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Michael A. Everest; Abigail J. Toves; Melissa S. Reeves – Journal of Chemical Education, 2023
We have developed a guided-inquiry laboratory exercise in which students perform viscosity measurements to infer the structure of poly(vinyl alcohol) (PVA) in aqueous solution. The activity combines both experiments and modeling. In the experimental portion of the exercise, students measure the viscosity of several solutions of PVA with differing…
Descriptors: Molecular Structure, Chemistry, Science Experiments, Inquiry
Michelle Garcia; Frances A. O'Leary; Daniel J. O'Leary – Journal of Chemical Education, 2023
This report outlines an approach for preparing 5-color 3D printed plastic models of molecular orbitals and electron density surfaces using a hobby-grade 3D printer. Instructions are provided for preparing 3D orbital and electron density surface (EDS) models using solid or mesh representations in ground state and transition state structures. We…
Descriptors: Science Education, Hands on Science, Computer Peripherals, Printing
Lisensky, George; Dauzvardis, Fabian; Luo, Jiaqi; Horger, Jacob; Koenig, Emma – Journal of Chemical Education, 2020
Polymers and nanochemistry are important facets of chemistry. In this experiment, students synthesize monodispersed poly(methyl methacrylate) nanospheres from the addition or chain polymerization of a rapidly stirred aqueous mini-emulsion of methyl methacrylate. The 2,2'-azobis(2-methylpropionamidine) dihydrochloride serves as a heat activated,…
Descriptors: Science Instruction, Chemistry, Scientific Concepts, Molecular Structure
Qianfu Luo; Chenyu Shi; Zhaoxia Wang; Meng Chen; Da-Hui Qu – Journal of Chemical Education, 2022
Given the importance of self-healing polymers for chemistry education, herein, we introduce our latest research results in self-healing materials based on thioctic acid into undergraduate chemistry laboratory. In this experiment, a natural small molecule, thioctic acid (TA), and a few other commercially-available reagents have been used to make a…
Descriptors: Chemistry, Plastics, Undergraduate Study, College Science
Shulman, Joel I. – Journal of Chemical Education, 2017
Many of the principles of organic polymer chemistry are direct extensions of the information contained in the standard introductory organic chemistry course. Often, however, the discussion of macromolecules is relegated to a chapter at the end of the organic chemistry text and is covered briefly, if at all. Connecting the organic-chemical…
Descriptors: Organic Chemistry, Introductory Courses, Science Instruction, College Science
Harrell, Mary L.; Bergbreiter, David E. – Journal of Chemical Education, 2017
The use of [superscript 1]H NMR spectroscopy to analyze the number-average molecular weight of a methoxy poly(ethylene glycol) (MPEG) and an acetate derivative of this MPEG is described. These analyses illustrate NMR principles associated with the chemical shift differences of protons in different environments, NMR integration, and the effect of…
Descriptors: Spectroscopy, Organic Chemistry, Scientific Concepts, Concept Teaching
Wnek, Gary E. – Journal of Chemical Education, 2017
Small organic molecules offer a rich opportunity to discuss the interplay of chemical structure with properties such as the melting point and phenomena such as glass formation and can form the basis of fundamental considerations of structure-property relationships in macromolecules. Of particular importance are thermal transitions, specifically…
Descriptors: Organic Chemistry, Molecular Structure, Teaching Methods, Plastics
Tsarevsky, Nicolay V.; Woodruf, Shannon R.; Wisian-Neilson, Patty J. – Journal of Chemical Education, 2016
A two-session experiment is designed to introduce undergraduate students to concepts in catalysis, transition metal complexes, polymer synthesis, and postpolymerization modifications. In the first session, students synthesize poly(glycidyl methacrylate) via low-catalyst-concentration atom transfer radical polymerization (ATRP). The…
