Technical Paper Archive


This site contains all papers presented at Rubber Division, ACS Technical Meetings from 2000-2018. Meetings prior to 2000 are incomplete and papers are added as they are digitized.


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Necking in silica filled poly(dimethylsiloXane) and the resulting mechanical properties of the tneckedi material

C4

Event: 182nd Technical Meeting
Location: Cincinnati, OH
Date: October 09, 2012
Author: Oluwaseyi (Shay) Ogebule*, Grigori A Medvedev, and James M Caruthers
Paper Number: C4

Price: $20.00

  • 9th Annual Student Colloquium and Poster Session.
    Necking is well known phenomena in uniaxial extension for filled and unfilled semi-crystalline polymers as well as in amorphous polymers below their glass transition temperature (Tg), however, necking has not been observed for elastomers above Tg. We report for the first time, the necking behavior for a lightly cross-linked poly(dimethylsiloxane) elastomer filled with 30phr or more of high surface area (>3OOm2/g) fumed silica. The linear and non-linear mechanical properties of the neck material have been studied via (i) linear and nonlinear dynamic shear analysis including the Payne effect, (ii) uniaxial tension experiments including the Mullins effect, (iii) tensile strength and (iv) tear resistance Via the "trouser" test. The results for the necked material were compared to those for the silica-filled PDMS rubber systems where the filler content, surface area and surface treatment were such that necking was not observed. The tensile strength and tear resistance of the necked material was found to be on the average 50 to 100% higher than the corresponding values for non-neck forming systems. It is postulated that the mechanism for the observed necking behavior is the aggregate breakage.

    Papers from 182nd Technical Meeting

    Items from 182nd Technical Meeting