Reactive extrusion of acrylic acid grafted polypropylene with hexadecylamine.: An article from: Polymer Engineering and Science
Book Details
PublisherSociety of Plastics Engineers, Inc.
ISBN / ASINB00092YRNU
ISBN-13978B00092YRN3
MarketplaceFrance 🇫🇷
Description
This digital document is an article from Polymer Engineering and Science, published by Society of Plastics Engineers, Inc. on December 15, 1994. The length of the article is 3292 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: To study the possibility of the production of branched polypropylene (PP) by a reactive extrusion (REX) route, side chains were introduced on the backbone of a polypropylene material by reacting hexadecylamine with acrylic acid grafted PP. Experiments were carried out both in solution and in the melt, and the products were analyzed by FTIR, elemental analysis, dynamic mechanical, and rheological techniques. Analysis of the FTIR spectra of the samples produced in the solution reactions, at an equal molar ratio of [-N[H.sub.2]]/[-COOH] without catalyst addition and without removal of the by-product, revealed that the formation of imide was increased with increasing the reaction time up to 10 h, while a further increase in reaction time resulted in a reversal of the reaction. In the REX experiments, FTIR analysis showed that the imide formation increased with the [-N[H.sub.2]]/[-COOH] molar ratio. At a molar ratio of one, more imide was present in the REX product than the in-solution one. Elemental analysis suggested that the nitrogen content in the products initially increased with [-N[H.sub.2]]/[-COOH] molar ratio and then reached an almost constant value at molar ratio values of about unity. The glass transition temperature ([T.sub.g]) was measured by dynamic mechanical analysis (DMA), and it was found that the attachment of the alkyl chains Caused a reduction in [T.sub.g] of the products. Finally, rheological measurements showed that the shear viscosity of the products increased with the amine/carboxyl molar ratio at low shear rates and that their moduli were enhanced as a result of the attachment of the alkyl side chains.
Citation Details
Title: Reactive extrusion of acrylic acid grafted polypropylene with hexadecylamine.
Author: X.C. Wang
Publication:Polymer Engineering and Science (Refereed)
Date: December 15, 1994
Publisher: Society of Plastics Engineers, Inc.
Volume: v34 Issue: n23 Page: p1750(8)
Distributed by Thomson Gale
From the author: To study the possibility of the production of branched polypropylene (PP) by a reactive extrusion (REX) route, side chains were introduced on the backbone of a polypropylene material by reacting hexadecylamine with acrylic acid grafted PP. Experiments were carried out both in solution and in the melt, and the products were analyzed by FTIR, elemental analysis, dynamic mechanical, and rheological techniques. Analysis of the FTIR spectra of the samples produced in the solution reactions, at an equal molar ratio of [-N[H.sub.2]]/[-COOH] without catalyst addition and without removal of the by-product, revealed that the formation of imide was increased with increasing the reaction time up to 10 h, while a further increase in reaction time resulted in a reversal of the reaction. In the REX experiments, FTIR analysis showed that the imide formation increased with the [-N[H.sub.2]]/[-COOH] molar ratio. At a molar ratio of one, more imide was present in the REX product than the in-solution one. Elemental analysis suggested that the nitrogen content in the products initially increased with [-N[H.sub.2]]/[-COOH] molar ratio and then reached an almost constant value at molar ratio values of about unity. The glass transition temperature ([T.sub.g]) was measured by dynamic mechanical analysis (DMA), and it was found that the attachment of the alkyl chains Caused a reduction in [T.sub.g] of the products. Finally, rheological measurements showed that the shear viscosity of the products increased with the amine/carboxyl molar ratio at low shear rates and that their moduli were enhanced as a result of the attachment of the alkyl side chains.
Citation Details
Title: Reactive extrusion of acrylic acid grafted polypropylene with hexadecylamine.
Author: X.C. Wang
Publication:Polymer Engineering and Science (Refereed)
Date: December 15, 1994
Publisher: Society of Plastics Engineers, Inc.
Volume: v34 Issue: n23 Page: p1750(8)
Distributed by Thomson Gale
