires in the form of crumb rubber (CR) is one way to address the environmental concern of tire disposal. In this study, medium density fiber-board (MDF) material was fabricated using crumb rubber reinforcement. The materials were prepared by mixing polypropylene pellets and wood flour in a double helical screw mixer at 165 °C. Crumb rubber, with particle size between 1.2 to 1.4 mm, was added to the mixture while maintaining the temperature as constant. The mixture was cooled and pelletized. Subsequently, plates were prepared using a hot press. Prepared samples were characterized as per ASTM D – 1037. Compressive modulus of crumb rubber reinforced MDF showed a 200 % increase as compared to neat MDF. Flexural modulus and flexural strength of crumb rubber - MDF samples were higher than the neat MDF samples by 120 % and 75 %, respectively. Scanning electron microscopy on failed samples showed extensive tearing of crumb rubber particles which indicated that particle bridging was the dominant strengthening mechanism. The moisture content in CR reinforced MDF samples were observed to be significantly lower than neat MDF samples.


Author: Libin K Babu


Conference: SAMPE Seattle 2017


SKU/Code: SE17--0848

Pages: 12

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