Cart
Article
Study of Polymer Glasses by Modulated Differential Scanning Calorimetry in the Undergraduate Physical Chemistry Laboratory
Hi-Res PDFPurchase the full-text
- PDF/HTML,
figures/images,
references and tables,
(where available)
Abstract
Recent technological advances in thermal analysis present educational opportunities. In particular, modulated differential scanning calorimetry (MDSC) can be used to contrast reversing and nonreversing processes in practical laboratory experiments. The introduction of these concepts elucidates the relationship between experimental timescales and reversibility. The latter is a key concept of undergraduate thermodynamics theory that deserves reinforcement. In this paper, the theory and application of MDSC to problems of current interest is outlined with special emphasis on the contrast between crystallization and vitrification. Glass formation deserves greater emphasis in the undergraduate curriculum. Glass transitions are increasingly recognized as an important aspect of materials properties and dynamics in fields ranging from polymer science to protein folding. The example chosen for study is a comparison of polyethylene glycol and atactic polypropylene glycol. The experiment is easily performed in a typical three-hour lab session.
Keywords (Audience):
Upper-Division UndergraduateKeywords (Domain):
Laboratory InstructionKeywords (Pedagogy):
Hands-On Learning / ManipulativesKeywords (Subject):
Instrumental MethodsCiting Articles
Citation data is made available by participants in CrossRef's Cited-by Linking service. For a more comprehensive list of citations to this article, users are encouraged to perform a search in SciFinder.
This article has been cited by 7 ACS Journal articles (5 most recent appear below).
An Undergraduate Experiment Using Differential Scanning Calorimetry: A Study of the Thermal Properties of a Binary Eutectic Alloy of Tin and Lead
Ronald P. D’Amelia, Daniel Clark, and William NirodeJournal of Chemical Education2011 Article ASAPAn Undergraduate Experiment Using Differential Scanning Calorimetry: A Study of the Thermal Properties of a Binary Eutectic Alloy of Tin and Lead
Ronald P. D’Amelia, Daniel Clark, and William NirodeJournal of Chemical Education2011 Article ASAPAn alloy is an intimate association of two or more metals, with or without a definite composition, which has metallic properties. Heterogeneous alloys, such as tin–lead (Sn/Pb) solders, consist of a mixture of crystalline phases with different ...
A Simple Rate Law Experiment Using a Custom-Built Isothermal Heat Conduction Calorimeter
Lars Wadsö , Xi LiJournal of Chemical Education2008 85 (1), 112A Simple Rate Law Experiment Using a Custom-Built Isothermal Heat Conduction Calorimeter
Lars Wadsö , Xi LiJournal of Chemical Education2008 85 (1), 112Most processes (whether physical, chemical, or biological) produce or consume heat: measuring thermal power (the heat production rate) is therefore a typical method of studying processes. Here we describe the design of a simple isothermal heat conduction ...
Introduction of Differential Scanning Calorimetry in a General Chemistry Laboratory Course: Determination of Heat Capacity of Metals and Demonstration of the Law of Dulong and Petit
Ronald P. D'Amelia , Vincent Stracuzzi and William F. NirodeJournal of Chemical Education2008 85 (1), 109Introduction of Differential Scanning Calorimetry in a General Chemistry Laboratory Course: Determination of Heat Capacity of Metals and Demonstration of the Law of Dulong and Petit
Ronald P. D'Amelia , Vincent Stracuzzi and William F. NirodeJournal of Chemical Education2008 85 (1), 109Today's general chemistry students are introduced to many of the principles and concepts of thermodynamics. In first-year general chemistry undergraduate courses, thermodynamic properties such as heat capacity are frequently discussed. Classical ...
Modern Developments in the Physical Chemistry Laboratory
Samuel A. Abrash2007 973 (), 115-151Modern Developments in the Physical Chemistry Laboratory
Samuel A. Abrash2007 973 (), 115-151Developments in the physical chemistry laboratory since the publication of the germinal text by Schwenz and Moore (1) are categorized and reviewed. The categories examined include modern instrumentation, current topics in chemistry, integrated ...
Introduction of Differential Scanning Calorimetry in a General Chemistry Laboratory Course: Determination of Thermal Properties of Organic Hydrocarbons
Ronald D'Amelia , Thomas Franks and William F. NirodeJournal of Chemical Education2007 84 (3), 453Introduction of Differential Scanning Calorimetry in a General Chemistry Laboratory Course: Determination of Thermal Properties of Organic Hydrocarbons
Ronald D'Amelia , Thomas Franks and William F. NirodeJournal of Chemical Education2007 84 (3), 453In first-year general chemistry undergraduate courses, thermodynamics and thermal properties such as melting points and changes in enthalpy (ΔH) and entropy (ΔS) of phase changes are frequently discussed. Typically, classical calorimetric methods of ...
Full Text HTMLTools
-
Add to Favorites
-
Download Citation
-
Email a Colleague -
Permalink
Order Reprints
Rights & Permissions
Citation Alerts
History
- Received: August 03, 2009
ACS
Network
Facebook
Tweet This
CiteULike
Newsvine
Digg This
Delicious
C−(fc)n−C
