Determination of the fracture toughness of thermoformed polypropylene cups by the essential work method.(International Forum on Polymers - 1996): An article from: Polymer Engineering and Science
Book Details
Author(s)A. Pegoretti, A. Marchi, T. Ricco
PublisherSociety of Plastics Engineers, Inc.
ISBN / ASINB00097QKB2
ISBN-13978B00097QKB8
AvailabilityAvailable for download now
Sales Rank12,747,039
MarketplaceUnited States 🇺🇸
Description
This digital document is an article from Polymer Engineering and Science, published by Society of Plastics Engineers, Inc. on June 1, 1997. The length of the article is 2857 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: In this work the anisotropic fracture behavior of neat and rubber-modified polypropylene cups induced by a vacuum thermoforming process is studied. The effect of different draw-ratios is also examined. An elasto-plastic fracture mechanics approach, based on the method of the essential work of fracture, is applied to samples cut from the thermoformed cups both longitudinally and transversally to the drawing direction. For all the products examined a strong anisotropy in the fracture behavior is observed. The fracture resistance for cracks propagating along the drawing direction is lower than in the transverse direction, this fracture anisotropy being enhanced at higher draw-ratio. The presence of the rubber particles results in an increase In the fracture toughness for cracks running transversally to the drawing direction, but, at the same time, it seriously reduces the fracture resistance for cracks propagating along the drawing direction. In order to better understand the dependence of the fracture behavior upon the processing conditions and material structure, dynamic mechanical thermal analysis, transmission electron microscopy, and X-ray diffraction measurements are also carried out.
Citation Details
Title: Determination of the fracture toughness of thermoformed polypropylene cups by the essential work method.(International Forum on Polymers - 1996)
Author: A. Pegoretti
Publication:Polymer Engineering and Science (Refereed)
Date: June 1, 1997
Publisher: Society of Plastics Engineers, Inc.
Volume: v37 Issue: n6 Page: p1045(8)
Distributed by Thomson Gale
From the author: In this work the anisotropic fracture behavior of neat and rubber-modified polypropylene cups induced by a vacuum thermoforming process is studied. The effect of different draw-ratios is also examined. An elasto-plastic fracture mechanics approach, based on the method of the essential work of fracture, is applied to samples cut from the thermoformed cups both longitudinally and transversally to the drawing direction. For all the products examined a strong anisotropy in the fracture behavior is observed. The fracture resistance for cracks propagating along the drawing direction is lower than in the transverse direction, this fracture anisotropy being enhanced at higher draw-ratio. The presence of the rubber particles results in an increase In the fracture toughness for cracks running transversally to the drawing direction, but, at the same time, it seriously reduces the fracture resistance for cracks propagating along the drawing direction. In order to better understand the dependence of the fracture behavior upon the processing conditions and material structure, dynamic mechanical thermal analysis, transmission electron microscopy, and X-ray diffraction measurements are also carried out.
Citation Details
Title: Determination of the fracture toughness of thermoformed polypropylene cups by the essential work method.(International Forum on Polymers - 1996)
Author: A. Pegoretti
Publication:Polymer Engineering and Science (Refereed)
Date: June 1, 1997
Publisher: Society of Plastics Engineers, Inc.
Volume: v37 Issue: n6 Page: p1045(8)
Distributed by Thomson Gale
