New spirodilactam polymers

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

“…Many approaches have been tried toward the improvement of solubility and processability of PEEKs and PEEKKs which include the incorporation of noncoplanar structures, [10][11][12] pendent groups, and the alternation of the order and ratio of ether-ketone linkages 13,14 as well as meta and para-phenyl substitution. 15 The incorporation of cardo groups such as 9,9-diarylfluorene, 16 acenaphthenequinone, 17 spirodilactam, 18 phthalein, 19 and xanthene 19 into the backbone of poly(arylene ether ketone)s is an attractive approach toward enhanced solubility and glass transition temperature. In our previous work, we reported the synthesis and characterization of polyesters containing cardo decahydronaphthalene groups with enhanced solubility and glass transition temperature.…”

Poly(arylene ether nitrile)s

“…10 In general, polymers containing the spirodilactam structure in the backbone have a good thermal stability and comparatively high glass transition temperatures. 23 The polymers are soluble in many organic solvents and form clear and flexible films. 23 The polymers are soluble in many organic solvents and form clear and flexible films.…”

Synthesis and characterization of soluble copoly(arylene ether ketone sulfone)s bearing xanthene moiety in the main chain

“…To overcome these limitations, various structural modification of the polymer backbone has been tried toward the improvement of solubility and processability of PEKs. These approaches include the alteration of the order and ratio of ether–ketone linkages 4 as well as the ratio of meta and para phenyl unit, 5 the insertion of flexible thioether 6 and CR 2 7 groups, the introduction of pendent groups such as methyl, 8 trifluoromethyl, 9 t -butyl, 10 phenyl, 11 trifluorophenyl, 12,13 pyridyl, 14 naphthyl, 15 and bulky cardo groups such as fluorene, 16 acenaphthenequinone, 17 spirodilactam, 18 phthalide, 19 and decahydronaphthalene, 20 as well as the incorporation of unsymmetrical or noncoplanar structure. 21 –24 Among them, the introduction of sulfone groups into the PEK chain to give poly(arylene ether ketone sulfone) (PEKS) could be another important way to induce significant variations of properties.…”