Poly Aryl Ether Ketone Based Blends

4 Poly(Aryl Ether Ketone) Based Blends 

PAR blends with PEEK are phase separated, but exhibit synergistic impact strength in the range of 0-60 wt% PEEK, with maximum values in both notched impact strength and tensile impact strength at 50 wt% PEEK as noted in Fig. 4.11 [461]. The Tg data showed a limited increase in the PEEK phase Tg, but a significant decrease in the PAR-rich phase Tg indicating 

Flgure4.11 Synergistic impact strength behavior of PEEK/PAR blends(reproducedfrom Harris,J.E.and Robeson, L. M., in Contemporary Topics in Poiymer Science, Voi.6, Multiphase Macromolecuiar Systems, Cuibertson, B. M. (Ed.) (1989) Plenum Press, New York with kind permission of Springer Science and Business Media) 

Sulfonation of PEEK (19.2 wt%) resulted in misdbihty with PA6, as observed from Tg and FTIR characterization [479]. The Zn + salt showed a higher level of interaction than the Li+ salt, which in turn showed improved interaction with PA6 over the free acid. Hydrogen bonding was ascribed to the specific interaction of the free acid and PA6. For the salts, ion-dipole interaction was ascribed to a complex of Li+ with the amide carbonyl and Zn with the amide nitrogen. 

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The acid-base Nafion composite membranes include blends of Nafion with polypyrrole (PPy) [98-104], polybenzimidazole (PBI) [105-107], poly (propyleneoxide) (PPO) [108, 109], polyfurfuryl alcohol (PFA) [110], poly(vinyl alcohol) (PVA) [111-115], sulfonated phenol-formaldehyde (sPF) [116], polyvinylidene fluoride (PVdF) [117-122], poly(p-phenylene vinylene) (PPV) [123], poly(vinyl pyrrolidone) (PVP) [124] polyanifine (PANI) [125-128], polyethylene (PE) [129], poly(ethylene-terephtalate) [130], sulfated p-cyclodextrin (sCD) [131], sulfonated poly(ether ether ketone) (sPEEK) [132-135], sulfonated poly(aryl ether ketone) (sPAEK) [136], poly(arylene ether sulfone) (PAES) [137], poly(vinylimidazole) (PVl) [138], poly(vinyl pyridine) (PVPy) [139], poly (tetrafluoroethylene) (PTFE) [140-142], poly(fluorinated ethylene-propylene) [143], sulfonated polyhedral oligomeric silsesquioxane (sPOSS) [144], poly (3,4-ethylenedioxythiophene) (PEDT) [145, 146], polyrotaxanes (PR) [147], purple membrane [148], sulfonated polystyrene (PSSA) [149, 150], polystyrene-b-poly(ethylene-ran-butylene)-bpolystyrene (SEES) [151], poly(2-acrylamido-2-methyl-l-propanesulphonic acid-co-l,6-hexanediol propoxylate diacrylate-co-ethyl methacrylate) (AMPS) [152], and chitosan [31]. A binary PVA/chitosan [153] and a ternary Nafion composite with PVA, polyimide (PI) and 8-trimethoxy silylpropyl glycerin ether-1,3,6-pyrenetrisulfonic acid (TSPS) has also been reported [154]. 

Other polymers which have been the subject of thermal degradation studies include ethylene-vinyl acetate [29, 66, 67], ethylene-vinyl alcohol [68], poly(aryl-ether ketone) [69], poly-2-vinyl-naphthalene-co-methyl maleate [34], polyphenylenes based on diethyl-benzophenone [70], polyglycollide [71-73], poly(a-methylstyrene tricarbonyl chromium [74], polytetrahydrofuran [75], polylactide [76-78], poly(vinyl) cyclohexane [79], styrene-vinyl cyclohexane [80], isopropenylacetate-maleic dianhydride [80], polyethylene glycol containing a 1,3-disubstituted phenolic group [81], poly-2-vinyl naphthalene-co-methacrylate [34], collagen biopolymers [82], chitin graft poly (2-methyl-oxazoline - polyvinyl chloride blends [83], cellulose [32, 83-88] and side-chain cholestric elastomers [89, 90]. 

C. Zhao, Z. Wang, D. Bi, H. Lin, K. Shao, T. Fu, S. Zhong, and H. Na Blend membranes based on disulfonated poly(aryl ether ether ketone)s (SPEEK) and poly(amide imide) (PAI) for direct methanol fuel cell usages. Polymer, 48(11) 3090-3097, May 2007. 

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