スチレン/多糖グラフト共重合体の多糖溶媒に対する溶解性

抄録

ST/amylose graft product which had been prepared using ceric ammonium nitrate as initiator and from which homo polystyrene had been almost completely removed by tetrahydrofuran extraction was re-extracted with 10% NaOH aq. solution to yield a transparent extract solution. UV spectrum determined for the extract showed the absorption intrinsic to phenyl group. ST/cellulose graft product which had been prepared from gel cellulose by the same procedures as described above was subjected to the extraction with 85% phosphoric acid to give a transparent extract solution. The UV spectroscopy on the extract solution indicated the presence of phenyl group in the solution.
Molecular weights of the graft polystyrene chains separated from the extracts by means of complete hydrolysis of polysaccharide chains were far smaller than those of trunk polymers.
It may be concluded that polysaccharide graft copolymers whose graft polymer chains are far smaller than trunk polymers in molecular weight dissolve in the good solvents for the trunk polymers, under suitable conditions.