Crystallization of syndiotactic polystyrene.(First Symposium on Oriented Polymers ): An article from: Polymer Engineering and Science
Book Details
Author(s)S. St. Lawrence, D.M. Shinozaki
PublisherSociety of Plastics Engineers, Inc.
ISBN / ASINB00097VEXG
ISBN-13978B00097VEX8
AvailabilityAvailable for download now
Sales Rank99,999,999
MarketplaceUnited States 🇺🇸
Description
This digital document is an article from Polymer Engineering and Science, published by Society of Plastics Engineers, Inc. on November 1, 1997. The length of the article is 4799 words. The page length shown above is based on a typical 300-word page. The article is delivered in HTML format and is available in your Amazon.com Digital Locker immediately after purchase. You can view it with any web browser.
From the author: The crystallization of syndiotactic polystyrene (sPS) was studied over the temperature range from the glass transition ([T.sub.g]) to the melting point ([T.sub.m]). Using transmission electron and optical microscopies, the different lamellar and spherulitic microstructures which were formed over this temperature range were correlated with the measured crystallization kinetics. The rate of crystallization was measured isothermally using thin samples in a differential scanning calorimeter. The low temperature transformations were achieved by quenching first to the amorphous state, then reheating. The experimental measurements at both high and low temperatures of transformation could be closely fitted to the predicted rate constant. It was found that to estimate the crystallization parameters most accurately, the data must be fitted simultaneously at high and low temperatures and a relatively high value for the equilibrium melting temperature (561 K) must be used. The nonisothermal crystallization kinetics have been predicted from the isothermal experiments using Nakamura's model in a manner similar to earlier work on other polymers.
Citation Details
Title: Crystallization of syndiotactic polystyrene.(First Symposium on Oriented Polymers )
Author: S. St. Lawrence
Publication:Polymer Engineering and Science (Refereed)
Date: November 1, 1997
Publisher: Society of Plastics Engineers, Inc.
Volume: 37 Issue: 11 Page: 1825(8)
Distributed by Thomson Gale
From the author: The crystallization of syndiotactic polystyrene (sPS) was studied over the temperature range from the glass transition ([T.sub.g]) to the melting point ([T.sub.m]). Using transmission electron and optical microscopies, the different lamellar and spherulitic microstructures which were formed over this temperature range were correlated with the measured crystallization kinetics. The rate of crystallization was measured isothermally using thin samples in a differential scanning calorimeter. The low temperature transformations were achieved by quenching first to the amorphous state, then reheating. The experimental measurements at both high and low temperatures of transformation could be closely fitted to the predicted rate constant. It was found that to estimate the crystallization parameters most accurately, the data must be fitted simultaneously at high and low temperatures and a relatively high value for the equilibrium melting temperature (561 K) must be used. The nonisothermal crystallization kinetics have been predicted from the isothermal experiments using Nakamura's model in a manner similar to earlier work on other polymers.
Citation Details
Title: Crystallization of syndiotactic polystyrene.(First Symposium on Oriented Polymers )
Author: S. St. Lawrence
Publication:Polymer Engineering and Science (Refereed)
Date: November 1, 1997
Publisher: Society of Plastics Engineers, Inc.
Volume: 37 Issue: 11 Page: 1825(8)
Distributed by Thomson Gale
