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General chemical structure of a series of dimethacrylate crosslinkers and the lengths of the alkyl bridge. (1) Ethylene dimethacrylate, (2) 1,3-butanediol dimethacrylate, (3) 1,4-butanediol dimethacrylate, (4) 1,6-hexanediol dimethacrylate, (5) neopentyl glycol dimethacrylate, (6) 2-methyl-1,8-octanediol dimethacrylate, (7) 1.9-nonanediol dimethacrylate. Adapted from ref. [25] with permission.
