YAN WANGA, LI-FANG ZHANGA,B,C,*, XIAO-QI WANGB
Journal of Polymer Materials, Vol.37, No.1-2, pp. 77-89, 2020, DOI:10.32381/JPM.2020.37.1-2.6
Abstract The effect of 18-crown-6 ether (18C6) on the anionic polymerization of ε-caprolactone (ε -CL)
using potassium tert-butoxide (t-BuOK) as the initiator was studied. The experimental results
showed that 18C6 in combination with t-BuOK exhibited high selectivity for ring opening relative
to trans-esterification and improved control toward the ROP of ε-CL, producing poly(ε-
caprolactone) (PCL) with much higher molecular weight and relatively narrow distribution compared
to those using t-BuOK alone as the initiator.The influences of reaction conditions, such as
monomer concentration, monomer/initiator molar ratio, and [18C6]/[t-BuOK] molar ratio, as well
as reaction temperature and time on the polymerization have been examined… More >
Login
Register
