采用水溶液聚合法制备了低分子量聚丙烯酸钾（PAAK），并作为新型消焰剂加入单基发射药中。通过火焰原子吸收光谱法测试了PAAK中钾的含量；用乌氏黏度计测定了特性黏度；采用DSC法研究不同pH值的PAAK与硝化棉（NC）的相容性；利用充氮氧弹法对添加PAAK、硝酸钾KNO₃、硫酸钾K₂SO₄的单基发射药的燃烧残渣进行了对比研究。结果表明，合成的PAAK中，钾的质量分数为15.21%，相对分子量在3 000左右，有利于和NC均匀混合，且在中性或微碱性（pH＝7.0~7.5）的情况与NC相容性良好。与传统的KNO₃、K₂SO₄消焰剂相比，PAAK能够和NC均匀混合，制备均质透明的单基发射药；PAAK发射药的燃烧残渣最少，占发射药质量的0.18%。

Potassium polyacrylate (PAAK) with the low molecular weight was synthesized by aqueous solution polymerization, and it was used as an organic flame suppressant to prepare single-based propellant. Potassium content in PAAK was tested by a flame atomic absorption spectrometry, and intrinsic viscosity was measured by a Ubbelohde viscometer. Compatibility of PAAK with nitrocellulose (NC) was investigated by DSC method, and combustion residues of single-based propellant containing PAAK, KNO₃ or K₂SO₄ were compared by nitrogen-bomb method. The results show that mass fraction of potassium in PAAK is 15.21%, and the molecular weight is about 3 000, which is beneficial to mix with NC uniformly. It has a good compatibility with NC in neutral or slightly alkaline (pH=7.0-7.5). Compared with single-based propellant containing KNO₃ or K₂SO₄, the single-based propellant containing PAAK is homogeneous and transparent due to PAAK being evenly mixed NC. Combustion residue of PAAK propellant is the least, accounting for 0.18% of the mass of propellant.