Advances in Chemistry / 2014 / Article / Tab 2

Research Article

Synthesis and Characterization of Novel Processable and Flexible Polyimides Containing 3,6-Di(4-carboxyphenyl)pyromellitic Dianhydride

Table 2

Solubility and inherent viscosity of polyimides (PI-1–PI-6).

PolyimideDMSODMAcDMFTHFm-cresolH2SO4ηinn (dL/g)

PI-1++++++++0.68
PI-2++++++++0.98
PI-3+++++++++++1.01
PI-4+++++++++0.72
PI-5++++++++++0.94
PI-6++++++++++1.04

+++ = soluble at room temperature, ++ = soluble on heating, + = slightly soluble on heating, − = insoluble.