TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Agent: The peroxide curing agent comprises 2,5-dimethyl-2,5-di-(tert-butylperoxy)hexyne-3, di-tert-butyl peroxide, 2,5-dimethyl-2, 5-di(tert-butylperoxy)hexane, tert-butyl cumyl peroxide, di-(2-tert-butylperoxy isopropyl)benzene, dicumyl peroxide, butyl 4,4-di-(tert-butylperoxy) valerate, 1,1-di-(tert-butylperoxy)-3,3,5-trimethylcyclohexane, tert-butyl peroxybenzoate, tert-butyl peroxy 3,5,5-trimethylhexanoate, dibenzyl peroxide, di(4-methylbenzoyl) peroxide, di-2,4-dichlorobenzoyl peroxide or their mixture.    TECHNOLOGY FOCUS - POLYMERS - Preferred Component: The isomonoolefin comprises isobutene. The multiolefin comprises isoprene. The thermoplastic component comprises polypropylene, polyethylene, polystyrene, acrylonitrile-butadiene-styrene (ABS), allyl resin, ethylene vinyl alcohol, fluoroplastic, polyacetal, polyacrylate, polyacrylonitrile, polyamide, polyimide, polycarbonate, polyester, polyethylene oxide, polypropylene oxide, polyethylene glycol, polypropylene glycol, polyvinylidene chloride or their mixture. Preferred Composition: The non-halogenated elastomer comprises 5 mol% or more, preferably 7.5 mol% or more of repeating units derived from at least one 4-7C multiolefin monomer. The amount of non-halogenated elastomer is 20-80 wt.% of thermoplastic vulcanizate. Preferred Property: A molded article obtained using the vulcanizate is recyclable at least three times with a loss in initial tensile strength of less than 55% and a loss in initial ultimate elongation of less than 55%. Preferred Method: The thermoplastic component and non-halogenated elastomer are mixed together with thermally activated peroxide curing agent at 100 degrees C or more in an extruder under conditions which enables melting of the thermoplastic component and elastomer, and dispersing elastomer in thermoplastic component to form thermoplastic vulcanizate. The peroxide curing agent is added to the molten thermoplastic component and elastomer in the extruder. The temperature of the molten thermoplastic component and elastomer in the extruder after addition of the peroxide curing agent is 130 degrees C or more.