作　　者： ; ; ;

机构地区： 中国科学技术大学化学与材料科学学院化学物理系

出　　处： 《高分子通报》 2005年第4期82-88,共7页

摘　　要： 总结了作者有关高分子折叠和聚集方面的工作。最初,作者研究了聚(N-异丙基丙烯酰胺)(PNIPAM)均聚物的折叠或叫做“线团-塌缩球的转变”,然后研究了含有疏水和亲水基团的PNIPAM共聚物的折叠。作者研究了疏水作用和亲水作用对折叠的影响,发现了融化球,有序线团等折叠过程中的中间态。另一方面,作者研究了两亲性高分子在水中的聚集与稳定。作者的结果表明,如果高分子链所形成的稳定聚集体为核-壳结构,则每个亲水基团所占有的面积为一个常数。如聚集体不是核-壳结构,即部分亲水基团分布在聚集体内部,则上述关系不再成立。随亲水基团含量的增加,聚集体将由球状变为超枝化结构。 This review summarizes our work on folding and aggregation of polymer chains in water. We started with the folding or coil-to-globule transition of linear poly（N-isopropylacrylamide） （PNIPAM） homopolymer chains in water, and then studied the folding of hydrophilically or hydrophobically modified PNIPAM copolymer chains. The roles of hydrophobic and hydrophilic interactions in the folding were investigated. The intermediates in the folding process, i.e., the molten globular state and the “ordered-coil” state between the random-coil and compacted globular states were observed. On the other hand, the aggregation and stabilization of amphiphilic polymer chains in water were also studied. Our results revealed that if the polymer chains form aggregates with a core-shell structure, the surface area occupied per hydrophilic moiety is a constant. Such a relation does not hold when some hydrophilic moieties are buried inside the aggregates, and the aggregates would develop into hyperbranched clusters as the amount of hydrophilic moieties increases.

关 键 词： 高分子 折叠反应 聚集反应 共聚物 疏水作用 亲水作用 超枝化结构

领　　域： [理学] [理学]