Polymers under mechanical stress: deformation of the nanostructure of isotactic polypropylene revealed by scanning force microscopy.(French Research ... article from: Polymer Engineering and Science
Book Details
Author(s)G. Castelein, G. Coulon, C. G'sell
PublisherSociety of Plastics Engineers, Inc.
ISBN / ASINB00097TKMI
ISBN-13978B00097TKM8
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 October 1, 1997. The length of the article is 4546 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: Scanning force microscopy (SFM) was used to study the lamellar morphology of [Alpha] and [Beta] spherulites in bulk intruded isotactic polypropylene (iPP) samples deformed under shear stress. The iPP specimens were sheared at a constant shear rate at room temperature. Just beyond yielding, at a shear strain level of 0.5, the lamellar structure of the [Alpha]-spherulites resembles that for unsheared iPP; few cracks are observed along the interfaces between neighboring [Alpha]-spherulites: this behavior is attributed to a "cross-hatched" lamellar texture of the [Alpha]-spherulites. In [Beta]-spherulites, at the same shear strain, SFM observations reveal the presence of nanocracks perpendicular to the principal tensile strain axis, going through stacks of crystalline lamellae. Profuse local lamellar kinkings occur along the principal compressive strain axis and few nanocracks parallel to the molecular axis are seen in individual lamellae that lie along the shear direction. Neither particular preferred lamellar orientation nor localization of deformation within shear bands has been detected.
Citation Details
Title: Polymers under mechanical stress: deformation of the nanostructure of isotactic polypropylene revealed by scanning force microscopy.(French Research on Structural Properties of Polymers)
Author: G. Castelein
Publication:Polymer Engineering and Science (Refereed)
Date: October 1, 1997
Publisher: Society of Plastics Engineers, Inc.
Volume: v37 Issue: n10 Page: p1694(8)
Distributed by Thomson Gale
From the author: Scanning force microscopy (SFM) was used to study the lamellar morphology of [Alpha] and [Beta] spherulites in bulk intruded isotactic polypropylene (iPP) samples deformed under shear stress. The iPP specimens were sheared at a constant shear rate at room temperature. Just beyond yielding, at a shear strain level of 0.5, the lamellar structure of the [Alpha]-spherulites resembles that for unsheared iPP; few cracks are observed along the interfaces between neighboring [Alpha]-spherulites: this behavior is attributed to a "cross-hatched" lamellar texture of the [Alpha]-spherulites. In [Beta]-spherulites, at the same shear strain, SFM observations reveal the presence of nanocracks perpendicular to the principal tensile strain axis, going through stacks of crystalline lamellae. Profuse local lamellar kinkings occur along the principal compressive strain axis and few nanocracks parallel to the molecular axis are seen in individual lamellae that lie along the shear direction. Neither particular preferred lamellar orientation nor localization of deformation within shear bands has been detected.
Citation Details
Title: Polymers under mechanical stress: deformation of the nanostructure of isotactic polypropylene revealed by scanning force microscopy.(French Research on Structural Properties of Polymers)
Author: G. Castelein
Publication:Polymer Engineering and Science (Refereed)
Date: October 1, 1997
Publisher: Society of Plastics Engineers, Inc.
Volume: v37 Issue: n10 Page: p1694(8)
Distributed by Thomson Gale