Descriptors: Undergraduate Students, Science Education, Chemistry, Science Laboratories
Dickson-Karn, Nicole M. – Journal of Chemical Education, 2017
A multi-instrument approach has been applied to the efficient identification of polymers in an upper-division undergraduate instrumental analysis laboratory course. Attenuated total reflectance Fourier transform infrared spectroscopy (ATR-FTIR) is used in conjunction with differential scanning calorimetry (DSC) to identify 18 polymer samples and…
Descriptors: Laboratory Experiments, Undergraduate Study, Molecular Structure, Qualitative Research
Ting, Jeffrey M.; Ricarte, Ralm G.; Schneiderman, Deborah K.; Saba, Stacey A.; Jiang, Yaming; Hillmyer, Marc A.; Bates, Frank S.; Reineke, Theresa M.; Macosko, Christopher W.; Lodge, Timothy P. – Journal of Chemical Education, 2017
We present a collection of hands-on experiments that collectively teach precollege students fundamental concepts of polymer synthesis and characterization. These interactive experiments are performed annually as part of an all-day outreach event for high school students that can inform the development of ongoing polymer education efforts in a…
Descriptors: Science Instruction, Chemistry, Plastics, Science Experiments
Knutson, Cassandra M.; Schneiderman, Deborah K.; Yu, Ming; Javner, Cassidy H.; Distefano, Mark D.; Wissinger, Jane E. – Journal of Chemical Education, 2017
With new K-12 national science standards emerging, there is an increased need for experiments that integrate engineering into the context of society. Here we describe a chemistry experiment that combines science and engineering principles while introducing basic polymer and green chemistry concepts. Using medical sutures as a platform for…
Descriptors: Plastics, Science Instruction, Teaching Methods, Standards
Chan, Julian M. W.; Zhang, Xiangyi; Brennan, Megan K.; Sardon, Haritz; Engler, Amanda C.; Fox, Courtney H.; Frank, Curtis W.; Waymouth, Robert M.; Hedrick, James L. – Journal of Chemical Education, 2015
In this laboratory experiment, students work in pairs to synthesize a simple aliphatic polycarbonate via ring-opening polymerization of trimethylene carbonate using 1,8-diazabicyclo[5.4.0]undec-7-ene and thiourea as organocatalysts. Following polymer isolation, students cool the material in a dry ice/acetone bath to observe its glass-transition…
Descriptors: Science Instruction, Science Laboratories, Laboratory Experiments, Science Experiments
Knoerzer, Timm A.; Balaich, Gary J.; Miller, Hannah A.; Iacono, Scott T. – Journal of Chemical Education, 2014
Poly(phenylene vinylene) (PPV) represents an important class of conjugated, conducting polymers that have been readily exploited in the preparation of organic electronic materials. In this experiment, students prepare a PPV polymer via a facile multistep synthetic sequence with robust spectroscopic evaluation of synthetic intermediates and the…
Descriptors: Science Instruction, Science Laboratories, Plastics, Scientific Concepts
Horikoshi, Ryo; Kobayashi, Yoji; Kageyama, Hiroshi – Journal of Chemical Education, 2013
Catalysis with transition-metal complexes is a part of the inorganic chemistry curriculum and a challenging topic for upper-level undergraduate and graduate students. A hands-on teaching aid has been developed for use during conventional lectures to help students understand these catalytic reactions. A unique method of illustrating the…
Descriptors: Science Instruction, Inorganic Chemistry, Hands on Science, Scientific Concepts
Chen, Yueh-Huey; He, Yu-Chi; Yaung, Jing-Fun – Journal of Chemical Education, 2014
Hydrogels of the so-called smart polymers or environment-sensitive polymers are important modern biomaterials. Herein, we describe a hands-on activity to explore the pH-responsive characteristics of hydrogels using a commercially available ionic soft contact lens that is a hydrogel of poly(2-hydroxyethyl methacrylate-"co"-methacrylic…
Descriptors: Science Instruction, Chemistry, Hands on Science, Scientific Concepts
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