Synthesis of stretchable polyetherimides containing multiple alkyl side chains

The effects of long and bulky aromatic pendent groups with flexible linkages on the thermal, mechanical and electrical properties of the polyimides and their nanocomposites with functionalized silica

“…Here, the elongation is less compared to that in our previously published work in which one long aromatic pendent group is present. 27 In 2007 Wang et al 8 reported that poly etherimides with multiple alkyl side chains (number of CH 2 groups in each chain varies from 5 to 18) showed very high elongation at break (200–470%). Tensile strength of those polyimides was found to be low.…”

“…Conventional polyimides show very poor solubility in low boiling organic solvents. But Wang et al in 2007 8 showed that the polyetherimides with multiple alkyl side chains exhibit very good solubility in low boiling chlorinated solvents and in all high boiling solvents. Recent studies show that polyimides with aromatic pendent groups along with flexible linkages have improved solubility.…”

“…Amutha et al reported that the bulky poly cyclic aryl group like anthracene in the side chain can impart elevated T g and good thermal and mechanical properties with better solubility in the organic solvents. 6,7 Wang et al 8 reported that the inclusion of long and bulky multiple alkyl side chains impart excellent solubility, toughness, flexibility and good elongation even above 200% i.e. stretchability or elastomeric properties can be imparted in the polyimides but with inferior thermal and mechanical properties.…”

A Chiroptical Study of Chiral Λ- and X- Type Oligothiophenes Toward Modelling the Interchain Interactions of Chiral Conjugated Polymers

“…1 [17] , 5 [18] , 6 [19] , 8 [20] , 10 [21] , 11 [22] , 12 [23] , 13 [24] , 15 [25] , 18 [26] , 20 [27] and 24 [28] were synthesized according to the literature procedures.…”

Synthesis and characterization of flexible/stretchable polyimide having long/bulky aryl pendent group and polyimide/silicon dioxide nanocomposites.

“…Our already reported works show that if the polymer chain includes hetero aromatic rings like pyridine , triazole , quinoline , in the main chain, thermal stability will be very high. Inclusion of long and bulky multiple alkyl side chains impart extra solubility, toughness, flexibility, and good elongation even above 200%, that is, elastomeric properties in the polyimides but with inferior thermal and mechanical properties . But bulky aryl groups in the main and side chains can retain the good thermal stability and mechanical strength .…”