Open AccessPoly(L-lactic acid)/deproteinized natural rubber blends with enhanced compatibility
Author(s) -
I Putu Mahendra,
Phan Trung Nghia,
Nguyen Thi Hong Phuong,
Tring Thi Hang,
Nur Fazreen Alias,
H. Ismail
Publication year - 2021
Publication title -
polimery
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.295
H-Index - 26
ISSN - 0032-2725
DOI - 10.14314/polimery.2021.2.3
Subject(s) - materials science , natural rubber , compatibility (geochemistry) , maleic anhydride , scanning electron microscope , composite material , lactic acid , polylactic acid , polymer chemistry , chemical engineering , copolymer , polymer , engineering , bacteria , biology , genetics
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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