Synthesis of copoly(ethylene terephthalate/imide)s and crystallization kinetics.: An article from: Polymer Engineering and Science
Book Details
Author(s)Lee Soon Park, Dong Chan Lee
PublisherSociety of Plastics Engineers, Inc.
ISBN / ASINB00093RVLY
ISBN-13978B00093RVL2
MarketplaceFrance 🇫🇷
Description
This digital document is an article from Polymer Engineering and Science, published by Society of Plastics Engineers, Inc. on October 15, 1995. The length of the article is 2991 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: Copoly(ethylene terephthalate/imide)s (PETI) were prepared by melt polycondensation of bis(2-hydroxyethyl)terephthalate (BHET) and imide containing comonomer, 4,4[prime]-bis[(4-carbo-2-hydroxyethoxy)phthalimido]diphenylmethane (BHEI) with [Sb.sub.2][O.sub.3] as catalyst at 280 [degrees] C under vacuum ([approximately] 1 mm Hg). The change of [T.sub.m] with an increase of the BHEI repeat unit in the PETI copolymer was analyzed by the Flory equation. On isothermal crystallization, a longer induction time and a lower activation energy than for the PET homopolymer were observed with an increasing amount of the BHEI repeat unit. The Avrami exponent, n, increased from 1.5 to 2.3 as the content of BHEI or crystallization temperature was increased. The Avrami rate constant K decreased with the increase of the BHEI unit, On nonisothermal crystallization, the Ozawa equation and Lawton plot were used to investigate the effect of BHEI units on the crystallization kinetics of PETI copolymers. From the change of the cooling crystallization function and the result of the Lawton plot, it was found that the BHEI unit effectively decreases the rate of crystallization.
Citation Details
Title: Synthesis of copoly(ethylene terephthalate/imide)s and crystallization kinetics.
Author: Lee Soon Park
Publication:Polymer Engineering and Science (Refereed)
Date: October 15, 1995
Publisher: Society of Plastics Engineers, Inc.
Volume: v35 Issue: n19 Page: p1629(7)
Distributed by Thomson Gale
From the author: Copoly(ethylene terephthalate/imide)s (PETI) were prepared by melt polycondensation of bis(2-hydroxyethyl)terephthalate (BHET) and imide containing comonomer, 4,4[prime]-bis[(4-carbo-2-hydroxyethoxy)phthalimido]diphenylmethane (BHEI) with [Sb.sub.2][O.sub.3] as catalyst at 280 [degrees] C under vacuum ([approximately] 1 mm Hg). The change of [T.sub.m] with an increase of the BHEI repeat unit in the PETI copolymer was analyzed by the Flory equation. On isothermal crystallization, a longer induction time and a lower activation energy than for the PET homopolymer were observed with an increasing amount of the BHEI repeat unit. The Avrami exponent, n, increased from 1.5 to 2.3 as the content of BHEI or crystallization temperature was increased. The Avrami rate constant K decreased with the increase of the BHEI unit, On nonisothermal crystallization, the Ozawa equation and Lawton plot were used to investigate the effect of BHEI units on the crystallization kinetics of PETI copolymers. From the change of the cooling crystallization function and the result of the Lawton plot, it was found that the BHEI unit effectively decreases the rate of crystallization.
Citation Details
Title: Synthesis of copoly(ethylene terephthalate/imide)s and crystallization kinetics.
Author: Lee Soon Park
Publication:Polymer Engineering and Science (Refereed)
Date: October 15, 1995
Publisher: Society of Plastics Engineers, Inc.
Volume: v35 Issue: n19 Page: p1629(7)
Distributed by Thomson Gale
