High-strength and low-stiffness composites of nanoclay-filled thermoplastic polyurethanes.: An article from: Polymer Engineering and Science
Book Details
Author(s)Asim Pattanayak, Sadhan C. Jana
PublisherThomson Gale
ISBN / ASINB000DN8KWE
ISBN-13978B000DN8KW8
AvailabilityAvailable for download now
MarketplaceUnited States 🇺🇸
Description
This digital document is an article from Polymer Engineering and Science, published by Thomson Gale on November 1, 2005. The length of the article is 5687 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: In this study, bulk polymerized clay-tethered thermoplastic polyurethane (TPU) composites were synthesized that offered much improved tensile strength with negligible changes in tensile modulus. These composites contained intercalated, tethered layered silicate particles and were synthesized by mixing low molecular weight prepolymer chains containing unreacted -NCO groups with reactive layered silicate clay followed by catalyzed chain extension reaction with butanediol. The molar ratio of -NCO and -OH functional groups in the composite was varied between 1.0 and 1.2. It was found that an appreciable amount of -NCO groups was consumed in reaction with moisture present in the clay and some in quaternary ammonium ion-catalyzed dimerization and trimerization. Composites with -NCO to -OH molar ratio 1.1 provided the best improvement in mechanical properties--the composite with 5 wt% clay provided a 60% increase in tensile strength and 50% increase in strain at break, while the tensile modulus increased only by 15% over TPU. POLYM. ENG. SCI., 45:1532-1539, 2005. [c] 2005 Society of Plastics Engineers
Citation Details
Title: High-strength and low-stiffness composites of nanoclay-filled thermoplastic polyurethanes.
Author: Asim Pattanayak
Publication:Polymer Engineering and Science (Magazine/Journal)
Date: November 1, 2005
Publisher: Thomson Gale
Volume: 45 Issue: 11 Page: 1532(8)
Distributed by Thomson Gale
From the author: In this study, bulk polymerized clay-tethered thermoplastic polyurethane (TPU) composites were synthesized that offered much improved tensile strength with negligible changes in tensile modulus. These composites contained intercalated, tethered layered silicate particles and were synthesized by mixing low molecular weight prepolymer chains containing unreacted -NCO groups with reactive layered silicate clay followed by catalyzed chain extension reaction with butanediol. The molar ratio of -NCO and -OH functional groups in the composite was varied between 1.0 and 1.2. It was found that an appreciable amount of -NCO groups was consumed in reaction with moisture present in the clay and some in quaternary ammonium ion-catalyzed dimerization and trimerization. Composites with -NCO to -OH molar ratio 1.1 provided the best improvement in mechanical properties--the composite with 5 wt% clay provided a 60% increase in tensile strength and 50% increase in strain at break, while the tensile modulus increased only by 15% over TPU. POLYM. ENG. SCI., 45:1532-1539, 2005. [c] 2005 Society of Plastics Engineers
Citation Details
Title: High-strength and low-stiffness composites of nanoclay-filled thermoplastic polyurethanes.
Author: Asim Pattanayak
Publication:Polymer Engineering and Science (Magazine/Journal)
Date: November 1, 2005
Publisher: Thomson Gale
Volume: 45 Issue: 11 Page: 1532(8)
Distributed by Thomson Gale
