Actions for Glass Transition Measurements by DSC

Email RIS file
Bookmark
Report an Issue

Glass Transition Measurements by DSC / HE. Bair

Conference Author
Assignment of the Glass Transition (1993 : Atlanta, GA)
Physical Description
1 online resource (25 pages) : illustrations, figures, tables
Additional Creators
Bair, HE., American Society for Testing and Materials, and ASTM International
Access Online

Availability

I Want It
I Want It

Finding items...

Restrictions on Access
License restrictions may limit access.
Subscription required for access to full text.
Contents
Machine generated contents note: Audience Discussion I: Dealing with Condensed Moisture / R. P. Tye -- Audience Discussion II: Measurement of Temperatures and the Precision of the Assigned Glass Transition Temperature / R. P. Tye -- The Nature of the Glass Transition and Its Determination by Thermal Analysis / B. Wunderlich -- Phenomenology of the Structural Relaxation Process and the Glass Transition / C. T. Moynihan -- Glass Transition Measurements by DSC / H. E. Bair -- Assignment of Glass Transition Temperatures Using Thermomechanical Analysis / C. M. Earnest -- The Application of Dynamic Mechanical Methods to T[subscript g] Determination in Polymers: An Overview / R. P. Chartoff / P. T. Weissman / A. Sircar -- Assignment of the Glass Transition Temperature Using Dielectric Analysis: A Review / S. A. Bidstrup / D. R. Day -- Calorimetric Studies on Glasses and Glass Transition Phenomena / S.-S. Chang -- Analysis of DSC Thermal Curves for Assigning a Characteristic Glass Transition Temperature, Dependent on Either the Type or Thermal History of the Polymer / J. R. Saffell -- Sensing Glass Transitions in Thin Polymer Films on Acoustic Wave Microsensors / J. W. Grate -- Plasticization of Polystyrene by High Pressure Gases: A Calorimetric Study / Y. P. Handa / M. L. O'Neill -- Glass Transition in Polymers: Comparison of Results from DSC, TMA, and TOA Measurements / G. Bayer / H. G. Wiedemann / G. Widmann -- Glass Transition and Heat Capacities of Inorganic Glasses: Diminishing Change in the Heat Capacity at [actual symbol not reproducible] Glasses / S. W. Martin / J. Cho / J. Kincs / D. Bloyer -- Glass Transition of a Liquid Crystal Polymer / A. T. Riga / B. Cassel -- Glass Transition(s) of Ionomers / R. A. Weiss -- Measurement of the Glass Transition Temperature of Elastomer Systems / R. P. Chartoff / A. K. Sircar -- Assigning the Glass Transition Temperature in Oriented Poly(ethylene terephthalate) / M. J. Moscato / R. J. Seyler -- The Glass Transition Temperature of Glassy Polymers Using Dynamic Mechanical Analysis / E. L. Rodriguez -- Measuring the Glass Transition Temperature of EPDM Roofing Materials: Comparison of DMA, TMA, and DSC Techniques / J. Penn / R. M. Paroli -- Evaluation of Upper Use Temperature of Toughened Epoxy Composites / R. C. Cochran / M. F. DiBerardino / D. G. Wong / J. L. Jankowsky -- Glass Transition Measurements on Automotive Coatings by DSC, DMA, and TMA / M. K. Gupta -- Closing Discussion: Highlights and the Challenges that Remain / R. J. Seyler.
Summary
This is a review of glass transition temperature (Tg) measurements of materials by differential scanning calorimetry (DSC). Tg is noted in DSC derived heat capacity (Cp) plots against temperature as the jump in Cp or (?Cp) that occurs usually over a temperature interval of a few tens of degrees (¿̐uC). Under conditions which are normal for DSC experiments it was found that the temperature gradient across and from top to bottom of a 0.6-mm-thick molded disk of polycarbonate (17 mg) was no greater than 0.6¿̐uC when heated at 15¿̐uC/min. Under these conditions a glassy polymer can be scanned for its Tg as defined by its half-vitrification temperature (¿̐u ?Cp) as well as the beginning and end of the transition to within 1¿̐uC. DSC Tg measurements are reviewed to show how the location, shape, and magnitude of the transition can be used to characterize the composition and behavior of a wide variety of polymeric materials ranging from homopolymers, blocks, grafts, and blends to networks. Also the effect of molecular weight, plasticizers, aging, crystals, and stress on the Tg of several polymers is re-examined.
Dates of Publication and/or Sequential Designation
Volume 1994, Issue 1249 (January 1994)
Subject(s)
Other Subject(s)
ISBN
080311995X
9780803119956
9780803152878 (e-ISBN)
Digital File Characteristics
text file PDF
Bibliography Note
Includes bibliographical references 51.
Other Forms
Also available in PDF edition.
Also available online via the World Wide Web. Tables of contents and abstracts freely available; full-text articles available by subscription.
Full text article also available for purchase.
Reproduction Note
Electronic reproduction. W. Conshohocken, Pa. : ASTM International, 1994. Mode of access: World Wide Web. System requirements: Web browser. Access may be restricted to users at subscribing institutions.
Technical Details
Mode of access: World Wide Web.
Source of Acquisition
ASTM International PDF Purchase price USD25.
View MARC record | catkey: 27989646