Hydrocarbon-based polymer bearing an alkoxysilane end group, said hydrocarbon-based polymer being of formula: in which: - each carbon-carbon bond of the chain noted as is a double bond or a single bond, in accordance with the valency rules of organic chemistry; - the groups R1, R2, R3, R4 and R5 are each, independently of the other groups or otherwise, a hydrogen, a halo group, an alkoxycarbonyl group or an alkyl group, the groups R1 to R6 possibly being linked together as members of the same saturated or unsaturated ring or heterocycle (i.e. including at least one carbon-carbon double bond, including aromatic rings), - R6 is, independently of the other groups R1, R2, R3, R4 and R5 or otherwise, a halo group, an alkoxycarbonyl group or an alkyl group, - m and p are integers each within a range from 0 to 5, preferably from 0 to 2, and even more preferably m and p are both equal to 1, the sum m + p itself being within a range from 0 to 10, preferably from 0 to 6, - R and R', which may be identical or different, each represent a linear or branched, preferably linear, alkyl group including from 1 to 4 and preferably from 1 to 2 carbon atoms, - Z is a divalent group chosen from alkylene groups, optionally interrupted with an ester function, and including from 1 to 22 and preferably from 1 to 6 carbon atoms, - q is an integer equal to 0 or 1, - r is an integer equal to 0, 1 or 2, and - n is an integer such that the number-average molar mass Mn of the hydrocarbon-based polymer of formula is within a range from 400 to 50 000 g/mol, preferably from 600 to 20 000 g/mol, and the polydispersity index of the hydrocarbon-based polymer of formula is within a range from 1.0 to 2.0 and preferably from 1.25 to 1.55. - each carbon-carbon bond of the chain noted as is a double bond or a single bond, in accordance with the valency rules of organic chemistry; - the groups R1, R2, R3, R4 and R5 are each, independently of the other groups or otherwise, a hydrogen, a halo group, an alkoxycarbonyl group or an alkyl group, the groups R1 to R6 possibly being linked together as members of the same saturated or unsaturated ring or heterocycle (i.e. including at least one carbon-carbon double bond, including aromatic rings), - R6 is, independently of the other groups R1, R2, R3, R4 and R5 or otherwise, a halo group, an alkoxycarbonyl group or an alkyl group, - m and p are integers each within a range from 0 to 5, preferably from 0 to 2, and even more preferably m and p are both equal to 1, the sum m + p itself being within a range from 0 to 10, preferably from 0 to 6, - R and R', which may be identical or different, each represent a linear or branched, preferably linear, alkyl group including from 1 to 4 and preferably from 1 to 2 carbon atoms, - Z is a divalent group chosen from alkylene groups, optionally interrupted with an ester function, and including from 1 to 22 and preferably from 1 to 6 carbon atoms, - q is an integer equal to 0 or 1, - r is an integer equal to 0, 1 or 2, and - n is an integer such that the number-average molar mass Mn of the hydrocarbon-based polymer of formula is within a range from 400 to 50 000 g/mol, preferably from 600 to 20 000 g/mol, and the polydispersity index of the hydrocarbon-based polymer of formula is within a range from 1.0 to 2.0 and preferably from 1.25 to 1.55.