MECHANICAL AND THERMAL PROPERTIES OF LDPE/GLUCURONOXYLAN BLENDS

摘要

The great application of polysaccharides, especially starch, cellulose, xylans and their derivatives in the polymers field are as a component in polymer blends. Most of the applications are focused on polyethylene, which is widely used as packaging material. This work deals with blends preparation low density polyethylene and glucuronoxylan laurate (LaCOLX) with DS= 1.9 in four different amounts (1, 3, 5 and 10 wt.%) with and without compatibilizer EAA in three different amounts: 10, 25 and 50 wt.% in respect of polysaccharide. The compatibility of the prepared blends LDPE/LaCOLX has been studied using light microscopy. The presence of filler LaCOLX and the effect of compatibilizer have been studied through the mechanical properties (tensile strength, elongation at break and Young's Modulus) of blends. The prepared blends of LDPE/LaCOLX containing 25 wt.% and 50 wt.% of EAA have showed the good mechanical properties. Increasing amount of LaCOLX and presence of compatibilizer had positive effect on thermal stability of LDPE/LaCOLX blends.