Nowadays, hybrids materials are widely studied due to their properties which result from the synergetic combination of organic and inorganic components. In this study, the inorganic part is an activated aluminosilicate source. Starch, which is an abundant macromolecule in the environment, is used as the biobased organic part. Its degradation temperature is lower than its glass transition temperature and it requires a plasticizer for its processing. A twin screw extruder is used for its mixing capability because it combines the temperature and mechanical effects necessary to the plasticization or/and reaction. The inorganic part is generated during the extrusion process to obtain an organic/inorganic blend. The TPS brings the mechanical properties and confers interesting flexibility to the material whereas the mineral filler allows enhancement of the fire resistance. The aim of this work is to modelize the kinetic reaction of the activated aluminosilicate source and to study the influence of the organic matrix as well as the fire resistance properties of the hybrid material. The rheo-kinetic of the inorganic reaction was studied by strain controlled rheometry, solid state NMR and XRD in order to predict its behavior into the organic matrix. The addition of the inorganic part in the blend has a significant impact on the fire resistance properties of the material. These were tested by using a cone calorimeter, and results as heat release rate (HRR), smoke production rate (SPR), or time of ignition have been measured. As expected, the hybrid material has a better response to fire than the TPS. The results show that the peak of heat release rate (pHRR) is ten times lower for the hybrid material than for the TPS. Some additional tests reveal a good dispersion and compatibilization between the two phases which could explain such fire resistance behavior.