The diol ester compound was used as a new-type internal electron donor forZiegler-Natta (Z-N) catalyst system recently.

Calculation of the synthesis of polyester glycol;

Firstly,different chain polyester glycol were prepared from different component diols and adipic acid.

In home, due to the shortage of polyester glycol, one of raw materials of prepar.

Direct determination for free propylene glycol content in propylene glycol ester;

Activity,hydrogen response,stereospecificity and kinetic behavior of catalysts with 1,3-diol dibenzoate as internal donor for propylene polymerization were studied.

At atmospheric pressure and slurry propylene polymerization conditions, effect of polymerization temperature on kinetic behavior of propylene polymerization with BCND catalyst using 1,3-diol dibenzoate as internal donors was investigated, and was compared with three kinds of conventional industrial Ziegler-Natta catalyst with phthalate as internal donors.

The thermal stability of the ester-type ECDP, using the polyester diol as the fourth component, was studied by means of TGA method and was compared withthat of the ether-type ECDP, using the polyether diol as the fourth component.