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Melting behavior, crystallization kinetics and morphology of random copolyesters of poly(2-hydroxyethoxybenzoate) with [epsilon]-caprolactone.: An article from: Polymer Engineering and Science
Book Details
PublisherSociety of Plastics Engineers, Inc.
ISBN / ASINB0008FVNHG
ISBN-13978B0008FVNH8
AvailabilityAvailable for download now
MarketplaceUnited States 🇺🇸
Description
This digital document is an article from Polymer Engineering and Science, published by Society of Plastics Engineers, Inc. on November 1, 2002. The length of the article is 3900 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 melting behavior after isothermal crystallization and the crystallization kinetics of random poly(2-hydroxyethoxybenzoate/[epsilon]-caprolactone) copolymers rich in 2-hydroxyethoxybenzoate units were investigated by means of differential scanning calorimetry and hot-stage optical microscopy. The observed multiple endotherms, which are commonly displayed by polyesters, were found to be influenced both by crystallization temperature and composition. By applying the Hoffman-Weeks method to the melting temperatures of isothermally crystallized samples, the equilibrium melting temperatures of the copolymers were obtained. Furthermore, isothermal crystallization kinetics was analyzed according to the Avrami treatment. Values of the exponent n close to 3 were obtained, independently of crystallization temperature and composition, in agreement with a crystallization process originating from predeterminated nuclei and characterized by three-dimensional spherulitic growth. Space-filling banded spherulites were obse rved by hot-stage optical polarizing microscopy at all the crystallization temperatures explored, the band spacing being affected by both crystallization temperature and composition. As expected, the introduction of [epsilon]-caprolactone comonomeric units in the polymer chain of PHEBA was found to decrease its crystallization rate.
Citation Details
Title: Melting behavior, crystallization kinetics and morphology of random copolyesters of poly(2-hydroxyethoxybenzoate) with [epsilon]-caprolactone.
Author: Lara Finelli
Publication:Polymer Engineering and Science (Refereed)
Date: November 1, 2002
Publisher: Society of Plastics Engineers, Inc.
Volume: 42 Issue: 11 Page: 2137(9)
Distributed by Thomson Gale
From the author: The melting behavior after isothermal crystallization and the crystallization kinetics of random poly(2-hydroxyethoxybenzoate/[epsilon]-caprolactone) copolymers rich in 2-hydroxyethoxybenzoate units were investigated by means of differential scanning calorimetry and hot-stage optical microscopy. The observed multiple endotherms, which are commonly displayed by polyesters, were found to be influenced both by crystallization temperature and composition. By applying the Hoffman-Weeks method to the melting temperatures of isothermally crystallized samples, the equilibrium melting temperatures of the copolymers were obtained. Furthermore, isothermal crystallization kinetics was analyzed according to the Avrami treatment. Values of the exponent n close to 3 were obtained, independently of crystallization temperature and composition, in agreement with a crystallization process originating from predeterminated nuclei and characterized by three-dimensional spherulitic growth. Space-filling banded spherulites were obse rved by hot-stage optical polarizing microscopy at all the crystallization temperatures explored, the band spacing being affected by both crystallization temperature and composition. As expected, the introduction of [epsilon]-caprolactone comonomeric units in the polymer chain of PHEBA was found to decrease its crystallization rate.
Citation Details
Title: Melting behavior, crystallization kinetics and morphology of random copolyesters of poly(2-hydroxyethoxybenzoate) with [epsilon]-caprolactone.
Author: Lara Finelli
Publication:Polymer Engineering and Science (Refereed)
Date: November 1, 2002
Publisher: Society of Plastics Engineers, Inc.
Volume: 42 Issue: 11 Page: 2137(9)
Distributed by Thomson Gale
