含苯环结构的温敏聚合物溶液温敏行为研究

STUDY OF TEMPERATURE-SENSITIVE BEHAVIOR OF TEMPERATURE-SENSITIVE POLYMER SOLUTION CONTAINING BENZENE RING STRUCTURE

以实验室合成的含有苯环结构的温敏聚合物P(AM-co-DEAM-co-nBS)和P(AM-co-DEAM-co-oBS)为研究对象,采用温控型紫外分光光度计考察了温度、亲、疏单体组分、NaCl和CaCl_2含量、表面活性剂浓度对聚合物溶液相转变温度(LCST)的影响。结果表明:P(AM-co-DEAM-co-oBS)和P(AM-co-DEAM-co-nBS)的LCST分别为45℃和65℃;增加聚合物结构中疏水基含量(摩尔比0.3-1.5)和增加无机盐NaCl和CaCl2浓度可降低其LCST(下降5~10℃);增加聚合物亲水基含量和增加阴离子表面活性剂浓度可提高其LCST(增加5~8℃)。

（AM-co-DEAM-co-nBS）and P（AM-co-DEAM-co-oBS）synthesized in laboratory were used as the research objects,and temperature-controlled ultraviolet spectrophotometry The influence of temperature,affinity,hydrophobic monomer,NaCl and CaCl2 content and surfactant concentration on the LCST of the polymer solution was studied by photometer.The results showed that the LCST of P（AM-co-DEAM-co-oBS）and P（AM-co-DEAM-co-nBS）were 45 ℃ and 65 ℃,respectively;the hydrophobic group content The increase of the hydrophilic group content and the increase of the anionic surfactant concentration can increase the LCST（increase of 5-8 ℃）and the decrease of the LCST（5-10 ℃）。