With the increasing of NIPAm content, the sodium salicylate loading and leasing ratio of P(NIPAm-co-AAm) gels increased, while those of PAAc/P(NIPAm-co-AAm) decreased.

• PAAc/P(NIPAm-co-AAm)凝胶对水杨酸钠的载药率减小,释药率减小。