a group of polymers (either homopolymers or copolymers) with different number-average molecular weights or different compositions resulting from different ratios of monomer units. The difference in the number-average molecular weight or in the composition is determined not by unintentional process-related fluctuations but by deliberate alterations to the process conditions, the process itself remaining the same., homo- või kopolümeeride rühm, kus üksikud polümeerid erinevad keskmise molekulmassi või erinevate monomeerühikute vahekorra poolest