Abstract
Control of dimensional stability is crucial for using electrospun membranes in biomedical and tissue engineering applications. In this study, the contraction of electrospun membranes of poly(l-lactide-co-glycolide) (PLLGA) after stretch was investigated. Then, by adding PLLGA-b-polyethylene glycol (PLLGA-PEG), the contraction of the membranes was controlled. In addition, the mechanical properties of the membranes were investigated. On the basis of the strain–stress behavior of the membranes, an elongation of 50 % was used to investigate the orientation degrees of the membrane fibers. On the basis of the morphology of the stretched membranes, the contraction was found to depend on the orientation degree of fibers after stretch. A linear relationship between the contraction and degree of orientation after stretch was confirmed. Two-dimensional fast Fourier transform (2D FFT) analysis of the scanning electron microscopy (SEM) images of the membranes was used to quantify the orientation degree. It was surmised that the different orientation degrees were responsible for the different morphologies and thermal behaviors of the membranes.
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We are grateful to the financial support by West Light Foundation of The Chinese Academy of Sciences
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Ma, C., Wang, B., Xiong, CD. et al. Dimensional stability of electrospun membranes of poly(l-lactide-co-glycolide)/poly(l-lactide-co-glycolide)-b-polyethylene glycol blends under stretch. J Polym Res 19, 29 (2012). https://doi.org/10.1007/s10965-012-0029-9
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DOI: https://doi.org/10.1007/s10965-012-0029-9