Compatibilization of starch/poly(butylene adipate‐co‐terephthalate) blown films using itaconic acid and sodium hypophosphite

Abstract

Itaconic acid (IA) has potential as a compatibilizing agent in polymeric blends due to its unique chemical characteristics. Sodium hypophosphite (SHP) has been studied as a catalyst in esterifying reactions using multicarboxylic acids. Starch/poly(butylene adipate‐co‐terephthalate) blown films containing IA, with and without SHP, were produced. The film containing IA presented higher tensile strength (8.166 MPa) and elongation (891.473%) than the control film (5.548 MPa and 487.637%, respectively). When SHP was added (sample IA‐SHP), tensile strength increased even more (9.215 MPa); however, elongation (636.821%) was lower than in the IA film. This behavior was attributed to crosslinking between two starch itaconoate molecules intermediated by SHP. The increase in the compatibility between the polymeric phases justified the lower permeability to water vapor of the IA‐SHP films and was responsible for the production of films with a more compact and homogeneous structure. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 46629.

Development of thermoplastic starch/poly(butylene adipate‐co‐terephthalate) biobased active packaging films and potential usage in the food industry

“…In addition, the presence of grape seed oil in the matrix helps the TPS and PBAT polymer matrices to mix homogeneously with each other, thus increasing the strength of the composite material. Studies have shown that because of the hydrophobic nature of PBAT, the heterogeneous appearance issue in TPS/PBAT blends is also observed 25,26 . However, using molecules that act as compatibilizers between two different phases is considered an advantage.…”

Synthesis and characterization of a polycarboxylate superplasticizer modified by sodium hypophosphite

“…The H P H of SHP could react with >C═C< of unsaturated carboxylic acid and the phophinate group could be introduced into the product's structure. [25][26][27][28][29] However, the usage of SHP to synthesize PCE is scarcely reported and it is promising to explore this method in the preparation of PCE.…”

“…Sodium hypophosphite (SHP) is a common industrial chemical and widely used as a hypophosphite group‐containing reactant in the fields of cotton garments and circulating water system. The HPH of SHP could react with >C═C< of unsaturated carboxylic acid and the phophinate group could be introduced into the product's structure 25–29 . However, the usage of SHP to synthesize PCE is scarcely reported and it is promising to explore this method in the preparation of PCE.…”

Biodegradability assessment of starch/glycerol foam and poly(butylene adipate-co-terephthalate)/starch film by respirometric tests

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