Lewis acid-base pair catalytic initiator and application thereof

An application of a Lewis acid-base pair catalytic initiator in a preparation of an epoxide homopolymer,

• wherein the Lewis acid-base pair catalytic initiator comprises a Lewis acid and a Lewis base, the Lewis acid having a structural general formula as shown in formula (I) and the Lewis base having a structural general formula as shown in formula (II);
• wherein:
• the A is selected from element Boron or element Aluminum;
• the R1, R2, R3, R4 are independently selected from alkyl, alkoxy, aryl or halogen groups;
• the alkyl or alkoxy have a carbon number being equal to or greater than 1 to equal to or less than 16;
• the aryl contains substituents with the number being equal to or less than 5, the substituents being selected from methyl, methoxy or halogen;
• n is selected from an integer from 1 to 16;
• wherein a molar ratio of the Lewis acid to the Lewis base is from 0.125:1 to 8:1.

An application of a Lewis acid-base pair catalytic initiator in a preparation of an epoxide copolymer,

• wherein the Lewis acid-base pair catalytic initiator comprises a Lewis acid and a Lewis base, the Lewis acid having a structural general formula as shown in formula (I) and the Lewis base having a structural general formula as shown in formula (II);
• wherein:
• the A is selected from element Boron or element Aluminum;
• the R1, R2, R3, R4 are independently selected from alkyl, alkoxy, aryl or halogen groups;
• the alkyl or alkoxy have a carbon number being equal to or greater than 1 to equal to or less than 16;
• the aryl contains substituents with the number being equal to or less than 5, the substituents being selected from methyl, methoxy or halogen;
• n is selected from an integer from 1 to 16;
• wherein a molar ratio of the Lewis acid to the Lewis base is from 0.125:1 to 8:1.