; Yang Juhua] Acad Sinica, Inst High Energy Phys, Beijing 100080, Peoples R China
; [Ye Meiling
; Zhang Yingjiu
; Shi Lianghe] Acad Sinica, Inst Chem, Beijing 100080, Peoples R China
The positron lifetime technique has been used to study the temperature behavior of micelle in solution of polystyrene-polydimethylsiloxane diblock copolymer in n-heptane. The results indicate that positron annihilation parameters are found to be sensitive to structural and microphase changes taking place in the micellar solutions. The abrupt changes in the o-P-H. lifetime and intensity observed at certain temperature appear to be associated with variations in the aggregation state of the copolymer molecules in solutions. Above the critical micelle temperature the o-P-s lifetime increases sharply with increasing temperature. This behavior indicates the process of disintegration of molecular aggregtes to free copolymer molecules.
Xiong XM,Yang JH,Xiong, XM,et al. Study of Temperature Effect of Micellar Solutions of PSDMS Block Copolymer in n-Heptane by Positron Annihilation[J]. ACTA PHYSICO-CHIMICA SINICA,1995,11(6):541-546.
熊兴民.,杨巨华.,Xiong, XM.,Yang, JH.,Ye, ML.,...&Shi, LH.(1995).Study of Temperature Effect of Micellar Solutions of PSDMS Block Copolymer in n-Heptane by Positron Annihilation.ACTA PHYSICO-CHIMICA SINICA,11(6),541-546.
熊兴民,et al."Study of Temperature Effect of Micellar Solutions of PSDMS Block Copolymer in n-Heptane by Positron Annihilation".ACTA PHYSICO-CHIMICA SINICA 11.6(1995):541-546.