LAB 5 - Santiago Rubio March 5, 2010 TMS Lab Section 206...

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Santiago Rubio March 5, 2010 TMS Lab Section 206 Dr. Wendy Krause Exercise 5: Observation of Fiber Structure with Crossed Polars and Red Plate 1. Abstract Ten different fibers were used to make ten longitudinal mounts in order to observe the interaction between light and fiber properties. The ten fibers were cotton, rayon, acetate, acrylic, nylon, fiberglass, polyester, polypropylene, silk, and wool. The longitudinal slides were analyzed under a polarized red plate in the microscope. The fibers refracted light and gave distinct colors when they pointed in certain directions. The most refracted light by fibers were observed in the NE-SW and NW-SE direction. The lab helped with the understanding of the interaction between light and polymer materials. 2. Introduction The purpose of this lab was to analyze the interaction between light and fibers. Under the polarized microscope we were able to view the refraction of light by different fibers which caused different colors to be seen. This helped to identify fibers through their optical properties. 3. Objectives The main objectives of this lab was to understand the interaction between light and polymer materials, and to learn how to identify fibers by analyzing their optical properties. 4. Materials 10 glass slides 10 cover slides Water Cotton Rayon Acetate Acrylic Nylon Fiberglass Polyester Polypropylene Silk Wool
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Compound microscope Probe Black Block Razor 5. Procedure 1. The materials were gathered and set up at the lab station. 2. The polarized film and red plate were slid into the microscope. 3. A small piece of cotton was sliced by a razor.
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This note was uploaded on 11/06/2010 for the course TX TMS 211 taught by Professor Hamouda during the Spring '10 term at N.C. State.

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LAB 5 - Santiago Rubio March 5, 2010 TMS Lab Section 206...

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