Abstract
Abstract In this work, low density polyethylene (LDPE)/plasticized starch (TPS) blends were prepared. The TPS employed in this study was obtained by plasticization of tapioca starch with a hyperbranched polyester polyol. Differential scanning calorimetry analysis showed that the melting temperature increased with the TPS content. The opposite effect was exhibited in the crystallization temperature and additional changes were not observed during the heating. X-ray diffraction analysis showed a reduction in intensity of the peak at Bragg’s angle 17.5°, proving a diminution on A type crystallinity with the increasing amount of LDPE. Micrographs obtained by scanning electron microscopy exhibited starch granules without destructure. TPS acted as a filler to LDPE, since the mechanical properties (Young’s modulus and tensile strength) improved ostensibly. The Young’ modulus and tensile strength decreased with the amount of LDPE, however, the elongation at break exhibited an opposite behavior.
Highlights
IntroductionStarch is a natural carbohydrate accumulated by green
Starch is a natural carbohydrate accumulated by greenBlends of recycled low density polyethylene (LDPE) with starch would have two plants in the form of granules
Using hyperbranched polyester polyols (HBP) as a plasticizer for tapioca starch makes an important contribution to the study of LDPE/TPS blends
Summary
Starch is a natural carbohydrate accumulated by green. Blends of recycled LDPE with starch would have two plants in the form of granules. It is composed of linear environmental advantages: the substitute of the virgin synthetic polysaccharide molecules (amylose) and branched molecules thermoplastic matrix by post-consumer materials, and the (amylopectin)[1]. The starch plasticization has spurred end products that would be biodegradable and cheap[14]. LDPE/starch blends have been prepared from a dispersion a great importance as substrate due to wide availability, its low cost and its renewable character[2]. The main plasticizer employed in the plasticization process of starch is glycerol[3], but several other compounds such as urea[4], ethanolamine[4] and sorbitol[5] have been employed
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