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A new method to determine the Avrami exponent by d.s.c. studies of non-isothermal crystallization from the molten state

✍ Scribed by C. Cazé; E. Devaux; A. Crespy; J.P. Cavrot

Publisher
Elsevier Science
Year
1997
Tongue
English
Weight
424 KB
Volume
38
Category
Article
ISSN
0032-3861

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✦ Synopsis

The method reported in this paper is a simple means by which to determine the Avrami exponent, n, after cooling from the molten state of semi-crystalline polymers. This determination, often drudgery, has been significantly simplified, yet remains satisfactorily reliable. It is based on the measurement, from an experimental crystallization exotherm, of the peak maximum and its inflexion points for different cooling rates. Results were tested against the Ozawa theory, and it was found that our method was suitable for a slightly filled or unfilled thermoplastic polymer. However, neither our method nor the Ozawa theory apply when the matrix is reinforced with an efficient nucleating agent.

📜 SIMILAR VOLUMES

Shall we require four years of high scho
Shall we require four years of high school study?**This important communication is reprinted from the August Druggists’ Circular. p. 286. and is based on an inquiry address to Dr. Downing by the Druggists’ Circular when it became known that he had expressed his opposition to any change in the New York State Pharmam Law, which would make the completion of four years of high school study a prerequisite to pharmaceutical registration after July 1923. Th readers wiU understand thal & p n s d references arc made to the $wblicatMn from whuh the communication is repiutcd.
✍ Downing, Augustus S. 📂 Article 📅 1921 🏛 Elsevier ⚖ 242 KB 👁 2 views