采用不同引发体系引发温敏性聚（N-乙烯己内酰胺）（PVCL）与海藻酸钠（SA）的接枝聚合反应,其中偶氮二异丁腈（AIBN）做引发剂时接枝效果最好。在AIBN作引发剂情况下,考察了引发剂浓度、反应时间以及原料配比等因素对接枝率（G）及单体接枝效率（GE）的影响,结果表明,当AIBN浓度为6×10-3mol/L,反应时间为5h,原料配比m（VCL）∶m（SA）为2∶1时,接枝效率达到最大。利用红外光谱技术以及热重分析对接枝共聚物的结构进行了表征。浊度研究表明,接枝共聚物具有较好的温敏性。
Different initiators were used to initiate the grafting polymerization of sodium alginate （SA） and temperature-responsive poly（N-vinylcaprolactam）（PVCL）. When AIBN was taken as an initiator, the grafting（G） and grafting efficiency（GE） obtain the maximum, and the influences of reaction conditions on degree of G and GE have been studied. The results show that when C（I） is 6 × 10^-3 mol/L, t is 5h, m （VCL） ： m （SA） is 2：1 the GE of the monomer obtains the maximum. The chemical structure of prepared SA-graft-PVCL （SA-g-PVCL） was verified by infrared spectrometry （FT-IR） and TG analysis. Turbidity study reveals that grafted sodium alginates have good temperature-sensitivity.
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