Polymers from chitin or chitosan

Chitosan is also a natural product and can be obtained via (partial) deacetylation of chitin, most commonly by aqueous alkali, although this N-deacetylation is almost never complete 

The improved solubility of chitosan enables the synthesis of biomaterial conjugates by grafting of synthetic hydrophobic polymers, which induce amphiphilic pH sensitive and thermally sensitive properties (Baldwin and Kiick, 2009). 

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