TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preparation (Claimed): Preparation (I) comprises adding 2-30C alkene with substituted 4,4'-methylenebis(2-allylphenol) compounds of formula (VI) to give (I). Preferred Components: (I) is substituted 4-(1-(4-hydroxyphenyl)-1-methylethyl)phenol compounds of formula (II). The 2-30C alkene comprises at least one of 1-octene, 1-dodecene, 1-octadecene or 1-eicosene.    TECHNOLOGY FOCUS - POLYMERS - Preferred Method: The step of adding 2-30C alkene is performed in the presence of a radical polymerization initiator. The method of preparing sulfonated polyarylene sulfone further comprises adding bisphenol-based compounds of formula (IX), and the polymerization is performed at 100-190 degrees C. The sulfonated polyarylene sulfone is mixed with clay to form a clay-sulfonated polyarylene sulfone nanocomposite. Preferred Components: The degree of the polymerization of the sulfonated polyarylene sulfone is 5-3500. The sulfonated polyarylene sulfone is a repeating unit i.e. substituted sodium 2-(4-(2-(4-hydroxyphenyl)propan-2-yl)phenoxy)-5-(4-(4-(2-(4-(4-(phenylsulfonyl)phenoxy)phenyl)propan-2-yl)benzyl)-3-sulfinatophenylsulfonyl)benzenesulfinate compounds of formula (V). The sulfonated polyarylene sulfone is a polymer comprising repeating units i.e. substituted 4-(2-(4-(4-(phenylsulfonyl)phenoxy)phenyl)propan-2-yl)phenol compounds of formula (Vb) and substituted sodium 2-(4-(2-(4-hydroxyphenyl)propan-2-yl)phenoxy)-5-(3-sulfinatophenylsulfonyl)benzenesulfinate compounds of formula (Vc). The sulfonated polyarylene sulfone: is a cross-linked sulfonated polyarylene sulfone; has a degree of sulfonation of 10-50%; and further comprises at least one repeating unit comprising a third repeating unit i.e. substituted 4-(4-(4-benzenesulfonyl-phenoxy)-benzyl)-phenol compounds of formula (IIIa) and a fourth repeating unit i.e. substituted 4-(4-(2-hydrosulfonyl-4-(3-hydrosulfonylphenylsulfonyl)phenoxy)benzyl)phenol compounds of formula (IVa). The radical polymerization initiator comprises azobisisobutyronitrile and benzyl peroxide. The electrolyte membrane further comprises clay and sulfonated polyarylene sulfone nanocomposite.A1 = (CH2)aCH3;a = 4-22; andt, u = 0.01-0.99. EXAMPLE - 1-Octene (2 moles) was mixed with diallyl bisphenol A (1 mole), then azobisisobutyronitrile (2 moles) and N-methylpyrrolidone were added to the reaction mixture. The reaction mixture was reacted for 24 hours to give 4,4'-(propan-2,2-diyl)bis(2-(oct-7-enyl)phenol).