Tensile Testing of Polymer Hydrogels
The tensile testing of hydrogels can provide important insight into their material properties for research purposes. Typical specimens are often delicate in nature with low strength values. These tests share a unique set of challenges to ensure accurate results.
The challenges of this testing are:
- Testing in-vitro
- Repeatable strain measurement
- Secure gripping of specimens
- Testing in-vitro – Testing in-vitro ensures that the mechanical properties of natural tissues are maintained and that bio-engineered tissues are tested in their working environment. The BioPuls™ Bath allows for the testing of specimens at in-vivo conditions with an adjustable temperature controller. The bath is also compatible with submersible pneumatic grips and compression platens.
- Repeatable strain measurement – Due to the fragile nature of biological soft tissues, a non-contacting extensometer is the ideal solution. The SVE 2 Non-Contacting Video Extensometer can precisely measure elongation under both standard and in-vitro conditions.
- Secure gripping of specimens – Pneumatic grips are recommended to grip the specimens without tearing or inducing slippage. They allow for adjustable gripping pressure and a choice of face dimensions and surfaces. Typically, surfalloy or flat faces with low grit sandpaper are used for best results.
5900 Universal Testing Systems are engineered for precision, built for durability, and offer the flexibility for changing requirements. They are designed with standard and optional features that increase testing efficiency and improve the testing experience for the operator. A wide range of models are available for testing capacities from < 100N up to 600kN.
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The BioPuls submersible pneumatic side action grips and temperature-controlled bath with pneumatic lifting and lowering mechanism is the ideal testing solution for a wide variety of biomedical testing applications.
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The second generation, Standard Advanced Video Extensometer, SVE 2, is a high-performance, non-contacting extensometer that is ideally suited for everyday applications such as rubber, soft plastics,elastomers and other materials with high strain to failure. It can also be used for testing in both ambient and non-ambient temperature conditions.
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Screw side-action grips provide a very simple and efficient method for holding test specimens in a wide range of applications. The dual - acting design of 2710-100 series grips means that jaw faces can be adjusted to accommodate different specimen thicknesses. This ensures that the line of tensile force remains concentric with the grip body. They can be equipped with a selection of interchangeable grip jaw faces in various sizes and choice of surfaces including smooth ground, rubber-coated and serrated. Line contact and special coated faces are also available.The unique ‘snap-on’ jaw face attachment makes changing faces extremely quick and simple.
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