The present disclosure relates to cross-linked polyelectrolytes comprising polyelectrolyte, and composite materials comprising said cross-linked polyelectrolytes. The present disclosure further relates to membrane electrode assemblies comprising the cross-linked polyelectrolytes and composites of the disclosure, and electrochemical devices comprising the disclosed membrane electrode assemblies.

A process to produce a polyolefin reactive telechelic pre-polymer comprising reacting alkyl-cis-cyclooctene and optionally cis-cyclooctene, in the presence of a difunctional chain transfer agent under ring opening metathesis polymerization conditions to form an unsaturated polyolefin reactive telechelic pre-polymer is provided. Further provided are unsaturated and hydrogenated reactive pre-polymers, crosslinked elastomers and high molecular weight elastomers.

A dicarbamate telechelic unsaturated polyolefin pre-polymer comprising a reaction product of reacting alkyl-cis-cyclooctene and optionally cis-cyclooctene, in the presence of a multifunctional chain transfer agent possessing two or more amino groups wherein the two or more amino groups are protected by one or more protecting groups under ring opening metathesis polymerization conditions is provided.

A process to produce a polyolefin reactive telechelic pre-polymer comprising reacting alkyl-c/5-cyclooctene and optionally czs-cyclooctene, in the presence of a multifunctional chain transfer agent possessing two or more amino groups wherein the two or more amino groups are protected by one or more protecting groups under ring opening metathesis polymerization conditions to form a dicarbamate telechelic unsaturated polyolefm pre-polymer is provided.

The invention relates to a hydrocarbon polymer comprising two exo-vinylene cyclic carbonate terminal groups, of formula (1), production method thereof and use of same for the production of coating, mastic and adhesive compositions.

1) Hydrocarbon-based polymer of formula (I):

##STR00001## in which F.sup.1 and F.sup.2 have the respective formulae (IIa) and (IIb) or (IIa) and (IIb):

##STR00002## a process for its preparation, and use as an adhesive.

F.sup.1 is formula (IIa) and F.sup.2 is formula (IIb):

##STR00001## g and d are 0, 1, 2 or 3; R.sup.14 and R.sup.15 are C.sub.1-C.sub.4 or a cyclohexyl radical; R.sup.1 to R.sup.12 represents hydrogen or alkyl with 1 to 22 carbon atoms; x and y are integers, x+y is 0 to 2; R.sup.13 is oxygen or sulphur or divalent CH.sub.2 n1, n2, m, p1 and p2 are an integer or equal to 0 and such that the molecular weight Mn of the polymer of formula (I) is between 400 and 100 000 g/mol; a process for preparation of the polymer; and use as adhesive in mixture with an amino compound with at least two amine groups.

##STR00002##

Described herein are compositions having an eight-membered monocyclic unsaturated hydrocarbon, methods and system to separate the eight-membered monocyclic unsaturated hydrocarbon from a hydrocarbon mixture including additional nonlinear unsaturated C.sub.8H.sub.2m hydrocarbons with 4m8, by contacting the hydrocarbon mixture with a 10-ring pore molecular sieve having a sieving channel with a 10-ring sieving aperture with a minimum crystallographic free diameter greater than 3 and a ratio of the maximum crystallographic free diameter to the minimum crystallographic free diameter between 1 and 2, the molecular sieve having a T1/T2 ratio 20:1 wherein T1 is an element independently selected from Si and Ge, and T2 is an element independently selected from Al, B and Ga, the 10-ring pore molecular sieve further having a counterion selected from NH.sub.4.sup.+, Li.sup.+, Na.sup.+, K.sup.+ and Ca.sup.++.

This invention relates generally to olefin metathesis catalyst compounds, to the preparation of such compounds, and the use of such catalysts in the metathesis of olefins and olefin compounds, more particularly, in the use of such catalysts in (E)-selective olefin metathesis reactions. The invention has utility in the fields of catalysis, organic synthesis, polymer chemistry, and industrial and fine chemicals chemistry.

Described herein are compositions having an eight-membered monocyclic unsaturated hydrocarbon, methods and system to separate the eight-membered monocyclic unsaturated hydrocarbon from a hydrocarbon mixture including additional nonlinear unsaturated C.sub.8H.sub.2m hydrocarbons with 4m8, by contacting the hydrocarbon mixture with a 10-ring pore molecular sieve having a sieving channel with a 10-ring sieving aperture with a minimum crystallographic free diameter greater than 3 and a ratio of the maximum crystallographic free diameter to the minimum crystallographic free diameter between 1 and 2, the molecular sieve having a T1/T2 ratio20:1 wherein T1 is an element independently selected from Si and Ge, and T2 is an element independently selected from Al, B and Ga, the 10-ring pore molecular sieve further having a counterion selected from NH.sub.4.sup.+, Li.sup.+, Na.sup.+, K.sup.+ and Ca.sup.++.