Study on Complex Synthesized from Chitosan abd Acrylic Acid Monomers

壳聚糖与丙烯酸单体在无交联剂的情况下进行光引发自由基聚合法制备的聚电解质复合体，其溶胀性随周围介质pH的变化而发生较大的转变，其溶胀能力源于聚电解液相互作用和复合体的分子结构。研究了与聚合物的分子结构、溶胀体积和弹性模数有关的主要性质。样品组分中唯一的变量水(稀释剂)对聚合物的分子结构起着重要作用，因此分子间的键合程度，特别是酰胺键的程度决定了聚合物的溶胀度。水(稀释剂)含量越低，聚合物的干态弹性模量越大，水(稀释剂)含量越高，聚合物的溶胀度越大。

Polyelectrolyte complex based on chitosan and acrylic acid monomers by photoinitiated free radical polymerization in the absence of crosslinker showed a large transition in swelling in response to changes in pH of surrounding medium.Their ability to swell arises from polyelectrolyte interactions and molecular structure of the complex. The main properties of interest that related to the molecular structure, swelling volumes and elastic moduli of the complex have been investigated.The effect of water (diluent), the only variable in sample component played an important role in molecular structure of the complex and as a consequence, the extent of intermolecular linkage, especially amide bonds which in turn governed the degree of swelling of the polyelectrolyte complex in this study.The increased modulus of elasticity at dry state was found in lower water (diluent) content and increased degree of swelling was found in higher water (diluent) content of the complex.