Effect of particle morphology on the emulsion stability and mechanical performance of polyolefin modified asphalts.: An article from: Polymer Engineering and Science
Book Details
Author(s)Amiel B. Sabbagh, Alan J. Lesser
PublisherSociety of Plastics Engineers, Inc.
ISBN / ASINB000987PFG
ISBN-13978B000987PF6
AvailabilityAvailable for download now
Sales Rank14,274,501
MarketplaceUnited States 🇺🇸
Description
This digital document is an article from Polymer Engineering and Science, published by Society of Plastics Engineers, Inc. on May 1, 1998. The length of the article is 3748 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: Recent federal regulations concerning roadbed performance have motivated research in polymer modified asphalt binders. Earlier studies on these binders have shown that many of them are susceptible to gross phase separation when the binder is stored at high temperatures under quiescent conditions. This phase separation, in turn, is affected by the initial morphology and storage conditions. In this effort we investigate the effect of particle morphology on the high-temperature emulsion stability of a low-density polyethylene-modified asphalt binder, as well as the concomitant effects on the mechanical behavior. We show for unstabilized emulsions that the dominant phase separation mechanism shifts from coalescence to creaming at a critical particle radius of 4 [[micro]meter] at 110 [degrees] C. However, stabilized emulsions showed no evidence of gross phase separation for up to 48 hours at 110 [degrees] C. Dramatically different morphologies were observed for the unstabilized and stabilized emulsions; unstabilized emulsions having teardrop shaped particles and stabilized emulsions having both spherical particles and long cylindrical domains. The mechanical behavior, including the high-temperature dynamic viscoelastic behavior and low-temperature fracture toughness, increased with polyolefin content, but was insensitive to the particle morphology.
Citation Details
Title: Effect of particle morphology on the emulsion stability and mechanical performance of polyolefin modified asphalts.
Author: Amiel B. Sabbagh
Publication:Polymer Engineering and Science (Refereed)
Date: May 1, 1998
Publisher: Society of Plastics Engineers, Inc.
Volume: v38 Issue: n5 Page: p707(9)
Distributed by Thomson Gale
From the author: Recent federal regulations concerning roadbed performance have motivated research in polymer modified asphalt binders. Earlier studies on these binders have shown that many of them are susceptible to gross phase separation when the binder is stored at high temperatures under quiescent conditions. This phase separation, in turn, is affected by the initial morphology and storage conditions. In this effort we investigate the effect of particle morphology on the high-temperature emulsion stability of a low-density polyethylene-modified asphalt binder, as well as the concomitant effects on the mechanical behavior. We show for unstabilized emulsions that the dominant phase separation mechanism shifts from coalescence to creaming at a critical particle radius of 4 [[micro]meter] at 110 [degrees] C. However, stabilized emulsions showed no evidence of gross phase separation for up to 48 hours at 110 [degrees] C. Dramatically different morphologies were observed for the unstabilized and stabilized emulsions; unstabilized emulsions having teardrop shaped particles and stabilized emulsions having both spherical particles and long cylindrical domains. The mechanical behavior, including the high-temperature dynamic viscoelastic behavior and low-temperature fracture toughness, increased with polyolefin content, but was insensitive to the particle morphology.
Citation Details
Title: Effect of particle morphology on the emulsion stability and mechanical performance of polyolefin modified asphalts.
Author: Amiel B. Sabbagh
Publication:Polymer Engineering and Science (Refereed)
Date: May 1, 1998
Publisher: Society of Plastics Engineers, Inc.
Volume: v38 Issue: n5 Page: p707(9)
Distributed by Thomson Gale
