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. Author manuscript; available in PMC: 2020 Apr 1.
Published in final edited form as: Biomaterials. 2019 Feb 5;200:15–24. doi: 10.1016/j.biomaterials.2019.02.004

Figure 2. Hydrogels of alginate grafted with increasing PEG concentration exhibit faster stress relaxation.

Figure 2.

A, Initial elastic modulus of alginate grafted with 2kDa-PEG with degree of substitution (DS) 40 and 60. B, Stress relaxation tests for alginate-PEG hydrogels in A. C, Quantification of timescale at which the stress is relaxed to half its original value, relaxation time, from stress relaxation tests in B. D, Initial elastic modulus of alginate grafted with 5kDa-PEG with DS 16 and 32. E, Stress relaxation tests for alginate-PEG hydrogels in D. F, Quantification of relaxation time from stress relaxation tests in E. G, Initial elastic modulus of alginate grafted with 20kDa-PEG with DS4 and 8. H, Stress relaxation tests for alginate-PEG hydrogels in G. I, Quantification of relaxation time from stress relaxation tests in G.