Chemical modification of polyurethane for two-component injection molding.(Abstract): An article from: Polymer Engineering and Science
Book Details
PublisherSociety of Plastics Engineers, Inc.
ISBN / ASINB0008FB89E
ISBN-13978B0008FB893
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 April 1, 2002. The length of the article is 6028 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: A thermoplastic polyurethane (TPU) was modified by reactive processing with 4.4'-diphenylmethane diisocyanate (MDI). The use of this modified polyurethane was investigated for improved adhesion in composites with polyamide 6 (PA 6). Specimens were prepared by two-component injection molding. With the modified polyurethane the tensile bond strength could be increased by about 50%. An insoluble and inseparable polyurethane residue on the PA 6 fracture surface found by ATRFTIR spectroscopy gave evidence of chemical bonding between PA 6 and TPU. Allophanate bonds were formed by the chemical modification. These groups functioned as an inert source of highly reactive isocyanate groups. Urea groups in the polyurethane chain were formed by the modification, too. These groups may improve the compatibility between the two components. A change in the morphology of the polyurethane was observed, which was caused by the change in molecular structure by the chemical modification. The high level of bond strength may be due to a combination of these phenomena.
Citation Details
Title: Chemical modification of polyurethane for two-component injection molding.(Abstract)
Author: M. Brauer
Publication:Polymer Engineering and Science (Refereed)
Date: April 1, 2002
Publisher: Society of Plastics Engineers, Inc.
Volume: 42 Issue: 4 Page: 859(11)
Article Type: Abstract
Distributed by Thomson Gale
From the author: A thermoplastic polyurethane (TPU) was modified by reactive processing with 4.4'-diphenylmethane diisocyanate (MDI). The use of this modified polyurethane was investigated for improved adhesion in composites with polyamide 6 (PA 6). Specimens were prepared by two-component injection molding. With the modified polyurethane the tensile bond strength could be increased by about 50%. An insoluble and inseparable polyurethane residue on the PA 6 fracture surface found by ATRFTIR spectroscopy gave evidence of chemical bonding between PA 6 and TPU. Allophanate bonds were formed by the chemical modification. These groups functioned as an inert source of highly reactive isocyanate groups. Urea groups in the polyurethane chain were formed by the modification, too. These groups may improve the compatibility between the two components. A change in the morphology of the polyurethane was observed, which was caused by the change in molecular structure by the chemical modification. The high level of bond strength may be due to a combination of these phenomena.
Citation Details
Title: Chemical modification of polyurethane for two-component injection molding.(Abstract)
Author: M. Brauer
Publication:Polymer Engineering and Science (Refereed)
Date: April 1, 2002
Publisher: Society of Plastics Engineers, Inc.
Volume: 42 Issue: 4 Page: 859(11)
Article Type: Abstract
Distributed by Thomson Gale
