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The anhydride content of some commercial PP‐ g ‐MA: FTIR and titration
Author(s) -
Sclavons M.,
Carlier V.,
De Roover B.,
Franquinet P.,
Devaux J.,
Legras R.
Publication year - 1996
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/(sici)1097-4628(19961121)62:8<1205::aid-app10>3.0.co;2-6
Subject(s) - maleic anhydride , succinic anhydride , grafting , polymer chemistry , polypropylene , monomer , fourier transform infrared spectroscopy , chemistry , materials science , polymer , organic chemistry , chemical engineering , copolymer , engineering
Abstract A set of anhydride‐grafted polypropylenes was collected from various companies. They were studied in light of our recent results on polypropylene melt grafted with maleic an‐hydride. 1 This work confirmed that an important decrease of the anhydride content is recorded on heating or washing, due to the elimination of free, ungrafted products, re‐spectively, by sublimation of maleic anhydride and by polymaleic anhydride solubilization. The deconvolution of the infrared spectra of washed anhydride‐grafted polypropylenes (PP‐ g ‐MA) revealed two types of grafted anhydride: succinic anhydride form and polymaleic anhydride form. All in all, four forms of anhydride functions were detected: two grafted and two free, each being either on monomeric or polymeric forms. Nevertheless, one PP‐ g ‐MA (Hercoprime) can be distinguished by its very high grafting level. This polymer is therefore discussed in more detail. Finally, all the present results are discussed with regard to the principal applications of the PP‐ g ‐MA as a blend compatiblizer or as an adhesion promoter. © 1996 John Wiley & Sons, Inc.