Synthesis and characterization of new aromatic polyesters containing cardo decahydronaphthalene groups

Poly(ether ether ketone)s and poly(ether ether ketone ketone)s containing cardo decahydronaphthalene groups: Synthesis and characterization

“…The dimethyl substitution leads to an asymmetric segment which can result in less efficient chain packing and hence more free volume that led to relatively easier chain mobility of polymer segments in comparison with symmetrical substituted and unsubstituted PEEKs and PEEKKs, ultimately leading to decrease in T g . A similar observation was reported for polyesters in our previous work 20 and also it has been reported previously for polyarylates, polysulfones, polycarbonates, etc.…”

“…In our previous work, we reported the synthesis and characterization of polyesters containing cardo decahydronaphthalene groups with enhanced solubility and glass transition temperature. 20 In continuation of our work on processable high performance polymers, we wish to report herein synthesis of new PEEKs and PEEKKs by polycondensation of the three bisphenols, viz. 0 -(octahydro-2(1H)-naphthylidene)-bis-3,5-dimethylphenol (DM-NBP) were synthesized as described in our previous work.…”

“…0 -(octahydro-2(1H)-naphthylidene)-bis-3,5-dimethylphenol (DM-NBP) were synthesized as described in our previous work. 20 4,4 0 -Difluorobenzophenone and 1,3-bis(4-fluorobenzoyl)benzene (Aldrich) were recrystallized from toluene before use. Anhydrous potassium carbonate (S.D.…”

Processable aromatic polyesters based on bisphenol derived from cashew nut shell liquid: synthesis and characterization

“…[5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21] These approaches work by forcing the chains apart and lend to the improved solubility and better processability.…”

Effect of polydimethylsiloxane incorporation on the properties of polyimides synthesized from newly designed α,α'-bis(2-aminophenoxy)-p-xylene

“…good oxidative and thermal stability, high glass transition temperature, excellent mechanical properties, good adhesion along with chemical, wear, fire and radiation resistance for diverse range of applications including aerospace, automotive and microelectronic industries, as films, adhesives, sealants, coatings, insulators, gas separation membranes etc. In this regard, large number of polymeric materials such as polyamides, polyimides, poly(amide-imide)s polybenzimidazoles, polyethers, polyketones, polysulphones, and polyesters have been developed in order to replace metal, ceramic or glass and reduce the cost of present day industrial processes [1][2][3][4][5][6][7]. Polyimides especially aromatic polyimides have attracted the attention of scientists and engineers more than any other polymer as they have great potential to serve this purpose due to favorable combination of aforementioned sought properties [8].…”