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Direct linkKnutson, Cassandra M.; Hilker, Abby P.; Tolstyka, Zachary P.; Anderson, Constance B.; Wilbon, Perry A.; Mathers, Robert T.; Wentzel, Michael T.; Perkins, Angela L.; Wissinger, Jane E. – Journal of Chemical Education, 2019
A versatile experiment is described for the high school and college laboratory setting based on the synthesis of biobased polymers prepared from inexpensive, renewable, and nonhazardous chemicals. Combinations of readily available citric acid, glycerol, and tapioca root starch are used to prepare three polymeric materials with different observable…
Descriptors: Secondary School Science, College Science, Chemistry, Science Experiments
Singfield, Kathy L.; Chisholm, Roderick A.; King, Thomas L. – Journal of Chemical Education, 2012
A laboratory experiment currently used in an undergraduate physical chemistry lab to investigate the rates of crystallization of a polymer is described. Specifically, the radial growth rates of typical disc-shaped crystals, called spherulites, growing between microscope glass slides are measured and the data are treated according to polymer…
Descriptors: Chemistry, Plastics, Laboratory Experiments, Science Instruction
Weizman, Haim; Nielsen, Christian; Weizman, Or S.; Nemat-Nasser, Sia – Journal of Chemical Education, 2011
This laboratory experiment exposes students to the chemistry of self-healing polymers based on a Diels-Alder reaction. Students accomplish a multistep synthesis of a monomer building block and then polymerize it to form a cross-linked polymer. The healing capability of the polymer is verified by differential scanning calorimetry (DSC) experiments.…
Descriptors: Plastics, Organic Chemistry, Laboratory Experiments, College Science
Pety, Stephen J.; Lu, Hang; Thio, Yonathan S. – Chemical Engineering Education, 2011
This paper describes a student laboratory experiment to determine the molecular weight of a polymer sample by measuring the viscosity of dilute polymer solutions in a PDMS microfluidic viscometer. Sample data are given for aqueous solutions of poly(ethylene oxide) (PEO). A demonstration of shear thinning behavior using the microviscometer is…
Descriptors: Plastics, Undergraduate Students, Chemistry, Laboratory Experiments
Kulkarni, Atul; Kim, Youngjin; Kim, Taesung – Physics Education, 2009
This article reports for the first time the use of a plastic optical fibre (POF) cantilever beam to measure the density of a liquid. The sensor is based on the Archimedes buoyancy principle. The sensor consists of a POF bonded on the surface of a metal beam in the form of a cantilever configuration, and at the free end of the beam a displacer is…
Descriptors: Plastics, Laboratory Experiments, Measurement Techniques, Scientific Principles
D'Amico, Teresa; Donahue, Craig J.; Rais, Elizabeth A. – Journal of Chemical Education, 2008
This lab experiment illustrates the use of differential scanning calorimetry (DSC) and thermal gravimetric analysis (TGA) in the measurement of polymer properties. A total of seven exercises are described. These are dry exercises: students interpret previously recorded scans. They do not perform the experiments. DSC was used to determine the…
Descriptors: Plastics, Chemistry, Science Experiments, Laboratory Experiments
