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Effects of Photo Oxidation on the Mechanical Behavior of Polymeric Materials: An Experimental Study.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Effects of Photo Oxidation on the Mechanical Behavior of Polymeric Materials: An Experimental Study./
作者:	Korayem, Abd-Elrahman.
出版者:	Ann Arbor : ProQuest Dissertations & Theses, : 2021,
面頁冊數:	43 p.
附註:	Source: Masters Abstracts International, Volume: 82-12.
Contained By:	Masters Abstracts International82-12.
標題:	Civil engineering. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=28497956
ISBN:	9798505545072

Effects of Photo Oxidation on the Mechanical Behavior of Polymeric Materials: An Experimental Study.
Korayem, Abd-Elrahman.

Effects of Photo Oxidation on the Mechanical Behavior of Polymeric Materials: An Experimental Study. - Ann Arbor : ProQuest Dissertations & Theses, 2021 - 43 p.

Source: Masters Abstracts International, Volume: 82-12.

Thesis (M.S.)--Michigan State University, 2021.

This item must not be sold to any third party vendors.

Here, an experimental study is carried out to understand the degradation of crosslinked polymeric materials by exposure to coupled thermo- and photo-oxidation, and their effects on mechanical behavior of the material. Our investigation specifically focuses on two cured elastomeric adhesives: (i) a silicon-based and (ii) a polyurethane-based adhesive. Samples were prepared and subjected to UV radiation at three different temperatures namely 45, 60 and 80C, for different aging periods ranging from 1 to 150 days. Chemical damage is characterized by the FTIR, DSC and Swelling tests which help us to monitor the change in the chemical composition of the materials along the aging durations and conditions. Mechanical damage is characterized by uniaxial tensile failure test, cyclic tensile test and permanent set test. These tests revealed the change of behavior of our materials along the aging periods and conditions. The changes in mechanical behavior vary depending on the material, aging temperature and duration. We show that behavior of the materials aged in the photo-oxidative environment is in fact a result of a combination of two separable modes of damage, Mechanical and Environmental. Accordingly, We are able to further separate the environmental damage mode into one created by the effects of temperature and another created by the combination of temperature and radiation. This separability has been confirmed with a Neo-hookean model, which proved that for a combined state of aging such as photo-oxidation the material cannot be characterized by models which consider only single modes of damage. Such regimes would require approaches such as the micro-mechanical approach to fully consider the effects by all the damage modes found in complex aging phenomena.

ISBN: 9798505545072Subjects--Topical Terms:

860360
Civil engineering.
Subjects--Index Terms:

Thermo- and photo-oxidation

Effects of Photo Oxidation on the Mechanical Behavior of Polymeric Materials: An Experimental Study.
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