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Effect of molecular structure on the rotational molding characteristics of ultra-low-density ethylene-[alpha]-olefin copolymers.: An article from: Polymer Engineering and Science
Book Details
Author(s)W.Q. Wang, M. Kontopoulou
PublisherSociety of Plastics Engineers, Inc.
ISBN / ASINB000829MWM
ISBN-13978B000829MW9
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 March 1, 2004. The length of the article is 4265 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: The rotational molding characteristics of two ultra-low-density ethylene-[alpha]-olefin copolymers with elastomeric properties (polyolefin plastomers), made by metallocene catalysts, were investigated with the purpose of examining the effect of molecular structure on their processability. Particle coalescence and densification experiments revealed that higher comonomer content resulted in slower rates of coalescence and densification, thus affecting bubble content. Based on detailed material characterization, slower densification was attributed to the presence of broad melting endotherms, higher viscosity immediately after the melting transition, and higher melt elasticity. Investigation of the effect of particulate form revealed that use of powders instead of micropellets resulted in the formation of fewer bubbles on the outer surface, because of the broader particle size distribution, leading to improved appearance, better mechanical properties, and reduced overall processing time. Rotomolded parts displayed excellent impact properties and a high degree of flexibility. Polym. Eng. Sci. 44:496-508, 2004.
Citation Details
Title: Effect of molecular structure on the rotational molding characteristics of ultra-low-density ethylene-[alpha]-olefin copolymers.
Author: W.Q. Wang
Publication:Polymer Engineering and Science (Refereed)
Date: March 1, 2004
Publisher: Society of Plastics Engineers, Inc.
Volume: 44 Issue: 3 Page: 496(13)
Distributed by Thomson Gale
From the author: The rotational molding characteristics of two ultra-low-density ethylene-[alpha]-olefin copolymers with elastomeric properties (polyolefin plastomers), made by metallocene catalysts, were investigated with the purpose of examining the effect of molecular structure on their processability. Particle coalescence and densification experiments revealed that higher comonomer content resulted in slower rates of coalescence and densification, thus affecting bubble content. Based on detailed material characterization, slower densification was attributed to the presence of broad melting endotherms, higher viscosity immediately after the melting transition, and higher melt elasticity. Investigation of the effect of particulate form revealed that use of powders instead of micropellets resulted in the formation of fewer bubbles on the outer surface, because of the broader particle size distribution, leading to improved appearance, better mechanical properties, and reduced overall processing time. Rotomolded parts displayed excellent impact properties and a high degree of flexibility. Polym. Eng. Sci. 44:496-508, 2004.
Citation Details
Title: Effect of molecular structure on the rotational molding characteristics of ultra-low-density ethylene-[alpha]-olefin copolymers.
Author: W.Q. Wang
Publication:Polymer Engineering and Science (Refereed)
Date: March 1, 2004
Publisher: Society of Plastics Engineers, Inc.
Volume: 44 Issue: 3 Page: 496(13)
Distributed by Thomson Gale
