Lab 2 - 1 White Yarn - - 8% Brown Yarn 4% Elastic...

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Brown Yarn - 8% White Yarn - 4% 1 Elastic Properties of Polymers and Fibers Laura Hughey Georgia Institute of Technology
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2 ABSTRACT The purpose of this experiment was to determine the percent elastic recovery for two different yarns at two different elongations. Each yarn was stretched to 4% and 8% elongation using an Instron tester. The percent elastic recovery was calculated for each sample based on its elastic extension in relation to the total extension. The white yarn was found to have a higher percent elasticity compared to the brown yarn, which can be attributed to a lower molecular organization within the white yarn.
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3 MATERIALS AND EQUIPEMENT Two yarn samples were used in this lab, one brown and one white. An Instron tester with a load cell of 5 kN was used to perform the elongation on each yarn. A computer was used to collect the data. EXPERIMENTAL PROCEDURE The white yarn and brown yarn were both cut to a gage length of 25 cm. The computer program was preset with the gage length and the extension to be reached. The white yarn sample was clamped into the Instron tester. Using a traverse rate of 5 cm/min, the Instron tester
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Lab 2 - 1 White Yarn - - 8% Brown Yarn 4% Elastic...

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