研究了在均相体系中通过共辐射接枝法将ＮＩＰＡＡｍ 接枝到ＰＶＡ上。测定了不同因素如剂量，剂量率及酸度对接枝率的影响。采用冷冻熔融的方法制备了ＰＶＡ，ＰＶＡｇＮＩＰＡＡｍ 凝胶，发现ＰＶＡｇＮＩＰＡＡｍ 凝胶具有温度敏感性，用相同方法对ＭＢ包埋固定并研究了不同温度下缓释规律。 The grafting of NIPAAm onto PVA was studied by means of co-irradiation grafting in a homogeneous system. The effects of different factors such as dose, dose rate and acidity on the grafting rate were determined. PVA and PVANNIPAAm gels were prepared by freezing-thawing method. It was found that PVAgNIPAAm gels were temperaturesensitive. The same method was used to immobilize MB and study the sustainedrelease rules at different temperatures.