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Reactive Blending of Thermoplastic Starch and Polyethylene-Graft-Maleic Anhydride With Chitosan as Compatibilizer

Reactive Blending of Thermoplastic Starch and Polyethylene-Graft-Maleic Anhydride With Chitosan as Compatibilizer

Kittisak Jantanasakulwong, Noppol Leksawasdi, Phisit Seesuriyachan, Somchai Wongsuriyasak, Charin Techapun, Toshiaki Ougizawa

Carbohydr Polym. 2016 Nov 20;153:89-95.

PMID: 27561475

Abstract:

Cassava starch was melt-blended with glycerol (70/30wt%/wt%) at 140°C to prepare thermoplastic starch (TPS). Chitosan (CTS) was premixed with starch and glycerol, in acidified water (lactic acid 2wt%), at 1, 5 and 10wt%/wt%. TPS/CTS was then melt-blended (160°C) with polyethylene-graft-maleic anhydride (PE-MAH). Phase determination and scanning electron microscopy indicated TPS/PE-MAH/CTS had a co-continuous morphology and CTS-induced phase inversion to give dispersed PE-MAH particles in a TPS matrix. Tensile strength at break and elongation, melt viscosity, fracture toughness and water contact angle of TPS/PE-MAH were improved by CTS incorporation. TPS/PE-MAH/CTS blends decreased the melting temperature of TPS and PE-MAH compared to the neat polymers. FTIR confirmed a reaction had occurred between amino groups (NH2) of CTS and the MAH groups of PE-MAH. This reaction and the enhanced miscibility between TPS and CTS improved the mechanical properties of the TPS/PE-MAH/CTS blend, particularly at 5wt%/wt% CTS.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP9006262-B	Polyethylene-graft-maleic anhydride		9006-26-2	Price

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