Essential work of fracture of polypropylene and polypropylene blends over a wide range of test speeds.: An article from: Polymer Engineering and Science

This digital document is an article from Polymer Engineering and Science, published by Society of Plastics Engineers, Inc. on January 1, 2003. The length of the article is 4864 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 mechanical properties of extruded films of isotactic polypropylene (iPP) and ethylene-propylene rubber toughened iPP (iPP/EPR) have been analyzed in terms of the specific essential and non-essential work of fracture using high speed tensile test apparatus modified for quasi-static testing in the range 0.0001 to 3 [ms.sup.-1]. Three iPP/EPR grades with modifier contents of 15, 21 and 30 vol% were investigated. As the deformation rate increased, relatively uniform necking of the whole ligament and extensive plastic deformation were progressively replaced by more localized plastic deformation in the blends, and by fully brittle fracture in the unmodified iPP. The non-essential work of fracture and the total fracture energy were highly sensitive to these changes in deformation mechanism. However, the essential work of fracture, although dependent on the test speed, was less correlated with the extent of global plasticity.

Citation Details
Title: Essential work of fracture of polypropylene and polypropylene blends over a wide range of test speeds.
Author: C. Grein
Publication:Polymer Engineering and Science (Refereed)
Date: January 1, 2003
Publisher: Society of Plastics Engineers, Inc.
Volume: 43 Issue: 1 Page: 223(11)

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