Nuclear chemistry

Engineering

Siloxane

Char

Polymer chemistry

Thermogravimetric analysis

Pyrolysis

Metallurgy

Materials science

Coating

Phosphorus

Chemical engineering

Polymer

Thermodynamics

Physics

Organic chemistry

Limiting oxygen index

Calorimetry

Thermal

Flammability

Composite material

Chemistry

Fourier transform infrared spectroscopy

Fire retardant

Polymer science

Applied Surface Science

A novel phosphorus-containing siloxane compound, 2, 2-dimethyl-1, 3-propanediol-(3′-triethoxysilanepropyl) phosphoramidate (DPTP), was synthesized and applied to prepare flame-retardant cotton fabrics with sol-gel method. The structure of DPTP was characterized by FTIR, 1H NMR, and 31P NMR. After coating with DPTP, the limiting oxygen index value of cotton fabrics increased to 30.1%. Besides, the total heat release decreased and the char-forming capability was significantly improved, which were measured by TG and cone calorimetry test. In the vertical flammability test, the DPTP-coated cotton fabrics exhibited no afterflame and afterglow with less than 15 cm of char length. The volatile pyrolysis products were also detected by TG-IR, and the results showed DPTP-coated cotton fabrics owned both condensation and gas phase flame-retardant mechanism.

Flame retardancy and thermal behavior of cotton fabrics based on a novel phosphorus-containing siloxane