Comparative X-ray scattering, microscopical, and mechanical studies on rectangular plates injection molded from different types of isotactic ... article from: Polymer Engineering and Science
Book Details
PublisherSociety of Plastics Engineers, Inc.
ISBN / ASINB00096LITW
ISBN-13978B00096LIT9
AvailabilityAvailable for download now
MarketplaceUnited States 🇺🇸
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This digital document is an article from Polymer Engineering and Science, published by Society of Plastics Engineers, Inc. on February 1, 1996. The length of the article is 8594 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: Rectangular plates were injection molded from two grades of commercial polypropylene (PP) differing in the molar mass distribution. The mold was mechanically sealed when a desired pressure [p.sub.i,max] (up to 1560 bar) was reached. Samples were taken from each plate at different distances from the gate and were investigated by applying various methods. In spatially resolved wide-angle X-ray studies, the cross section of the samples was scanned with a fine X-ray beam (collimated by a Kratky small-angle camera) and the intensity of scattering was registered by a linear detector as a function of position in the cross section. The evaluation of the scattering data delivered profiles of several parameters, describing the distribution of crystallite modifications [Beta]-PP and [Gamma]-PP, the degree of orientation, the size of crystallites, and interplanar spacing, depending on the distance from surface. These results and those from measurements of birefringence and elongation at break, and from polarization microscopy and transmission electron microscopy, provided details of the layered structures in the plates, at different flow lengths, and allowed far-reaching statements about the influence of molecular properties and processing conditions on the development of texture in the plates.
Citation Details
Title: Comparative X-ray scattering, microscopical, and mechanical studies on rectangular plates injection molded from different types of isotactic polypropylene.
Author: Peter Zipper
Publication:Polymer Engineering and Science (Refereed)
Date: February 1, 1996
Publisher: Society of Plastics Engineers, Inc.
Volume: v36 Issue: n4 Page: p467(16)
Distributed by Thomson Gale
From the author: Rectangular plates were injection molded from two grades of commercial polypropylene (PP) differing in the molar mass distribution. The mold was mechanically sealed when a desired pressure [p.sub.i,max] (up to 1560 bar) was reached. Samples were taken from each plate at different distances from the gate and were investigated by applying various methods. In spatially resolved wide-angle X-ray studies, the cross section of the samples was scanned with a fine X-ray beam (collimated by a Kratky small-angle camera) and the intensity of scattering was registered by a linear detector as a function of position in the cross section. The evaluation of the scattering data delivered profiles of several parameters, describing the distribution of crystallite modifications [Beta]-PP and [Gamma]-PP, the degree of orientation, the size of crystallites, and interplanar spacing, depending on the distance from surface. These results and those from measurements of birefringence and elongation at break, and from polarization microscopy and transmission electron microscopy, provided details of the layered structures in the plates, at different flow lengths, and allowed far-reaching statements about the influence of molecular properties and processing conditions on the development of texture in the plates.
Citation Details
Title: Comparative X-ray scattering, microscopical, and mechanical studies on rectangular plates injection molded from different types of isotactic polypropylene.
Author: Peter Zipper
Publication:Polymer Engineering and Science (Refereed)
Date: February 1, 1996
Publisher: Society of Plastics Engineers, Inc.
Volume: v36 Issue: n4 Page: p467(16)
Distributed by Thomson Gale
