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无臭无味。溶于水，不溶于苯和乙醚。汲湿性极强。是一种同时具有亲水和疏水基团的高分子化合物。能缓慢溶于水形成极黏稠的透明液体。0.5%溶液的粘度约为1 Pa·s，其粘度与CMC大体相等，是海藻酸钠的15～20倍。加热处理、中性盐类、有机酸类均对其粘度影响很小，碱性条件下则粘度增大。不溶于乙醇、丙酮等有机溶剂。强热至300℃不分解。久存粘度变化极小，不易腐败。遇二价以上的金属离子(如铝、铅、铁、钙、镁、锌)形成其不溶性盐，引起分子交联而凝胶化沉淀。pH值在4以下时，聚丙烯酸产生沉淀。增稠剂。由于在水中溶解较慢，可预先与砂糖、粉末淀粉糖浆、乳化剂等混合，以提高溶解速度。作糖液、盐水、饮料等的澄清剂（高分子凝聚剂）。水产加工石回收废水中蛋白质；及净化废水。 Scale inhibitor, builder in detergents, aid in soap and detergent processing and control of water hardness.

Specs ⸢ View details ⸥

Chinese name

聚丙烯酸钠(PAAS)

English name

Sodium polyacrylate(PAAS)

Chinese alias

English alias

CAS number

9003-04-7

molecular formula

(C3H3NaO2)n

molecular weight

94.040 g/mol

Exact mass

45% 水溶液，Mw≈ 4500

PSA

40.100 Å²

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