Abstract
Semi-biodegradable copolymer networks derived from two immiscible components, a hyaluronan derivative (methacrylated hyaluronan) and poly(ethyl acrylate), have been developed for soft tissue engineering applications. These copolymer networks combine the hydrogel-like properties of hyaluronan networks with the rubber-like behavior and low water uptake of the poly(ethyl acrylate) networks. In order to copolymerize hyaluronan and ethyl acrylate, a hyaluronan derivative containing vinyl groups was first obtained. In spite of the different nature of both polymers, the variation of the weight fraction of ethyl acrylate in the copolymerization yields copolymer networks with co-continuity of phases, and tunable swelling degree and mechanical properties. In addition, the MeHA chains are susceptible of being enzymatically degraded, and the resulting materials are mainly composed of a PEA framework with structural integrity. These copolymers networks are good candidates to assist the regeneration process of soft tissues when longer residence times are required.
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