Polymers

Lab 12: POLYMERS OBJECTIVE: In this lab we realise 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 stem of this cross-linking. The changes in physical properties of a cross-linked polymer are also bear witness 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 come out polymers. Thermoplastic polymers changes properties when set offed and chill outed. Thermoplastics become soft when heat is use and have a smooth, hard finish when quieted. thermoset 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 thread in the course manual, CHM112 General Chemistry Laboratory Manual, LaSalle University, get hold 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 pee, go flask #2 is cloudy because the bonds of starch do not abatement nor dissolve in water. 2.)What recovered when you added the acid to the starch theme? Does it more closely resemble the glucose/ water, or the 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 merely as additional mL was added the solution resembled the glucose/ water mixture. 3.)What would carry on if a cor n plant was largely made up of glucose rathe! r than...If you want to get a full essay, set it on our website: OrderCustomPaper.com

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