Comb macromolecule is a macromolecule comprising a main chain with multiple trifunctional branch points from each of which a linear side-chain emanates. Network is a highly ramified macromolecule in which essentially all constitutional units are connected to all other constitutional units and to the macroscopic phase boundary by many permanent paths through the macromolecule. In a covalent network all the permanent paths are formed by covalent bonds. In a physical network , some of the bonds are formed by physical interactions. A micronetwork contains cyclic structures and of colloidal dimensions.
Polymer blend is a macroscopically homogeneous mixture of two or more different species of polymer.
Hanser, Munich, 1990.