Poly(styrene-N‐isopropylmethacrylamide‐methacrylic acid) [P(SNM)CS] colloidal particles were synthesized by two-step precipitation polymerization in aqueous system. Silver ions loaded into P(SNM)CS network were reduced by using NaBH₄ as a reductant to obtain the aqueous dispersion of Ag-P(SNM)CS hybrid particles. Various techniques including transmission electron microscopy (TEM), dynamic light scattering (DLS), UV–Visible (UV–Vis), Fourier transform infrared (FTIR) and thermogravimetric analysis (TGA) were used to characterize P(SNM)CS and Ag-P(SNM)CS systems. Silver nanoparticles have excellent stability in P(SNM)CS system even on their storage for months. Reduction of 4-nitrophenol (4Nph) was chosen as an exemplary reaction to examine the catalytic ability of newly synthesized Ag-P(SNM)CS hybrid microgels under different reaction conditions. Reaction progress was inspected by spectrophotometric method. The value of observed rate constant (k_obs) was measured as a dependent of contents of Ag-P(SNM)CS, reductant and substrate using pseudo first order kinetic modeling to explore mechanism of catalysis by Ag-P(SNM)CS.

聚（苯乙烯-N-异丙基甲基丙烯酰胺-甲基丙烯酸）[P（SNM）CS]胶体颗粒是通过两步沉淀聚合在水性体系中合成的。通过使用NaBH ₄减少了加载到P（SNM）CS网络中的银离子作为还原剂以获得Ag-P（SNM）CS杂化颗粒的水分散体。各种技术包括透射电子显微镜（TEM），动态光散射（DLS），紫外-可见（UV-Vis），傅立叶变换红外（FTIR）和热重分析（TGA）用来表征P（SNM）CS和Ag- P（SNM）CS系统。银纳米颗粒在P（SNM）CS系统中即使保存数月也具有出色的稳定性。选择还原4-硝基苯酚（4Nph）作为示例性反应，以检查新合成的Ag-P（SNM）CS杂化微凝胶在不同反应条件下的催化能力。通过分光光度法检查反应进程。观测速率常数的值（k _obs通过使用伪一级动力学模型来探索Ag-P（SNM）CS催化机理的方法，测定γ-氨基苯甲酸与Ag-P（SNM）CS，还原剂和底物的含量之间的关系。