In order to physically elucidates the anomalous intrinsic viscosity of dendrimers

first

the radial segmental density profile of dendrimers is calculated by the self-consistent mean field method.Secondly

based on the two-zone model proposed

the intrinsic viscosity as a function of generation of dendrimers with the following parameters

including the number of generations

the functionality of the core

the length of spacer

the effective coefficient of correlation and the excluded volume is systematically investigated.Thirdly

the origin of dendrimers'anomalous intrinsic viscosity is elucidated in the microscopic scale

namely the competition of the number fraction between the two kinds of monomers without the capability of dragging solvent

which is caused by the increase of volume of the core and the back-folding ability caused by entropy effect.Finally

it is physically elucidated that the nature of the intrinsic viscosity is the reflection of the ability per monomer of dendrimer to averagely drag solvent molecules alone rather than the reflection of the degree of polymerization.This research will be benefit for the optimum design of dendrimer materials in the corresponding application areas.