IR spectra for LNR, LENR and LENRA are shown in FIGURE 1 for comparison. There are many frequent peaks
that shared by all the natural rubbers especially in the finger print region. Difference from LNR, LENR had been
exposed to UV ray shows the main features of ENR in the presence of epoxy group with absorption peak at 905,
1067 and 1378 for asymmetric stretch C-O, C-O stretch and symmetric C-O respectively [13,15]. For LENRA, the
This article is copyrighted as indicated in the article. Reuse of AIP content is subject to the terms absorption peak at 1066 cm-1 and 1182 cm-1 belonged to the C-O stretch and asymmetric stretch C-O-C for acrylate
group respectively.