A SPECTROSCOPIC AND QUANTITATIVE CHARACTERIZATION OF VARIOUS FRACTIONS OF THE HETEROGENEOUS POLYMER SYSTEM (EPDM-G-MALEIC ANHYDRIDE)-G-POLYAMIDE-66 USING HIGH-RESOLUTION C-13 SOLID-STATE NMR AND IR TECHNIQUES

The structure of EPDM grafted onto polyamide 66 has been analyzed with high resolution solid state C-13 NMR and IR spectroscopy. Details abo ut the EPDM rubber include the amount of rubber incorporated in this b lend, the sequence analysis of the EPDM rubber and an estimate of the type and amount of termonomer used (in this case only trans 1.4-hexadi ene). The sample contains 20% EPDM rubber, 6% polyamide 66 grafted ont o EPDM rubber and 74% neat polyamide 66. Some evidence has been obtain ed via IR spectroscopy for the presence of cyclic imide groups, derive d from grafted maleic anhydride groupings. No evidence for the use of a coupling agent could be obtained from either the C-13 SPE-MAS spectr a of the interphase enhanced polyamide 66 or from the isolated rubber phase.