Influence of side-chain structures on the viscoelasticity and elongation viscosity of polyethylene melts.: An article from: Polymer Engineering and Science
Book Details
PublisherSociety of Plastics Engineers, Inc.
ISBN / ASINB0008FVNJO
ISBN-13978B0008FVNJ8
AvailabilityAvailable for download now
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MarketplaceUnited States 🇺🇸
Description
This digital document is an article from Polymer Engineering and Science, published by Society of Plastics Engineers, Inc. on November 1, 2002. The length of the article is 3252 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: Metallocene-catalyzed, low-density and linear low-density polyethylenes with similar melt indexes were used to investigate how side-chain structures influence the elongation viscosity and viscoelastic properties. The viscoelastic properties were determined with a rotation rheometer, while the elongation viscosities were acquired by using isothermal fiber spinning. The Phan-Thien-Tanner [PTT] model was also used to understand how the side-chain structure affects the elongation behavior. Experimental results demonstrate that the log G' vs. log G" plot can qualitatively describe the effects of the side chain branch on the rheological properties of polyethylene melts. According to the results determined by the PTT model, low-density polyethylene [LDPE] has low elongation viscosities at high strain rates. This low elongation viscosity can be attributed to the fact that LDPE has high shear thinning behavior. The long-chain branching tends to increase entanglements, thereby enhancing the storage modulus, elongation viscosity and shear-thinning behaviors. Uniform side-chain distribution lowers the entanglements, which results in a low storage modulus, elongation viscosity and shear-thinning behavior.
Citation Details
Title: Influence of side-chain structures on the viscoelasticity and elongation viscosity of polyethylene melts.
Author: Gwo-Geng Lin
Publication:Polymer Engineering and Science (Refereed)
Date: November 1, 2002
Publisher: Society of Plastics Engineers, Inc.
Volume: 42 Issue: 11 Page: 2213(9)
Distributed by Thomson Gale
From the author: Metallocene-catalyzed, low-density and linear low-density polyethylenes with similar melt indexes were used to investigate how side-chain structures influence the elongation viscosity and viscoelastic properties. The viscoelastic properties were determined with a rotation rheometer, while the elongation viscosities were acquired by using isothermal fiber spinning. The Phan-Thien-Tanner [PTT] model was also used to understand how the side-chain structure affects the elongation behavior. Experimental results demonstrate that the log G' vs. log G" plot can qualitatively describe the effects of the side chain branch on the rheological properties of polyethylene melts. According to the results determined by the PTT model, low-density polyethylene [LDPE] has low elongation viscosities at high strain rates. This low elongation viscosity can be attributed to the fact that LDPE has high shear thinning behavior. The long-chain branching tends to increase entanglements, thereby enhancing the storage modulus, elongation viscosity and shear-thinning behaviors. Uniform side-chain distribution lowers the entanglements, which results in a low storage modulus, elongation viscosity and shear-thinning behavior.
Citation Details
Title: Influence of side-chain structures on the viscoelasticity and elongation viscosity of polyethylene melts.
Author: Gwo-Geng Lin
Publication:Polymer Engineering and Science (Refereed)
Date: November 1, 2002
Publisher: Society of Plastics Engineers, Inc.
Volume: 42 Issue: 11 Page: 2213(9)
Distributed by Thomson Gale
