gouazoubira, thickening of the spinal cord corresponding to the cervical intumescence
was found between segments C4-T1 and of lumbar intumescence
between L3-L6 (Figures 1 and 2).
, bum rate control, anticorrosion, quaternization sites, disassociation rate/electron transfer control, etc.
is usually referred to as the formation of an expanded superficial char layer acting as a physical barrier to reduce heat and mass (fuel and oxygen) transfer between the gas and the condensed phases (2).
Non Halogen * Alumina trihydrate * Magnesium hydroxide * Zinc borate * Phosphorus * Intumescence
Wilkie, "Influence of High Energy Radiation on the Thermal Stability of Polyamide-6," in Fire Retardancy of Polymeric Materials, the Use of Intumescence
Since several different types of mechanisms are employed, including condensed-phase reactions and intumescence
, the amounts of gases evolved are significantly lower than reaction mechanisms employing gas-phase reaction such as halogen/antimony flame retardants.
Conversely, an unfilled (v = 0), non-charring ([mu] = 0) polymer with or without a nonconducting filler would have [theta] [approximately equal to] 1, while a charring polymer would have [theta] < 1, and those exhibiting intumescence
(volumetric expansion of a char layer) would have [theta] [much less than] 1.
combined with the melting fiberglass go from an amorphous substance to a vitreous refractory silica that reportedly can withstand temperatures up to approximately 4000[degrees]F, and the metallized polyester film on the bubble wrap as well as the polyethylene of the bubble wrap start softening and form a thin film made up of both components.
Jones, in Fire Retardancy of Polymers: The Use of Intumescence
, 201-221, M.
Once again, after initial excitement, interest in intumescence
was less than anticipated.