Composites of carbon nanofibers and thermoplastic polyurethanes with shape-memory properties prepared by chaotic mixing.(Technical report): An article from: Polymer Engineering and Science
Book Details
Author(s)Guillermo A. Jimenez, Sadhan C. Jana
PublisherSociety of Plastics Engineers, Inc.
ISBN / ASINB0030I6J2M
ISBN-13978B0030I6J25
AvailabilityAvailable for download now
Sales Rank10,285,631
MarketplaceUnited States 🇺🇸
Description
This digital document is an article from Polymer Engineering and Science, published by Society of Plastics Engineers, Inc. on October 1, 2009. The length of the article is 6702 words. The page length shown above is based on a typical 300-word page. The article is delivered in HTML format and is available immediately after purchase. You can view it with any web browser.
From the author: Composites of carbon nanofibers (CNFs), oxidized carbon nanofibers (ox-CNFs), and shape-memory thermoplastic polyurethane (TPU) were prepared in a chaotic mixer and their shape-memory properties evaluated. The polymer was synthesized from 4,4'-diphenylme-thane diisocyanate, 1,4-butanediol chain extender, and semicrystalline poly([epsilon]-caprolactone) diol soft segments. The shape-memory action was triggered by both conductive and resistive heating. It was found that soft segment crystallinity and mechanical reinforcement by nanofibers produced competing effects on shape-memory properties. A large reduction in soft segment crystallinity in the presence of CNF and stronger mechanical reinforcement by well-dispersed ox-CNF determined the shape-memory properties of the respective composites. It was found that the maximum shape recovery force, respectively, 3 and 4 MPa, was obtained in the cases of 5 and 1 wt% CNF and ox-CNF, respectively, compared with ~1.8 MPa for unfilled TPU. The degree of soft segment and hard segment phase separation and thermal stability of the composites were analyzed. POLYM. ENG. SCI., 49:2020-2030, 2009. [C] 2009 Society of Plastics Engineers
Citation Details
Title: Composites of carbon nanofibers and thermoplastic polyurethanes with shape-memory properties prepared by chaotic mixing.(Technical report)
Author: Guillermo A. Jimenez
Publication:Polymer Engineering and Science (Magazine/Journal)
Date: October 1, 2009
Publisher: Society of Plastics Engineers, Inc.
Volume: 49 Issue: 10 Page: 2020(11)
Article Type: Technical report
Distributed by Gale, a part of Cengage Learning
From the author: Composites of carbon nanofibers (CNFs), oxidized carbon nanofibers (ox-CNFs), and shape-memory thermoplastic polyurethane (TPU) were prepared in a chaotic mixer and their shape-memory properties evaluated. The polymer was synthesized from 4,4'-diphenylme-thane diisocyanate, 1,4-butanediol chain extender, and semicrystalline poly([epsilon]-caprolactone) diol soft segments. The shape-memory action was triggered by both conductive and resistive heating. It was found that soft segment crystallinity and mechanical reinforcement by nanofibers produced competing effects on shape-memory properties. A large reduction in soft segment crystallinity in the presence of CNF and stronger mechanical reinforcement by well-dispersed ox-CNF determined the shape-memory properties of the respective composites. It was found that the maximum shape recovery force, respectively, 3 and 4 MPa, was obtained in the cases of 5 and 1 wt% CNF and ox-CNF, respectively, compared with ~1.8 MPa for unfilled TPU. The degree of soft segment and hard segment phase separation and thermal stability of the composites were analyzed. POLYM. ENG. SCI., 49:2020-2030, 2009. [C] 2009 Society of Plastics Engineers
Citation Details
Title: Composites of carbon nanofibers and thermoplastic polyurethanes with shape-memory properties prepared by chaotic mixing.(Technical report)
Author: Guillermo A. Jimenez
Publication:Polymer Engineering and Science (Magazine/Journal)
Date: October 1, 2009
Publisher: Society of Plastics Engineers, Inc.
Volume: 49 Issue: 10 Page: 2020(11)
Article Type: Technical report
Distributed by Gale, a part of Cengage Learning
