Glycol based plasticisers for salt modified starch

Abbott, Andrew P.; Abolibda, Tariq Z.; Davis, Stefan J.; Emmerling, Franziska; Lourdin, Denis; Leroy, Éric; Wise, William R.

doi:10.1039/c4ra06220e

Cited by 30 publications

(18 citation statements)

References 16 publications

(19 reference statements)

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“…However, not only the selected blend partner is decisive for the properties of TPS‐based blends, but also the processing conditions. Extrusion temperature and residence time were found critical for the physical properties of salt‐modified TPS . The effect of the applied shear stress during processing is also a very important factor.…”

Section: Introductionmentioning

confidence: 99%

“…Extrusion temperature and residence time were found critical for the physical properties of salt-modified TPS. 21 The effect of the applied shear stress during processing is also a very important factor. Smaller size of the starch particles was observed for TPS/polycaprolactone (PCL) injection molded specimens as compared to film blowing due to lower shear stresses in the latter case.…”

Section: Introductionmentioning

confidence: 99%

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Influence of processing on the mechanical properties and morphology of starch‐based blends for film applications

Lekube

Fahrngruber²,

Kozich³

et al. 2019

J of Applied Polymer Sci

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This article describes the effect of processing on the properties and morphology of thermoplastic starch (TPS) and poly(butylene adipate‐co‐terephthalate) (PBAT) blends and films with high starch content. Different process parameters were modified during compounding of blends and extrusion of blown films. Morphology was examined through scanning electron microscopy. Mechanical and optical characterization of films was carried out as well. Decreasing specific throughput during compounding led to an increase in strain at break of the blends from 66 to 497%. The tensile strength increased from 6 to 22 MPa as well. The highest elastic modulus and tear resistance were achieved at intermediate specific throughputs, whereas the maximum TPS particle size and the lowest color difference were obtained at high specific throughputs. A decrease of color difference from 6.4 to 2.2 was observed by reducing the temperature profile in 5 °C. In the case of blown film extrusion, increasing the temperature profile resulted in a reduction of color difference of the films from 7.9 to 4.2. In addition, tensile strength and strain at break slightly increased. Color difference decreased with decreasing screw speed as well. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47990.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Influence of processing on the mechanical properties and morphology of starch‐based blends for film applications

Lekube

Fahrngruber²,

Kozich³

et al. 2019

J of Applied Polymer Sci

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“…The use of such "salty" plasticizers for starch processing recently regained attention since the beginning of the present decade, taking advantage of the development of Room Temperature Ionic Liquids (RTILs) () (Bendaoud & Chalamet, 2013;Colomines, Decaen, Lourdin, & Leroy, 2016;Sankri et al, 2010;Wang, Zhang, Liu, & He, 2009;Xie et al, 2014Xie et al, , 2015Zdanowicz and Spychaj, 2011;Zhang et al, 2016) acents (DES) (Abbott et al, 2014;Abbott & Ballantyne, 2011;Abbott, Ballantyne, Conde, Ryder, & Wise, 2012;Leroy, Decaen et al, 2012;Ramesh, Shanti, & Morris, 2012;Zdanowicz, Spychaj, & Maka, 2016).…”

Section: Introductionmentioning

confidence: 99%

“…These two families of salty liquids have been successfully used in combination with water for the extrusion of starch (Abbott et al, 2014;Sankri et al, 2010). Promising effects on TPS thermomechanical properties were observed: low T g values (leading to a rubbery behavior at room temperature) (Sankri et al, 2010) and a limitation of starch recrystallization during aging (Sankri et al, 2010;Zhang et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

Choline chloride vs choline ionic liquids for starch thermoplasticization

DeCaen

Rolland‐Sabaté

Guilois

et al. 2017

Carbohydrate Polymers

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Native starch containing 12% water was melt processed in presence of 23% of various plasticizers at 120°C, either by simple compression molding or by extrusion using a laboratory scale microcompounder. Glycerol, a typical starch plasticizer, was used as a reference and compared to three choline salts: raw choline chloride (which is a solid in dry state with a melting point above 300°C), and two ionic liquids synthesized from this precursor (choline acetate and choline lactate, liquids below 100°C). These ionic plasticizers were shown to allow a more efficient melting of native starch in both processes. The investigation of macromolecular structure changes during processing shows that this efficiency can be ascribed to a starch chain scission mechanism, resulting in lower specific mechanical energy input need for starch thermoplasticization compared to glycerol plasticized starch. Compared to the synthesized ionic liquids, raw commercial choline chloride leads to a good compromise between limited chain scission, and final water uptake and thermomechanical properties.

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“…The materials displayed improved tensile strength and did not recrystallise on storage. 15 The starch plastics had reduced water sensitivity and acted like true thermoplastics which could be recycled without signicant loss of mechanical properties. 9 The thermoplastic starch was also demonstrated as a binder for wood particles to make a thermoplastic material, which could be recycled.…”

Section: Introductionmentioning

confidence: 99%

Thermoplastic starch–polyethylene blends homogenised using deep eutectic solvents

Abbott

Abolibda

et al. 2017

RSC Adv.

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Polyolefin based plastics are extensively used for packaging applications and as such they tend to have a short service life but they have a long environmental persistence. One strategy to accelerate the mechanical degradation of polyolefin plastics in the environment is to blend them with carbohydrate based polymers. Unfortunately polyolefins are hydrophobic whereas carbohydrates tend to be hydrophilic so the two do not blend without chemical modification of the carbohydrate. In this study high density polyethylene, HDPE and thermoplastic starch, TPS are used as the polymers with deep eutectic solvents, DESs as the modifiers. Both TPS and DESs are biodegradable and the DESs are water miscible and biocompatible ensuring that the composite plastic contains a biodegradable flaw which should enable mechanical and chemical degradation. It is shown that DESs enable facile mixing of the two polymers. The composite has a strength similar to TPS but a ductility greater than either of the two components. The glass transition temperature of the composite plastic shows that they are homogeneously mixed and data suggests that the DESs act as lubricants rather than plasticisers. Fig. 6 Mechanical analysis of m-HDPE:TPS blends (BBbefore boiling and ABafter boiling) (a) UTS (b) elongation at break (c) stress-strain curves.This journal is

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Glycol based plasticisers for salt modified starch

Abstract: Simple quaternary ammonium salts combined with glycols form effective modifiers that produce flexible thermoplastic starch which has mechanical properties comparable to some polyolefin plastics.

Cited by 30 publications

References 16 publications

Influence of processing on the mechanical properties and morphology of starch‐based blends for film applications

Influence of processing on the mechanical properties and morphology of starch‐based blends for film applications

Choline chloride vs choline ionic liquids for starch thermoplasticization

Thermoplastic starch–polyethylene blends homogenised using deep eutectic solvents

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