Fig. 1

Molecular design of transparent polyimide with high thermal stability"

Fig. 2

The intra- and inter-molecular charge transfer of polyimides"

Fig. 3

Monomers with trifluoromethyl groups[26??-29]"

Fig. 4

Monomers with alicyclic structures[30?-32]"

Fig. 5

Monomers with noncoplanar structures[42?-44]"

Fig. 6

Monomers with bulky pendent groups[36-37]"

Fig. 7

Synthesis of PI-POSS nanocomposite films[38]"

Fig. 8

Synthesis of PI hybrid[39]"

Table 1

Comparison of the Tg of MD simulation and experiment K"

Table 2

Comparison of the CTE of MD simulation and experiment ($10^{-4}$K$^{-1}$)"

Fig. 9

Dimension change with respect to the temperature of two kinds of PIs[50]"

Fig. 10

The chemical structure of three kinds of polyimides[54]"

Table 3

Yield strains and stresses of the polyimides"

Fig. 11

QSPR models for polymers based on machine learning"

Fig. 12

Prediction model of organic ploymer properties based on SVM algorithm"

Fig. 13

Comparison of predicted, experimental, and DFT computed values[71]"

Fig. 14

PF-MLP for predicting the dielectric loss of PI nanocomposite films[75]"

Fig. 15

Comparison between real values and predicted values of the SGBS mode[76]"

Table 4

Comparisons of models prediction performance[76]"

Fig. 16

Comparison of predicted and true values[77-78]"