A polymer comprising monomers selected from the group consisting of monomer of formula A wherein X is the number of monomer A units in the polymer wherein the monomer units are consecutive or nonconsecutive and wherein X is from 6 to 100; monomer of formula B wherein Y is the number of monomer B units in the polymer wherein the monomer units are consecutive or nonconsecutive and wherein Y is from 0 to 99; and monomer of formula C wherein Z is the number of monomer C units in the polymer wherein the monomer units are consecutive or nonconsecutive and wherein Z is from 0 to 99; wherein R1 to R6 independently is hydrogen, an alkyl, a polyethyleneglycol, an aryl, a heteroaryl group, or a biological substrate conjugated via a linker (L-BS); wherein SG1 to SG6 independently is an alkyl, a hydrophilic functional group or a L-BS; and wherein the polymer includes end groups HG1 and HG2 wherein HG1 and HG2 independently is a hydrogen, an alkyl, a halogen, a boronyl, an aryl, a heteroaryl group or a L-BS; wherein the ratio of X to Y+Z is > 1, wherein the sum of X+Y+Z is > 10; wherein monomer unit B and monomer unit C are different; and wherein BS is an antibody, a peptide, a protein, an oligonucleotide, a nucleic acid or a carbohydrate; wherein the linker comprises an alkyl, a PEG, a carboxamide, a thioether, an ester, an imine, a hydrazine, an oxime, an alkyl amine, an ether, an aryl amine, a boronate ester, an N-acylurea or anhydride, a platinum complex, an aminotriazine, a triazinyl ether, an amidine, a urea, a urethane, a thiourea, a phosphite ester, a silyl ether, a sulfonamides, a sulfonate ester, a 1,2,3-triazole, a pyradazine, a thiazolidine, a 2-diphenylphosphonyl-benzoamide, an isoxazole or a succinimide group; wherein an alkyl is a straight- or branched- chain saturated hydrocarbyl substituent containing 1 to 15 carbon atoms; wherein an aryl is an aromatic cycloakyl containing 3 to 8 carbon ring atoms; wherein an heteroaryl is an aryl wherein at least one of the ring atoms is a heteroatom. wherein Z is the number of monomer C units in the polymer wherein the monomer units are consecutive or nonconsecutive and wherein Z is from 0 to 99; wherein R1 to R6 independently is hydrogen, an alkyl, a polyethyleneglycol, an aryl, a heteroaryl group, or a biological substrate conjugated via a linker (L-BS); wherein SG1 to SG6 independently is an alkyl, a hydrophilic functional group or a L-BS; and wherein the polymer includes end groups HG1 and HG2 wherein HG1 and HG2 independently is a hydrogen, an alkyl, a halogen, a boronyl, an aryl, a heteroaryl group or a L-BS; wherein the ratio of X to Y+Z is > 1, wherein the sum of X+Y+Z is > 10; wherein monomer unit B and monomer unit C are different; and wherein BS is an antibody, a peptide, a protein, an oligonucleotide, a nucleic acid or a carbohydrate; wherein the linker comprises an alkyl, a PEG, a carboxamide, a thioether, an ester, an imine, a hydrazine, an oxime, an alkyl amine, an ether, an aryl amine, a boronate ester, an N-acylurea or anhydride, a platinum complex, an aminotriazine, a triazinyl ether, an amidine, a urea, a urethane, a thiourea, a phosphite ester, a silyl ether, a sulfonamides, a sulfonate ester, a 1,2,3-triazole, a pyradazine, a thiazolidine, a 2-diphenylphosphonyl-benzoamide, an isoxazole or a succinimide group; wherein an alkyl is a straight- or branched- chain saturated hydrocarbyl substituent containing 1 to 15 carbon atoms; wherein an aryl is an aromatic cycloakyl containing 3 to 8 carbon ring atoms; wherein an heteroaryl is an aryl wherein at least one of the ring atoms is a heteroatom.