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A Simple, Discovery-Based Laboratory Exercise: The Molecular Mass Determination of Polystyrene
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Abstract
A simple, inexpensive laboratory experiment is reported which examines the molecular mass of polystyrene. A semi-quantitative relationship between Rf and average molecular mass is developed using polystyrene standards. This discovery-based experiment analyzes common polystyrene samples. The experiment is suitable for high school and introductory college Chemistry laboratories.
Keywords (Audience):
First-Year Undergraduate / GeneralKeywords (Domain):
Organic ChemistryKeywords (Pedagogy):
Hands-On Learning / ManipulativesKeywords (Subject):
StoichiometryCiting Articles
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This article has been cited by 4 ACS Journal articles (4 most recent appear below).
Bromination, Elimination, and Polymerization: A 3-Step Sequence for the Preparation of Polystyrene from Ethylbenzene
Elizabeth M. Sanford and Heather L. HermannJournal of Chemical Education2000 77 (10), 1343Bromination, Elimination, and Polymerization: A 3-Step Sequence for the Preparation of Polystyrene from Ethylbenzene
Elizabeth M. Sanford and Heather L. HermannJournal of Chemical Education2000 77 (10), 1343An organic chemistry lab that introduces students to polymer chemistry is presented. Students complete a radical bromination of ethylbenzene, which is followed by elimination to give styrene. A radical polymerization is then completed to produce ...
Effect of Plasticizers on the Properties of Polystyrene Films
Jeffrey Csernica and Alisha BrownJournal of Chemical Education1999 76 (11), 1526Effect of Plasticizers on the Properties of Polystyrene Films
Jeffrey Csernica and Alisha BrownJournal of Chemical Education1999 76 (11), 1526An experiment is described in which polystyrene films containing various levels of plasticizers are prepared by solution-casting onto steel test panels. These films are subsequently tested for hardness using a pencil hardness technique, impact resistance ...
Spectroscopy in Sol-Gel Matrices: An Open-Ended Laboratory Experience for Upper-Level Undergraduates
Catrena Higginbotham , Charles F. Pike and Jeanette K. RiceJournal of Chemical Education1998 75 (4), 461Spectroscopy in Sol-Gel Matrices: An Open-Ended Laboratory Experience for Upper-Level Undergraduates
Catrena Higginbotham , Charles F. Pike and Jeanette K. RiceJournal of Chemical Education1998 75 (4), 461Guided-inquiry/cooperative learning laboratory experiences encourage critical thinking, problem- solving and teamwork skills in students, and have been proposed for many undergraduate laboratories, particularly general and organic. Fewer reports have ...
A New Investigative Sophomore Organic Laboratory Involving Individual Research Projects
Gregory B. KharasJournal of Chemical Education1997 74 (7), 829A New Investigative Sophomore Organic Laboratory Involving Individual Research Projects
Gregory B. KharasJournal of Chemical Education1997 74 (7), 829The problem-solving approach calls for a laboratory curriculum that provides a greater intellectual challenge and the resemblance to a research experience. A curriculum was designed which involves individual research projects for the nine laboratories of ...
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- Received: August 03, 2009
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