Abstract
A novel supramolecular network based on carboxylic styrene butadiene rubber (XSBR) and chitosan (CTS) is prepared throughsolution mixing process. XSBR molecular chains have strong interactions with extended CTS via the formation of ammonium carboxylates bridging crosslinks and hydrogen bonds, which efficiently prevent extended CTS from reagglomerating. Compared with CTS nanoparticles, unfolded CTS expose more amino and hydroxyl groups to XSBR, which results in a denser and stronger network structure. However, because of the rigidity of CTS molecule, unfolded CTS construct a rigid framing in the supramolecular network, which reduces the extensibility of the XSBR/CTS composites. Interestingly, the solution mixing retains abundant air bubbles in the XSBR/CTS solution, which turns out a porous composite.
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