Nonuniformities of distributions of molecular weights of grafted polymers

0376314 - ÚMCH 2013 RIV US eng J - Journal Article
Dušek, Karel - Netopilík, Miloš - Kratochvíl, Pavel
Nonuniformities of distributions of molecular weights of grafted polymers.
Macromolecules. Roč. 45, č. 7 (2012), s. 3240-3246. ISSN 0024-9297. E-ISSN 1520-5835
R&D Projects: GA ČR GCP205/11/J043
EU Projects: European Commission(XE) 238700 - NANOPOLY
Institutional research plan: CEZ:AV0Z40500505
Institutional support: RVO:61389013
Keywords : polymer * graft * backbone
Subject RIV: CD - Macromolecular Chemistry
Impact factor: 5.521, year: 2012

The nonuniformities of graft (co)polymers have been analyzed using the probability generating functions and their moments. The nonuniformity is described by ratios of averages of molecular weights of the graft (co)polymers. The general feature of the nonuniformity of graft (co)polymers is that, with increasing degree of grafting and degree of polymerization of the backbone, the nonuniformity of a graft (co)polymer passes through a maximum and approaches more or less closely the nonuniformity of the backbone (co)polymer. The nonuniformities of graft (co)polymer are independent of the type of the degree of-polymerization distribution. The nonuniformity depends markedly on the disparity in the molecular weights of monomer units of the backbone copolymer and the grafts if the graft copolymer has a small number of grafts per backbone.
Permanent Link: http://hdl.handle.net/11104/0006952