通常以黏数和对数黏数在无限稀释时的外推值作为溶液黏度的量度，用[η]表示，这个外推值即为特性黏数。 特性黏数的值与浓度无关，其因次是浓度的倒数。
探讨了单体浓度、反应温度、引发剂用量等因素对聚合反应速率和产物特性黏数的影响。
The effects of monomer concentration, reaction temperature, initiator dosage on polymerization rate and intrinsic viscosity of product were investigated.
由CPAM沉降煤泥水的絮凝试验可知，CPAM的特性黏数，阳离子度以及药剂用量对煤泥水的絮凝效果都有很大影响。
As can be seen from flocculation test of CPAM on coal slurry, intrinsic viscosity number, cation degree and medical dosage of CP AM have obvious effect on flocculating performance.
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