Entwicklung von Kunststoffkomposites auf der Basis von Staerke fuer die Weiterverarbeitung zu Folie. Teilprojekt: Entwicklung und Herstellung von Staerkefolien Abschlussbericht

Available from TIB Hannover: F99B12 / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekSIGLEDEGerman

Entwicklung von bioabbaubaren Materialien auf Staerkebasis Abschlussbericht

SIGLEAvailable from TIB Hannover: F96B1340 / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekFachagentur Nachwachsende Rohstoffe e.V., Guelzow (Germany)DEGerman

Film properties of hydroxypropyl starch

The present study describes the preparation of low-substituted hydroxypropyl (HP) starches and investigation of their suitability for the development of flexible, highly transparent cast films. Changes in molecular composition due to processing conditions were identified by determining molar mass distribution. Molecular characterisation was performed both by static light scattering (SLS) and size-exclusion chromatography with multi-angle laser light scattering (SEC-MALLS) detection. The weight-average molar mass, mean square radius of gyration, second virial coefficient, and molar mass distribution were determined. Rheological characterisation of concentrated aqueous solutions included a study of flow behaviour as a function of shear rate and oscillatory measurement of viscoelastic properties. Significant differences in rheological properties due to hydroxypropylation conditions were established. Mechanical testing was carried out by measuring tensile strength and elongation and determining the elastic modulus. The tensile strength of cast films based on hydroxypropyl starches was 40-50 MPa. Elongation values were dependent on the type of starch, use of plasticiser and storage conditions

Cross-Linked Hydrophobic Starch Granules in Blends with PLA

The majority of native starch is used in the food sector and in the paper industry. Only a small amount is used in polymer engineering. One reason for the reluctance of the plastics processing industry to use starch as a filling material in polymer blends is the unsatisfactory mechanical behavior of starch when combined with thermoplastics. Another reason is the hydrophilicity of starch. In order to make these materials capable of competing, an amelioration of the mechanical properties is compulsory. By means of modifying the native starch and optimizing the compounding process, it is possible to improve the performance of starch blends, and, thus, increase the number of application areas of these materials. For this reason, native starch was modified with a cross-linking agent using a laboratory mixer. Subsequently, the modified starch and poly(lactic acid) were compounded using a co-rotating twin screw extruder. Cross-linking of the native starch in the laboratory mixer resulted in an increase in the mechanical strength of the starch blends. In addition, the blends with cross-linked starch displayed lower moisture absorption levels than blends with native starch as a filling material

Untersuchungen zum Staerkekorn. Molekulare und rheologische Charakterisierung. T. 1

Available from TIB Hannover: F94B2158+a / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekSIGLEBundesministerium fuer Forschung und Technologie (BMFT), Bonn (Germany)DEGerman

Physikalisch-chemische Charakterisierung von zuechterisch verbesserten Gersten-, Weizen- und Roggenstaerken

Available from TIB Hannover: F95B1383+a / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekSIGLEBundesministerium fuer Bildung, Wissenschaft, Forschung und Technologie, Bonn (Germany)DEGerman

Hydroxypropylierung von Staerke fuer die Entwicklung tansparenter Giessfolie Gesamtbericht

Starches based on potatoes, pea or amylo-corn have been hydropxypropylated in a slurry process and a homogenisation process, and aqueous film-forming solutions were obtained and cast into films. Salt-free cast solutions resulted in clear and transparent films with high tensile strength. The optimum conditions of the slurry and homogenisation processes and the influences on mechanical strength, storage stability and transparency of the films have been studied, and the requirements for industrial application were considered.SIGLEAvailable from TIB Hannover: F03B564 / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekBundesministerium fuer Bildung und Forschung, Berlin (Germany); Bundesministerium fuer Ernaehrung, Landwirtschaft und Forsten, Berlin (Germany)DEGerman

Entwicklung hydrophober Staerke Abschlussbericht

SIGLEAvailable from TIB Hannover: F02B1738 / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekBundesministerium fuer Ernaehrung, Landwirtschaft und Forsten, Bonn (Germany); Fachagentur Nachwachsende Rohstoffe e.V., Guelzow (Germany)DEGerman