Journal
POLYMER COMPOSITES
Volume 42, Issue 3, Pages 1325-1337Publisher
WILEY
DOI: 10.1002/pc.25903
Keywords
composites; hydrophobic starch; mechanical properties; modification; structure‐ property relations
Categories
Funding
- Ministry of Education, Science, and Technological Development of the Republic of Serbia [451-03-68/2020-14/200287, 451-03-68/2020-14/200135]
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This study modified starch using natural-based plasticizers/modifiers and MAPP to improve compatibility and reinforcement in the synthesis of composite materials, thus enhancing the mechanical properties and water stability of starch composites.
As a renewable resource, starch is considered to be fully biodegradable and nonpolluting to the environment but the hygroscopicity of starch is the main disadvantage for wider applicability in the production of a polymer-based material. Hydrophobically modified starch prepared using natural-based plasticizers/modifiers in a first step ([-]-diisopropyl D-tartrate [DiPT], ricinoleic acid [RA] and epoxidized soybean oil [ESO]), and maleated polypropylene (MAPP) in a second step contributed to better compatibility, and thus reinforcing of composites. Tailored processing conditions, structural/morphological properties, hydrophobicity, and water-resistance of the modified starch were established. In addition, the Charpy impact and tensile strength of composites, based on poly(ethylene-co-acrylic acid) (EAA) and modified starches, were determined. Increased tensile strength and Young modulus of the composite using starch-modified with DiPT-MAPP, that is, 3 and 83%, respectively, indicated the possible applicability of obtained materials.
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