Kevlar properties
Chemical make-up
Kevlar is a weaved fibre known as poly-paraphenylene terephthalamide. Kevlar is part of the aramid family. (Kevlar-The Super Tough Fiber)Aramid chemical name is aromatic polyamide. Aramids was the first organic fibre to reinforce advanced composites. The reason being it strength, and tensile modulus was high enough to be used in advance composites. The fibre mechanical properties of an aramid are higher then most materials like steel and glass fibres if the weight of all three are equal. Aramids can maintain these properties under fairly high temperatures. (Aramid fibres - An overview)
Kevlar is created by performing a condensation reaction of an acid (terephthaloylchloride), and chloride amine (1, …show more content…
As shown in the graph, as temperature increases, so does specific heat.
(DPT Kevlar Technical Guide revised)
Other Properties
As shown in the previous paragraphs. The properties of Kevlar can changed with an increase in temperature. However, with a decrease in temperature, there is no major change in properties of Kevlar. When exposed to arctic conditions. As shown in the table Kevlars tenacity, and tensile strength do not change that much. (DPT Kevlar Technical Guide revised) At temperatures of -320 Fahrenheit, or -196 Celsius Kevlar does not embrittle or degrade.
Kevlar is mostly heat resistance, but it can ignited. However, burning stops once the ignition is removed. Pulp or dust may continue to smolder once ignited. When Kevlar is being burned, there is no dripping. Dripping is a common issue with other organic fibers. Thicker the fibre, greater the glow time, however the burn length does not change based on thickness or glow time. When burned, Kevlar produces combustion gases like all wool does. Most if the time produces carbon dioxide. Based on the burning conditions, carbon monoxide, small amounts of hydrogen cyanide, and other toxic gases may also be
Chemical make-up
Kevlar is a weaved fibre known as poly-paraphenylene terephthalamide. Kevlar is part of the aramid family. (Kevlar-The Super Tough Fiber)Aramid chemical name is aromatic polyamide. Aramids was the first organic fibre to reinforce advanced composites. The reason being it strength, and tensile modulus was high enough to be used in advance composites. The fibre mechanical properties of an aramid are higher then most materials like steel and glass fibres if the weight of all three are equal. Aramids can maintain these properties under fairly high temperatures. (Aramid fibres - An overview)
Kevlar is created by performing a condensation reaction of an acid (terephthaloylchloride), and chloride amine (1, …show more content…
As shown in the graph, as temperature increases, so does specific heat.
(DPT Kevlar Technical Guide revised)
Other Properties
As shown in the previous paragraphs. The properties of Kevlar can changed with an increase in temperature. However, with a decrease in temperature, there is no major change in properties of Kevlar. When exposed to arctic conditions. As shown in the table Kevlars tenacity, and tensile strength do not change that much. (DPT Kevlar Technical Guide revised) At temperatures of -320 Fahrenheit, or -196 Celsius Kevlar does not embrittle or degrade.
Kevlar is mostly heat resistance, but it can ignited. However, burning stops once the ignition is removed. Pulp or dust may continue to smolder once ignited. When Kevlar is being burned, there is no dripping. Dripping is a common issue with other organic fibers. Thicker the fibre, greater the glow time, however the burn length does not change based on thickness or glow time. When burned, Kevlar produces combustion gases like all wool does. Most if the time produces carbon dioxide. Based on the burning conditions, carbon monoxide, small amounts of hydrogen cyanide, and other toxic gases may also be