Abstract: A biodegradable super-absorbent was prepared from copolymer of acrylic acid(AA) with sodium polymannuronate(SPM). The effects of the amount of SPM and initiator, neutralization degree(D_n) of AA, reaction temperature(T) on absorbency and biodegradability of the copolymer were studied. When W_SPM＝1.5%，W_KPS＝0.15%，D_n=65%，T=70℃, the absorbency of the superabsorbent was 812 g•g^-1 for pure water and 79 g•g^-1 for normal saline.The super-absorbent could be degraded by soil and specific microbes, the degradation degree was up to 17.36% within 60 days.

摘要： 用过硫酸钾(KPS)作引发剂、通过水溶液聚合法制得了可生物降解的聚丙烯酸盐/海藻酸钠高吸水性树脂.研究了海藻酸钠(SPM)及引发剂用量、丙烯酸（AA）中和度(D_n)、聚合反应温度(T)等因素对树脂吸水率的影响以及树脂的生物降解性能.当海藻酸钠的质量分数W_SPM为1.5%，过硫酸钾的质量分数W_KPS为0.15%，中和度为65%，反应温度为70℃时，共聚物蒸馏水的吸水率为812 g•g^-1，生理盐水的吸水率为79 g•g^-1，且能被土壤和特定微生物降解，在土壤中60 d的降解率达17.36%.