Ethylene-propylene copolymer, INEPT

Application of the INEPT Method to °C NMR Spectral Assignments in Low-Density Polyethylene and Ethylene-Propylene Copolymer... 

Carbon 13 NMR spectra of low density-polyethylene and ethylene propylene copolymer were observed at a freqeuncy of 125.77 MHz. The INEPT method was applied to identify methyl, methylene, and methine carbons. 

Figure 4. C INEPT spectrum with the delay time of A=3/4J(a) and the common spectrum(b) for the ethylene-propylene copolymer.

For example, the INEPT technique has been applied to low-density polyethylene and ethylene-propylene copolymers [48]. The results of the C-INEPT experiment at 125.77 MHz for the methine and methylene regions are shown in Fig. 6.18. 

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