Thermoplastic starch blends

An interesting feature of starch-g-PMA copolymers is their ability to shrink under high humidity conditions.122 When the PMA content is between approximately 40% and 70%, blown films exhibit shrinkages of more than 60% at 100% relative humidity. The shrunken films were reported to be stable for more than a year after returning to ambient temperature and relative humidity. They were easily removed from objects by immersion in water after shrinking. [Pg.731]

One of the first synthetic polymers to be blended with starch was poly(vinyl alcohol) (PVA). Otey et al.129,130 prepared cast films of starch and PVA from aqueous solutions containing a plasticizer (glycerol). Films were cast onto glass plates and air-dried at 130°C. Small amounts of crosslinking agent, such as formaldehyde, [Pg.731]

Starch-PVA films plasticized with glycerol embrittled with age. A study of various polyols was undertaken to identity plasticizers which would reduce this tendency.131 It was demonstrated that sorbitol and glycol glycoside performed well. When sorbitol alone was used, it migrated to the surface and crystallized. When sorbitol and glycerol were used in a 3 1 w/w ratio, the films were stable and showed no evidence of sorbitol crystallization. Substituting plasticizer with PVA did not adversely affect the films when starch was substituted for plasticizer, the films became more susceptible to aging. [Pg.732]

Films of starch-EAA blends were prepared by either casting aqueous dispersions or by dry fluxing both the polymers.133 Cast films were relatively transparent, flexible and stable on immersion in water. In contrast, the dry blended materials were opaque at starch levels greater than 30% and had poorer tensile properties at high starch contents. No plasticizers were needed to prepare flexible films. Starch-EAA films have also been prepared by extrusion.134 [Pg.732]

The use of a strong alkali other than ammonia in starch-EAA formulations yielded water-stable films with greater transparency and permeability.143,144 Permeabilities of the films to solutes such as urea, sodium chloride and sugars was reported.143 Urea exhibited the greatest diffusivity. Increasing the starch content significantly increased diffusion rates of all solutes investigated. [Pg.732]

George, E. R., Sullivan, T. M., Park, E. H. (1994). Thermoplastic starch blends with a poly(ethylene-co-vinyl alcohol) Processability and physical properties. Polymer Engineering and Science, 34, 17-23. [Pg.442]

A wide range of thermoplastic starch compounds have been claimed in recent years. Formulations of thermoplastic starch with linear, biodegradable polyesters, including polycaprolactone and PHBV,174 176 and with polyamides175 have been reported. Laminated structures have been claimed using thermoplastic starch or starch blends as one or more of the layers.175,177,178 The use of polymers latexes as components of thermoplastic starch blends has also been claimed.179 181 Blends with natural polymers are also claimed, including cellulose esters182,183 and pectin.184 A crosslinked thermoplastic material of dialdehyde starch and protein has been reported.185... [Pg.734]

Vinyl alcohol copolymers, EVAl Starch or thermoplastic starch. Blends with a wide variety of morphologies and properties —limitation is the sensitivity to H2O and embrittlement. Biodegradation takes 2-3 years. Bastioli et a/., 1992, 1993, 1994... [Pg.1154]

George, E., and Park, E. H., Thermoplastic Starch Blends with Poly(vinyl alcohol . Symposium on Engineered Polymer Blends IV Theory and Practice, Poytech. Univ., Jan 22, 1993. [Pg.1196]

C. Cerclea, P. Sarazinb, B.D. Favis, High performance polyethylene/thermoplastic starch blends through controlled emulsification phenomena. Carbohydr. Polym. 92, 138-148 (2013)... [Pg.153]

R. Thipmanee, A. Sane, Effect of zeolite 5A on compatibility and properties of linear low-density polyethylene/thermoplastic starch blend. J. Appl. Polym. Sci. 126, E251-E258 (2012)... [Pg.154]

Rodriguez-Gonzalez F.J., Ramsay B.A., Favis B.D., High performance LDPE/thermoplastic starch blends A sustainable alternative to pure polyethylene. Polymer, 44,2003, 1517-1526. [Pg.341]

M. Kaseem, K. Hamad, F. Deri, Thermoplastic starch blends a review of recent works. Polymer Science - Series A 54 (2) (2012) 165-176. [Pg.52]

Rodriguez-Gonzalez F J, Virgilio N, Ramsay B A and Favis B D (2003) Influence of melt drawing on the morphology of one- and two-step processed LDPE/thermoplastic starch blends, Adv Polym Techol 22 297-305. [Pg.397]

Biotec Bioplast Thermoplastic starch, blended with additives (e.g., plasticizers) Novon International (USA) Eco-FOAM (National Starch) Paragon (Avebe) Industrial compost... [Pg.74]

Lescher, R, Jayaraman, K., and Bhattacharyya, D. (2012) Characterization of water-free thermoplastic starch blends for mannfactnring processes. Materials Science and Engineering A, 532 178-189. [Pg.100]

Schlemmer D, de Oliveira ER, Araujo Sales Ml. Polystyrene/thermoplastic starch blends with different plasticizers. J Therm Anal Calorim 2007 87 635-8. [Pg.139]

Parulekar Y, Mohanty AK. Extruded biodegradable cast films from polyhydroxyalkanoate and thermoplastic starch blends Fabrication and charaterization. Macromol Mater Eng 2007 292 1218-28. [Pg.139]

Huneault MA, Li H. Morphology and properties of compatibilized polylactide/thermoplastic starch blends. Polymer 2007 48 270-80. [Pg.139]

Mihai M, Huneault MA, Favis BD, Li H. Extrusion foaming of semi-crystalline PLA and PLA/ thermoplastic starch blends. Macromol Biosci 2007 7 907-20. [Pg.140]

Novamont has been developing thermoplastic starch based polymers since 1990. Mater-Bi polymers are based on thermoplastic starch-blend technologies and product apphcations include biodegradable mulch films and bags, thermoformed packaging products, injection moulded items, personal hygiene items and packaging foam, [http //www.novamont.com/]... [Pg.155]

Yu, L., Christov, V., Christie, G., Beh, H., Smyth, R., Gray, J., Dutt, U., Harvey, T., Do, M., Halley, P. and Lonergan, G. (1998) Mechanical Properties and Microstructures of PLA/Thermoplastic Starch Blends. Proceedings of the 37th lUPAC International Symposium on Macromolecules 420 (Abstract). [Pg.309]

Morphology and Properties of Compatibilized Polylactide/Thermoplastic Starch Blends, Michel A. Huneault, Hongbo Li, Polymer, available on-line, 2006, In press for 2007. [Pg.1415]

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