Patent ID: 11859038
Assignee: ZHEN DING TECHNOLOGY CO., LTD.
Field: Macromolecular chemistry, polymers (Chemistry)
Classification: CPC C | IPC C

Claim 0:
1. A method for manufacturing a block copolymer of polyamide acid comprising:
providing first dianhydride monomers and second dianhydride monomers, wherein each first dianhydride monomer is p-phenylene bis(trimellitate) dianhydride; each second dianhydride monomer is 4,4′-(4,4′-isopropylidenediphenoxybis(phthalic anhydride);
providing first diamine monomers and second diamine monomer, wherein each first diamine monomer is 4-aminophenyl-4-aminobenzoate; each second diamine monomer is 4,4′-(4,4′-isopropylidenediphenyl-1,1′-diyldioxy)dianiline;
mixing and polymerizing the first dianhydride monomers and the second diamine monomers to form a first polyamide acid, and mixing and polymerizing the second dianhydride monomers and the first diamine monomers to form a second polyamide acid;
undergoing a polymerization reaction between the first polyamide acid and the second polyamide acid to obtain the block copolymer of polyamide acid;
wherein the first dianhydride monomers and the second diamine monomers are mixed in a molar ratio of 9:10 to 11:10.