An embodiment of the present invention provides a thermosetting composition with a photo-alignment property, including a copolymer containing a photo-alignment constitutional unit represented by the following formula (1) and a thermal cross-linking constitutional unit. In the formula (1), X represents a photo-alignment group causing a photo-isomerization reaction or a photo-dimerization reaction, L.sup.1 represents a single bond, O, S, COO, COS, CO, OCO, OCO(CH.sub.2).sub.nCOO, OCOCH.sub.2CH.sub.2OCH.sub.2CH.sub.2COO, OCOC.sub.6H.sub.4O, OCOC.sub.6H.sub.10O, COO(CH.sub.2).sub.nO, COOC.sub.6H.sub.4O, COOC.sub.6H.sub.10O, O(CH.sub.2).sub.nO, OC.sub.6H.sub.4O, OC.sub.6H.sub.10O, or (CH.sub.2).sub.nO, n represents 1 to 4, R.sup.1 represents a hydrogen atom or a monovalent organic group, and k represents 1 to 5. ##STR00001##

Crosslinkable random copolymers comprising atom transfer radical polymerization (ATRP) initiators and crosslinked copolymer films formed from the copolymers are provided. The random copolymers, which are polymerized from one or more alkyl halide functional inimers and one or more monomers having a crosslinkable functionality, are characterized by pendant ATRP initiating groups and pendant crosslinkable groups.

Crosslinkable random copolymers comprising atom transfer radical polymerization (ATRP) initiators and crosslinked copolymer films formed from the copolymers are provided. The random copolymers, which are polymerized from one or more alkyl halide functional inimers and one or more monomers having a crosslinkable functionality, are characterized by pendant ATRP initiating groups and pendant crosslinkable groups.

An elastomer composition can comprise a C.sub.4 to C.sub.7 isoolefin; a non-halogenated alkylstyrene; a halogenated alkylstyrene; and optionally a diolefin, wherein the C.sub.4 to C.sub.7 isoolefin is not the same as the diolefin. Optionally, the elastomer composition can be blended with a butyl rubber and/or a halobutyl rubber. Such blends that also comprise additives may be suitable for producing tire components such as innerliners.

An elastomeric composition is provided that includes from 1 to 100 parts by weight per hundred parts by weight rubber (phr) of a first propylene--olefin-diene (PEDM) terpolymer comprising 70 wt % to 92.5 wt % propylene, 7.5 wt % to 30 wt % a C2 or C4-C12 -olefin, and 3.5 wt % to 20 wt % diene, said wt % based on the weight of the PEDM terpolymer. The PEDM terpolymer V may have a Mooney viscosity (ML(1+4)) of 25 MU to 100 MU. The composition may further include from 0 to 99 phr of an ethylene-based copolymer comprising 40 wt % to 95 wt % ethylene.