Currently, I'm doing research on wearable sensor to monitor physiological parameters for the user. It used epoxidized natural rubber (ENR 50) incorporated graphene paste and expected to improved the tensile strength and electrical properties of the film. However, the result shows a significant drop of tensile strength from sample A (pure latex), sample B (1.0 PHR), sample C (1.5 PHR) and sample D (3.0 PHR) which means sample A got the higher tensile strength compared to sample D (3.0 PHR) as it not follow the pattern. I wonder if the film thickness may play its role on this problems?
Hi Ms. Mohd Anhar,
Check the elongation vs tensile strength. See if there is a pattern. Are you using a TPU film underneath the test inks. This will help stabilize. If you are using a TPU underneath switch to silicone. See if there is a pattern. If none of these try using heat transfer with release paper on final layer using flash dry first at 100C. Heat transfer around 400F for 5-7 seconds - you will need to find best psi to press at. See if this stabilizes. Best regards for your study.
Tensile strength is not influenced by the thickness of the film because it is reported to the film section (N / mm2). In your case the tensile strength is influenced by the incorporated graphene. The higher the percentage of graphene, the tensile strength decreases. There are discontinuous points in the polymer matrix (rubber), which are weak points that can lead to a decrease in resistance. It is a normal fact and logic.
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if your results drop in tensile test and your plots that mean the thickness will effect
Mechanical Properties and Tensile Fatigue of Graphene ... - Hindawi
https://www.hindawi.com/journals/jnm/2013/565401/
by MY Shen - 2013 - Cited by 23 - Related articles
Sep 9, 2013 - Mechanical Properties and Tensile Fatigue of Graphene .... However, the decrease in strength with high nanofiller content can be attributed to ...
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