Published : 2021-02-17

Poly(L-lactic acid)/deproteinized natural rubber blends with enhanced compatibility

Abstract

PLLA-g-LMWNR (LMWNR – low molecular weight natural rubber) was used as a compatibilizer (1–3 wt %) of poly(L-lactic acid)/deproteinized natural rubber (PLLA/DPNR) blend (95/5 w/w). The LMWNR was prepared using TiO2/ZnO (9 : 1 w/w) and H2O2 as co-catalyst. The obtained LMWNR was grafted with 0–12 wt % maleic anhydride (LMWNR-g-MA) and then with PLLA (PLLA-g-LMWNR). A significant improvement in the mechanical properties of the PLLA/DPNR blend was found in the blend that contained 3 wt % PLLA-g-LMWNR. Scanning electron microscopy showed a decrease in the pore diameter from 5.44 to 1.56 μm. The thermal analysis of PLLA/DPNR blends showed that the Tg value of PLLA phase shifted from 63.1 to 61.4°C. These results confirmed that PLLA-g-LMWNR can enhance the compatibility of the PLLA/DPNR blend.



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Mahendra, I. P., Nghia, P. T. ., Phuong, N. T. H., Hang, T. T., Alias, N. F., & Ismail, H. (2021). Poly(L-lactic acid)/deproteinized natural rubber blends with enhanced compatibility. Polimery, 66(2), 105–111. https://doi.org/10.14314/polimery.2021.2.3