Study on Coil-Globule Transition of Polymer Measured by Luminescent Probe Method

(1)聚合物盘绕-微球相变的理论研究(A)在物理和化学作用力作用下，聚合物盘绕-微球相变的内部塌陷过程可分为五种类型。(A)van der Waals力(B)饱和化学键(C)链段与溶剂之间的亲和力(D)库仑力(E)拓扑相互作用(B)从理论上发现聚合物诱导的线团-微球转变在添加聚合物的重叠浓度之前就开始了。(C)通过计算机模拟从理论上阐明了不同温度下微球聚合物中密度分布的特征。(2)聚合物标记发色团的合成(3)POE诱导聚苯乙烯的卷曲-微球转变(A)测量了POE的体积分数与平均表观旋转弛豫时间的关系。很明显，在55-60%POE时，蒽基的表观平均转动弛豫时间急剧增加。(B)测量了POE的体积分数与自猝灭速率的关系。聚苯乙烯在50%POE时发生卷曲-球状转变。

(1) Theoritical Study on Coil-Globule Transition of Polymer(A) The inner collapsed processes of the coil-globule transition of polymer are classified as five type with the physical and chemical forces. (a)van der Waals force (b)saturating chemical bonds (c)affinity between segment and solvent (d)Coulomb force (e)topological interaction(B) It is found out theoritically that the polymer-induced coil-globule transition begin before the overlap concentration of added polymer.(C) The characteristics of density distribution in globule polymer at various temperatures are theoritical clarified by a computer simulation.(2) Synthesis of Polymer labeled chromophores(3) POE-Induced Coil-Globule Transition of Polystyrene(A) The dependence of volume fraction of POE on the apparent mean rotational relaxation time of anthryl groups attached polymer is measured. It is clear that the apparent mean rotational relaxation time of the anthryl group sharply increases at 55-60%POE.(B) The dependence of volume fraction of POE on the rate of self-quenching is measured. The coil-globule transition of polystyrene is caused at 50%POE.