Synthesis of Nylon-6,10: A Laboratory Experiment on Step-Growth Polymerization - Prof. Har, Lab Reports of Chemistry

Download Synthesis of Nylon-6,10: A Laboratory Experiment on Step-Growth Polymerization - Prof. Har and more Lab Reports Chemistry in PDF only on Docsity! Step-growth polymerization 10/6/08 Michaela Codella Objectives: Formation of the longest strand of nylon. To demonstrate the step-growthe polymerization by the synthesis of nylon-6,10 Reaction: Procedure: *handout given in class -the polymer rope should not be handled before the solvents and reagents are rinsed. You will need a 250 ml beaker, separatory funnel, syringe, and a can for rolling. Measure 2 ml of decanedioyl dichloride into the 250 beaker, using the syringe. dissolve the dichloride into 100 ml of dichloromethane. Place 1.1 g of crystalline 1,6-hexanediamine or 1.3 ml of a commercially available 80-95% aqueous solution, in a seperatory funnel, add 2 g of sodium bicarbonate and 50 ml of water. Shake mixture to dissolve. Arrange can that the polymer is going to be wound around near the beaker, and support the funnel containing the reagents so the lower tip is centered no more than a centimeter about the surface of the dichoromethane solution of the decanedioyl dichloride. Begin to disperse solution from the funnel into the aqueous solution so it runs slowly and gently onto the surface of the organic solution. A film of polymer will form immediately at the interface of the two solutions, with tweezers grab the center of the film and wrap the string around the drum, until all reactants are consumed. Once all the nylon has been formed, put 200 ml of 50% aqueous ethanol into a dish. Unwind the nylon rope into the wash solution and stir gently, decant the wash solution, and transfer the polymer to a filter on a Buchner funnel. Press the polymer as dry as possible and then place it in your desk to dry until the next laboratory period. When it is dry measure the length of the polymer.