Synthesis and characterization of a polyimide containing phenolphthalein groups

Miao Cai Guo, Song Nain Li, Xiao Gong Wang, Gang Liu, Xiao Su Yi

Research output: Journal PublicationArticlepeer-review

7 Citations (Scopus)


A polyimide containing phthalein groups and hydroxyl side-groups was synthesized. In the synthesis, a new diamine monomer containing phenolphthalein group was prepared by nitrification of phenolphthalein and followed with further reduction. The polyimide was obtained by polycondensation of the diamine monomer with 4, 4'-hexafluoroisopropylidinedi (phtalic anhydride) (6FDA) and subsequent high temperature imidization step. The chemical structure of the monomer and polyimide was characterized by 1H-NMR and FTIR. GPC test gives the molecular weight (M n) and polydispersity of the polyimide of 15500 and 2. 47, respectively. The polyimide shows no obvious T in the range of 100 ∼ 350°C and a T d of 388°C with 2. 5% mass loss by thermal analysis (DSC and TGA). The polymer has good solubility in some aprotic polar organic solvents such as DMF, DMAc, etc. but is insoluble in weak polar organic solvents such as toluene. The UV-Vis transmittance and absorbance spectra show that the polyimide possesses good optically transparency in the visible region. For its aromatic hydroxyl side-groups containing structure, the polyimide can be further used as a precursor of high performance functional materials.

Original languageEnglish
Pages (from-to)278-283
Number of pages6
JournalActa Polymerica Sinica
Issue number3
Publication statusPublished - Mar 2012
Externally publishedYes


  • High transparency
  • Phenolphthalein
  • Polyimide
  • Thermo stability

ASJC Scopus subject areas

  • Chemistry (all)
  • Chemical Engineering (all)
  • Polymers and Plastics


Dive into the research topics of 'Synthesis and characterization of a polyimide containing phenolphthalein groups'. Together they form a unique fingerprint.

Cite this