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Effect of Maleic‐Anhydride Grafting on the Physical and Mechanical Properties of Poly( L ‐lactic acid)/Starch Blends
Author(s) -
Hwang Sung Wook,
Shim Jin Kie,
Selke Susan,
SotoValdez Herlinda,
Rubino Maria,
Auras Rafael
Publication year - 2013
Publication title -
macromolecular materials and engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.913
H-Index - 96
eISSN - 1439-2054
pISSN - 1438-7492
DOI - 10.1002/mame.201200111
Subject(s) - starch , materials science , maleic anhydride , compatibilization , crystallinity , thermal stability , grafting , thermal decomposition , chemical engineering , dynamic mechanical analysis , polymer blend , composite material , polymer chemistry , copolymer , organic chemistry , polymer , chemistry , engineering
MA is grafted onto both PLLA and starch in an internal mixer in the presence of DCP in a one‐step reactive compatibilization process. The effect of maleation of MA on the physical and mechanical properties and morphology of the blends was assessed. The onset decomposition temperature of the PLLA/starch blends decreased as the starch content increases due to the lower thermal stability of starch and the low effect of the maleation reaction on the thermal stability of the blends. PLLA/starch blends without grafted MA showed higher crystallinity as the starch content increased. Reactive compatibilized blends with less than 20 wt% starch had higher storage modulus, indicating that the compatibility between the two phases was improved.