This papcr presents the effect of different initiators and solvents on the anionic polymerization of tert-butyl-vinylketone．An amorphous polymer was obtained with softening point at 140—180°when the title monomer was polyrmerized with n-butyl lithium as anionic initiator in a homogenous phase with pyridine or tetrahydrofuran as solvent，while that in a heterogenous phase such as benzene，toluene，xylene or n-heptane it would give crystalline and probably isotactic polymer with melting point between 260—280℃．The crystalline form showed the characteristic bands at 1 100 cm-1 and 1330 cm-1．which were both absent in those of the amorphous form．A series of IR spectra were obtained from mixture of crystalline polymer with various amounts of amorphous form．It was found that bands of 1100 cm-1

1290 cm-1

and 1330 cm-1 would weaken gradually as the content of crystalline form dropped below 87％，and the spectra would be actually identical with those of the amorphous one of the crystalline part dropped below 14％． Alkali metals as Li．Na，K as well as their organometallic com-pounds as NaH，LiAlH4，RoNa，ROK，RMgX and diphenylketone-Na were also able to initiate heterogenous polymerization．