What is it about?
Usually it is thought that tear strength of a polymer or polymeric material depends upon the geometry of the testing sample but their ratio does not changes for the same material. Here, in this article this perception has been found to contradictory to the experimental evidence.
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Why is it important?
The importance of this article is that changes in curing condition of an elastomer like silicone bring about changes in the silicone networks in such a way that the ratio of the values of the tear strengths of different testing geometries for the same materiel does not remain constant.
Perspectives
While comparing the tear strength of elastomers through different geometries samples, it is difficult to deduce conclusion on the basis of other information established for other systems. A realistic approach should again be scientific and based on taking in to account the chemical compositions of the polymer networks and their respective experimentally determined tear tests values. Different curing compositions of an elastomer should be considered and compared as a separate class from that of other ealstomers.
Professor Gul Bali Shah
Pakistan Institute of Fashion Design
Read the Original
This page is a summary of: Aspects of varying crosslinker and catalyst concentrations on tear strength of silicone polymer networks: Comparison of tear strengths using samples of different geometries, Journal of Applied Polymer Science, December 2015, Wiley,
DOI: 10.1002/app.43115.
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