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. Author manuscript; available in PMC: 2021 Feb 1.
Published in final edited form as: Biomaterials. 2019 Oct 23;230:119567. doi: 10.1016/j.biomaterials.2019.119567

Figure 4. Mechanical Properties of vascular grafts.

Figure 4.

Uniaxial tensile properties were determined for a range of silk formulations to determine the difference in properties as a function of molecular weight and concentration. Concentrations of 9 % w/v for 5MB, 14 % w/v for 10MB, 17 % for 15MB and 25% w/v for 20MB silk solutions were tested. (A) From the resulting stress strain curves (representative curves shown here for low (20 MB), medium (10 MB) and high (5 MB) molecular weights) the young’s modulus was calculated from the slope of the linear region below 5% (C), and Poisson ratio was calculated as the ratio of transverse strain to axial strain (D). The suture retention strength (B) was defined as the force required to pull through the tube or cause the wall to fail. There was a linear trend with decreasing elastic moduli (indicative of greater elasticity) and decreasing suture retention strength as the molecular weight increased and the concentration decreased.