Based on the bond-fluctuation lattice model and dynamic Monte Carlo simulation

with explicitly including the hydrophobic interaction between water molecular and polymer

the kinetic process for the coil-globule transition of a homopolymer chain was studied.The distribution of collapse time observed the Gaussian profile

and the variation of averaged collapse time on the quench depth was similar with that for protein folding

but exhibited no local minima.What’s more

the averaged collapse time was exponentially dependent on the chainlength.In the kinetic process

the polymer chain’s conformation was found to evolve from an ellipsoid-like random coil to necklace-like conformation

then to sausage-like conformation

and eventually to a spherical globule.The four-stage kinetic process previously proposed by other peoples has been distinctly defined in this paper via some characteristic parameters

i.e.

the number of cluster

cluster size and aspherity

thus providing a convenient criterion for stage partition and comparison for specific collapse process.