Polymers

Lab 12: POLYMERS OBJECTIVE: In this lab we get word and defined the molecular structure of polymers. We analyzed the procedure of cross-linking frigid types of polymers and observe the changes in the physical properties as a issue of this cross-linking. The changes in physical properties of a cross-linked polymer are also essay as the temperature is varied. INTRODUCTION: Polymers are large molecules made up of repeating units (monomers.) These units are chemical molecules. There are ii polymerization types that we analyzed in the experiment: thermoplastic polymers and thermo sinkting polymers. Thermoplastic polymers changes properties when igniteed and chill outed. Thermoplastics become soft when heat is use and have a smooth, hard finish when cool offed. thermosetting polymers when open(a) to temperatures above their glass transition temperature (Tg) are molded into shapes and when allowed to cool will non change shape when heated once more than entirely will char or burn. PROCEDURE: We followed the procedures secern in the course manual, CHM112 General Chemistry Laboratory Manual, LaSalle University, hinge upon 2012. EXPERIMENTAL RESULTS: PART A- 1.)Compare the appearance of the settlements in flaskful #1 and #2. What can you say about the effect of having glucose by itself versus having I present in a polymer chain?

flask #1 is clear because the sugar completely dissolves in the water, go flaskful #2 is cloudy because the bonds of starch do not crumble nor dissolve in water. 2.)What recovered when you added the acid to the starch stem? Does it mor e closely resemble the glucose/ water, or th! e starch/ water mixture? When the acid was added to starch it does not dissociate until a higher volume of acid is included in the solution. initially the solution closely resembles the starch/ water mixture only when as additional mL was added the solution resembled the glucose/ water mixture. 3.)What would see if a corn plant was largely made up of glucose rather than...If you want to get a full essay, set it on our website: OrderCustomPaper.com

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