Influence of Post-Synthesis Heat Treatments on the Molecular Structure and Thermal Stability of Phosphatized Starch

Titelangaben

Rothenhäusler, Florian ; Ludik, Felix ; Schneider, Rika ; Bretschneider, Felix ; Bojer, Beate ; Grüninger, Helen ; Greiner, Andreas ; Ruckdäschel, Holger:
Influence of Post-Synthesis Heat Treatments on the Molecular Structure and Thermal Stability of Phosphatized Starch.
In: Macromolecular Chemistry and Physics. Bd. 226 (2025) Heft 9 . - 2400252.
ISSN 1521-3935
DOI der Verlagsversion: https://doi.org/10.1002/macp.202400252

Volltext

	Format: PDF Name: Macro Chemistry Physics - 2025 - Rothenhäusler - Influence of Post‐Synthesis Heat Treatments on the Molecular Structure.pdf Version: Veröffentlichte Version Verfügbar mit der Lizenz Creative Commons BY 4.0: Namensnennung
	Download (2MB)

Abstract

The threat of fires necessitates effective flame retardants (FR) to safeguard human life and property. In response to the demand for sustainable options, bio-based FR have emerged, with phosphatized starch (PS) standing out as a promising candidate. This study explores the influence of post-synthesis heat treatments on the molecular structure of PS to enhance its thermal stability for processing in polymeric matrix materials. The molecular structure of the flame-retardant PS is characterized via solid state and solution nuclear magnetic resonance spectroscopy, Fourier-transform infrared spectroscopy, and differential scanning calorimetry. Through a comprehensive analysis of results from thermo-gravimetric analysis, thermo-gravimetric Fourier-transform infrared spectroscopy, and elemental analysis, the thermal stability and thermal decomposition mechanisms of PS are investigated. The post-synthesis heat treatment leads to the decomposition of residual urea and carbamate groups, as well as to the formation of ammonium polyphosphates. By employing thermal modification, the thermal stability and phosphorus-content are enhanced.